12 best coolant stop leaks

Product description

Bar's Leaks Liquid Aluminum Stop Leak seals radiator leaks. Seals freeze plug leaks. Repairs gasket leaks and heater core leaks. Lowers water temperature.

• Bar's Leaks Liquid Aluminum Stop Leak seals radiator leaks. Seals freeze plug leaks. Repairs gasket leaks and heater core leaks. Lowers water temperature.
• Seals radiator leaks
• Seals freeze plug leaks
• Repairs gasket leaks
• Special Shipping Information: This item cannot be returned and has additional shipping restrictions

User questions & answers

Question:	Do I need to flush the cooling system before using this product if I had used bar’s tablet? I am choosing between these two since the leak is small
Answer:	You do not have to flush the system, in fact you may flush it after to put in the Bars Leak and run for a couple hundred miles to make sure your leak is sealed.
Question:	will this work on the head also
Answer:	Try it...it's inexpensive. Whether it works depends on the specifics of your problem. I tried it on a 4 cylinder BMW with a new head and profile gasket and a slow leak. It worked great.
Question:	can it be used in a Tahoe plastic tank
Answer:	i used it in my volvo which has a plastic expansion tank and no problems. it won't fix big leaks but if you're losing just a little coolant over time and can't find the leak this is the stuff to use!
Question:	My radiator leaking from the seam. Slightly overheating. Will this seal at the seam
Answer:	It should,depending on how big the leak/crack is,the one on my semi truck was dripping big,half a gallon a day,I was worried bc that s a $2,000.00 repair,I bought it not expecting any results,since I had previously used Bars leak (the small silver bottle) and didn t work,so this was a prayer and a last hope, 5,000 mls later and not a leak,not extra coolant added,it is liquid aluminum,so it bonds to wherever the leak is and forms a sealing coat...I think of it as welding from the inside...I hope it works for you as it did for me,it really was an answer to prayer...I know I m a bit dramatic but it was.PS,try to follow recommended amount or as close as recommended,not much less and not much more,I used 2 bottles on a 11 gal radiator.God bless.

Product features

Frequently Asked Questions

Yes, Liquid Aluminum is specifically designed to be directly added to the cooling system without having to flush out the antifreeze. It also can be used in water alone. But if using in water, it is recommended that another bottle of Liquid Aluminum be added to the system once antifreeze is installed.

Will it work in the new extended life antifreeze?

Yes, Liquid Aluminum works with all types of coolant including yellow, orange, pink, red, blue and green silicate based and non-silicate based OAT/HOAT antifreeze and/or water.

How long does it take to see results?

We recommend you drive/idle the vehicle for 10 to 20 minutes. In most cases the leak will be sealed instantly, but others will require up to 20 minutes. If the leak is not sealed in 20 minutes, a second application may be required or mechanical repair may be needed.

Bar’s Leaks is more than just a stop-leak company

We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With nearly 70 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do.

Product description

K-Seal 8 fluid ounce bottle is effective to 20 quarts cooling capacity. Just shake, pour and go. It repairs leaks and cracks in radiator, head gasket, heater core, freeze plugs, water pump casing, cylinder heads and engine blocks.

• REPAIRS IN MINUTES: Formulated to permanently weld radiators, including hard plastic aluminum heads and blocks in old and new cars. The only car radiator and gasket sealant university tested to meet ASTM D3147. Save time/money. US Bestseller
• SEALS CRACKS AND STOPS LEAKS: A DIY alternative to costly repairs, our coolant leak fix permanently seals cracks and holes! It quickly repairs your leaking radiator, freeze plug, heater core and water pump casing with no adverse impact on efficiency.
• POUR AND GO: Our cooling system sealer is easy to use: just shake the bottle, add to your radiator/overflow and run the engine! Unlike some traditional products, it mixes with all types of antifreeze, absolutely no draining or flushing required.
• SCIENTIFICALLY TESTED: Safe and effective, our cracked block repair can seal leaks up to 1/32 of an inch! Once cured, the repair withstands the high pressure of the combustion chamber, all without failing or clogging the cooling system.
• CUSTOMER SUPPORT: If K-Seal engine coolant leak stop doesn’t seal, the system might be over-pressurized. Check the Technical Specification section of this page for extra instructions for a successful repair. Over 8 million bottles sold worldwide!

User questions & answers

Question:	can you mix this with barstop if you all ready put that in the radiator
Answer:	I did mix this with Irontite All Weather Seal. Did the K-seal first. Irontite a week later. Just to be sure. Since they both said it can remain in the system. Two weeks, still good.
Question:	Can you use this in a 2013 escape
Answer:	Unless specifically told to use no heating system sealants I have no reason I can think of you can't use it. I used some but sparingly until it got the job done. Its a little bottle but still have half left. It's been okay for about 6 months now.
Question:	Does it discolor the antifreeze? Thanks
Answer:	Unfortunately I can't say. I have a GM vehicle that uses the orangish color engine coolant and it and this product are so close in color it's hard to say if it would discolor the usual green-colored coolant found in non-GM vehicles. The other challenge is that I can only look at the coolant through an overflow reservoir and it's so dark when I look inside (I have to use an LED flashlight to see it adequately) that it would be hard to tell if there was any discoloration.
Question:	will this work for leakey gaskets
Answer:	This is "liquid glass" that dries rock hard and will seal your head gasket leak (its been used in farm equipment for over 75 years and is WELL proven to work, and it was discovered over a hundred years ago), but you MUST perform a simple test. Start your vehicle, let it idle for 45 minutes straight. If the temperature gauge does not indicate that your engine is overheating, then this product will most likely work. No overheating at an idle for 45 minutes MEANS that the head gasket leak is still small enough to be filled by this liquid glass. Shake the container for 30 seconds, put the liquid in your COOLANT system, drive for an hour (or other words, operate at normal temperature, especially if its an aluminum block with cast iron heads), and then let it sit for 24-48 hours (the longest time is better). This sitting time allows the liquid glass to harden completely through. If it overheats then, it most likely its a thermostat or water pump or lower radiator hose sucking shut under load (sometimes the upper one also) or radiator or radiator fan or leaking core plug or leaking coolant storage unit OR your ENGINE OIL is very low from leaking (completely different problem that has nothing to do with the coolant system, but much to do with the cooling of the engine also) or heat indicator gauge or it still could be a blown head gasket, because the hole is just too big for the sealant to seal it up OR the head gasket BLOWS in another area after you have sealed up the first hole with the coolant sealant you added (that's why you should add it three times three different bottles of liquid glass over three months as I will mention below, that way, if it does blow in another area you will most likely SEAL that area also). But buy this and try it even if your vehicle fails the 45 minute test after 10 minutes. Sometimes, it will still seal the leak, or at least slow it down. Also, you can add this once a month for three months, and maybe that will work also (this gives you a month to see how the car performs under various conditions, and for the reason I just mentioned above). If you need the car to last for just a short while (month to six months) this can be a quick fix to hold you over until you can sell the car (under buyer be where conditions) or get it to the shop when you have the money. $15 and a few minutes of your time OR the mechanic, you have to decide. Good luck. I'm a retired mechanic with two degrees in Diesel mechanics and I ran a shop for a year.... :)

Product features

Permanent Coolant Leak Repair with K-Seal

Coolant leaks don’t have to result in costly repair bills – simply add K-Seal to your coolant system for a quick and permanent fix. K-Seal is trusted by millions of customers worldwide, and the only coolant leak repair fluid carried by the AA, the UK’s largest roadside repair company.

K-Seal couldn’t be simpler to use. K-Seal’s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.

Coolant System Sealer

Once the crack or hole has been located, the microfibers instantly begin to mesh together within the gap, building a seal literally fiber by fiber to stop the coolant leaking through the gap.

The particles in our K-Seal products are very precisely designed to be large enough to repair holes up to 0.635mm in size but deliberately small enough to never block any passageways or tubes within the cooling system, including those inside the heater core and radiator.

Once the microfibers have sealed and fixed the leak, a combination of exposure to either the external atmosphere or the gases within the combustion chamber and the heat within the cooling system and engine causes the K-Seal formula to cure. This results in an extremely strong and permanent seal able to withstand even the high pressures from the combustion chamber. This is how K-Seal Ultimate is able to repair head gasket failures, even where the cooling system is being over-pressurized exhaust gases entering the system

Common Coolant Leaks

K-Seal can deal with all of these leaks and more, as long as they are identified as early as possible. It is easy to use – simply shake it and pour it into the coolant mixture and it will work automatically.

Product description

Radiator leaks can be overwhelming, especially when you don’t have the time or the money to take your car to the shop. Many first discover these seal coolant leaks when they walk out to their car and notice a puddle sitting beneath it. The initial reaction is to assume that the leak will create an expensive visit to the garage, not to mention the inconvenience of going without your car during the repair. Well, it’s time to ease your worries, because we have created a fast and easy-to-use product that seals internal, external and coolant-to-oil leaks. Our Bar’s Leaks Pelletized Radiator Heavy Duty Stop Leak is specially formulated to seal larger leaks better than other stop leak products. You’ll find plenty of powder formula radiator stop leak products on the market, but you won’t find a seal coolant leak solution that beats ours in effectiveness. Our Pelletized Radiator Heavy Duty Stop Leak is versatile, too, working safely and effectively on plastic, aluminum and metal radiators, heater cores, gaskets and freeze plugs. It also has a water pump lube that lubricates water pump seals and inhibits the formation of rust and scale. Simply put, it’s the fast, effective, easy-to-use powder formula radiator stop leak that’s just as simple and straightforward for a regular driver as for an experienced mechanic. Convenient solutions to seal coolant leaks shouldn’t be limited to just those with advanced automotive knowledge, which is why each product in our catalog is designed to meet the needs of anyone who gets behind the wheel of a vehicle. In under an hour, you can quickly and easily solve that once-dreaded leaky radiator. Give it a try and get your car back on the road in no time.

• Seals leaks
• Conditions cooling system
• Inhibits rust and corrosion
• Lubricates water pump seals
• Helps control electrolysis

User questions & answers

Question:	What are the beads inside for? Can they be poured into the radiator
Answer:	The beads break down in the system and contain most of whats in the product to seal . ..... So yes, please pour the entire container into the vehicle. Great question... Thank you Eric
Question:	mi radiador no tiene tapa,puedo echar el sellador en el tanque de reserva
Answer:	Si!
Question:	My car does not have a cap on the top of the radiator as the coolant gets added through the overflow. How would I add this to my car
Answer:	Thank you for your question, and for considering Bar's Leaks to help with a cooling system leak. The product you are asking about - Bar's Leaks Heavy Duty Radiator Stop Leak (part number PLT11) - is designed to be installed directly into the radiator. If you don't have access to the radiator through a radiator cap, you can remove the top hose where it attaches to the radiator and install the product in through the hose. Be sure to shake the product well before installing. If installing this way is not an option for you, we would suggest you consider our Radiator Stop Leak Tablets (part number HDC) instead. These pellets can be crumbled up and installed in the overflow reservoir, as long as it is pressurized. Please note: Cooling systems that are dirty or partially clogged should be flushed before using any cooling system stop leak products. If you have any other questions or would like additional information, please feel free to call our Tech Support team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm, Eastern time.
Question:	does 2001 ford crown vic come from factory with stop leak in coolent
Answer:	I don't know. But I used this on my 2006 Ford Explorer 4.6L V-8 and it was useless. I had a very small leak in the radiator and after using this stop leak, the hole blew open a week later and all the radiator fluid came pouring out.

Product description

K-Seal 8 fluid ounce bottle is effective to 20 quarts cooling capacity. Just shake, pour and go. It repairs leaks and cracks in radiator, head gasket, heater core, freeze plugs, water pump casing, cylinder heads and engine blocks. For truck, tractor, industrial, RV and large capacity engines.

• REPAIRS IN MINUTES: Create a permanent weld within the entire coolant system, including on hard plastic radiators and aluminum heads and blocks in larger capacity engines, AG, RV etc. The only industrial coolant sealant university tested to meet ASTM D3147.
• SEALS CRACKS AND STOPS LEAKS: Avoid expensive downtime, our coolant stop leak will permanently seal cracks and holes! Quickly repair your head gasket, block, leaking radiator, freeze plug, heater core & water pump casing with no adverse impact on efficiency.
• POUR AND GO: Our cooling system sealer is easy to use just shake the bottle, add to your radiator/overflow and run the engine! Unlike some competitive products, it mixes with all types of antifreeze, no draining, flushing or pulling the thermostat required.
• SCIENTIFICALLY TESTED: Safe and effective, our Heavy Duty Coolant stop leak repair seals leaks up to 1/32 of an inch! Once cured, it withstands the high pressure of the combustion chamber, without failing or clogging the cooling system. US Bestseller
• CUSTOMER SUPPORT: If our engine coolant leak doesn’t seal your head gasket, the system might be over-pressurized. Check the Technical Specification section of this page for extra instructions for a successful repair. Over 8 million bottles sold. Save time/money

User questions & answers

Question:	Tried using alumaseal, which isn't working. will i need to flush the system before using the k-seal
Answer:	I used the HD Truck bottle on my 1998 GEO Tracker ( used 1/3 of the bottle ) of K-Seal and it worked. I have used so many to no avail. To answer your question, I must have @ least 3 to 4 other sealers in my colling system when I added K-Seal. It's been almost a year & no adverse effects having not flushed my radiator. Should I have flushed the radiator & the system? Yes, I should have.
Question:	Will this work with aluminum heads
Answer:	It works equally well with cast iron or aluminum. Great Stuff. Not a long-term solution, but it will buy you a lot of time.
Question:	how much do i need to pour in a diesel 1 ton cummins
Answer:	You need this one bottle for a Dodge 3500 hd. I have this one bottle in my HD Freightliner 330hp MBZ engine hauling freight (54,000 lbs cap) 6 days a week and it stopped my coolant leak in the engine bay and heater core with no blockage and no. My opinion, Many reviews say products dont work BECAUSE most people dont take care of their equipment and their vehicles are old, high mileage and no maintenance done. None of the add to a tank products are as good as replacing with new parts but thats expensive, we get it. This may or may not fix your problem but its a low cost gamble with a high probability of success. Dont listen to the negative reviews. If the problem comes back, your damage was too far gone and in need of replacement anyway.
Question:	Does it work on potentially warped heads
Answer:	Probably not, but read on, and learn about all coolant leak problems if you want and how effective this product is....This bottle is enough for up to 12 cylinder engines.This will work for any type of coolant leak, if the leak is small. This will work on head gasket leaks also, read this 3 minute read on what to do if its a head gasket leak. Also, for for your information - This is "liquid glass" that dries rock hard and will seal your head gasket leak (its been used in farm equipment for over 75 years and is WELL proven to work, and it was discovered over a hundred years ago), but you MUST perform a simple test. Okay, start your vehicle, let it idle for 45 minutes straight. If the temperature gauge does not indicate that your engine is overheating, then this product will most likely work. No overheating at an idle for 45 minutes MEANS that the head gasket leak is still small enough to be filled by this liquid glass. Shake the container for 30 seconds, put the liquid in your COOLANT system, drive for an hour (or other words, operate at normal temperature, especially if its an aluminum block with cast iron heads), and then let it sit for 24-48 hours (the longest time is better). This sitting time allows the liquid glass to harden completely through. If it overheats then, it most likely its a thermostat or water pump or heater core or lower radiator hose sucking shut under load (sometimes the upper one also) or radiator or radiator fan or leaking core plug or leaking coolant storage unit OR your ENGINE OIL is very low from leaking (completely different problem that has nothing to do with the coolant system, but much to do with the cooling of the engine also) or heat indicator gauge or it still could be a blown head gasket, because the hole is just too big for the sealant to seal it up OR the head gasket BLOWS in another area after you have sealed up the first hole with the coolant sealant you added (that's why you should add it three times three different bottles of liquid glass over three months as I will mention below, that way, if it does blow in another area you will most likely SEAL that area also). But buy this and try it even if your vehicle fails the 45 minute test after 10 minutes. Sometimes, it will still seal the leak, or at least slow it down. Also, you can add this once a month for three months, and maybe that will work also (this gives you a month to see how the car performs under various conditions, and for the reason I just mentioned above). If you need the car to last for just a short while (month to six months) this can be a quick fix to hold you over until you can sell the car (under buyer be where conditions) or get it to the shop when you have the money. $15 and a few minutes of your time OR the mechanic, you have to decide. Good luck. I'm a retired mechanic with two degrees in Diesel mechanics and I ran a shop for a year.... :)

Product features

Permanent Coolant Leak Repair with K-Seal

Coolant leaks don’t have to result in costly repair bills – simply add K-Seal to your coolant system for a quick and permanent fix. K-Seal is trusted by millions of customers worldwide, and the only coolant leak repair fluid carried by the AA, the UK’s largest roadside repair company.

K-Seal’s unique formula will seek out holes and cracks, and permanently seal them, with no adverse impact on the efficiency of your engine cooling.

Coolant System Sealer

Once the crack or hole has been located, the microfibers instantly begin to mesh together within the gap, building a seal literally fiber by fiber to stop the coolant leaking through the gap.

The particles in our K-Seal products are very precisely designed to be large enough to repair holes up to 0.635mm in size but deliberately small enough to never block any passageways or tubes within the cooling system, including those inside the heater core and radiator.

Once the microfibers have sealed and fixed the leak, a combination of exposure to either the external atmosphere or the gases within the combustion chamber and the heat within the cooling system and engine causes the K-Seal formula to cure. This results in an extremely strong and permanent seal able to withstand even the high pressures from the combustion chamber. K-Seal Ultimate is able to repair head gasket failures, even where the cooling system is being over-pressurised by exhaust gases entering the system.

Common Coolant Leaks

K-Seal can deal with all of these leaks and more, as long as they are identified as early as possible. It is easy to use – simply shake it and pour it into the coolant mixture and it will work automatically.

Product description

Small leaks caused by stone impacts, porous soldering points and hairline cracks in the cooling system can be easily stopped (in addition to leaks not easily seen, by noticing decreasing coolant reservoir levels after rides).

• LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease. 
• Secures the combustion chamber from damages caused by coolant admission
• For all cooling water and heating systems with and without water filters

User questions & answers

Question:	liqui molly work on diesel Radiators
Answer:	Worked on my semi truck
Question:	how much would I need for 3 1/2 to 4 gallons of coolant
Answer:	Perform a simple ratio. 150 ml of product treats 10 l of coolant. Therefore, 228 ml of product treats 15.2 l (4 gallons) of coolant.
Question:	Will this work with cracks in the plastic parts of the radiator
Answer:	Yes
Question:	How many bottles do you need for a 11 gallon cooling system
Answer:	I put 4 bottles in 10 gal system which was plenty

Product features

LIQUI MOLY

With around 4,000 items, LIQUI MOLY offers a global, uniquely broad range of automotive chemicals: Motor oils and additives, greases and pastes, sprays and car care, glues and sealants. Founded in 1957, LIQUI MOLY develops and produces exclusively in Germany. There it is the undisputed market leader for additives and is repeatedly voted the best oil brand.

Made in Germany

As a hotbed of ideas with Swabian roots and a conscientious global player, we only research, develop and manufacture in Germany, even today. And we have been raising the bar in terms of quality and service for 60 years. Our solutions are largely based on our own recipes, which we permanently test and adapt to the latest technical circumstances. Continuous quality inspections – from raw material deliveries, to production, right through to shipment – ensure maximum peace of mind.

Full Range

One brand – all solutions! We are one of the few full range brands in the world and offer more than 4,000 products from our one-stop shop! We offer the world's widest, deepest range of motor and gearbox oils, fuel and oil additives, care products, chemical problem-solvers and service products. In premium quality – always and everywhere.

Product description

Bar's Leaks Cooling System Repair.

• Stops cooling system leaks
• Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
• Premium carbon fiber formulation for extended protection

User questions & answers

Question:	Que cantidad de Cooling System Repair se pone al motor y cada cuanto tiempo
Answer:	Una botella a la vez y aproximadamente una vez cada 5000 millas. Gracias,
Question:	Has anyone us this on Diesel engine for combustion leaking into coolant
Answer:	I used it on a semi for a pump leak. It’s not a permanent fix. But it can get you a couple of days to get you home.
Question:	I have a leak in the bottom left of my radiator ... Not sure if its the radiator or the hose its kinda hard to tell. runs hot in traffic
Answer:	Hmmm... Hose leaks are hard to stop....... It's usually better to replace the hose.... If it is the radiator, this will more than likely work..... Are you running hot when the coolant is low? or are you running hot most of the time? This won't do anything to help a radiator that does not cool efficiently, the radiator would need to be replaced.
Question:	Will using this product do anything to tear up ur vehicle if ur not sure it has a leak
Answer:	Shouldn't, only flows through the closed cooling system. I had a freeze plug leaking, was too large of a leak for this to fix, noticed no adverse effects after replacing freeze plug.

Product features

Frequently Asked Questions

Yes, Cooling System Repair is specifically designed to be directly added to the cooling system without having to flush out the antifreeze as long as manufactures recommendations are followed. It also can be used in water alone. NOTE: Cooling systems that are dirty or partially clogged should be flushed before usage.

Do I need to drain my cooling system after using Cooling System Repair?

No, this product is designed to be left in the cooling system to protect from future leaks and overheating.

How long does it take to see results?

We recommend you drive/idle the vehicle for 15 minutes. In most cases the leak will be sealed instantly, but others will require up to 20 minutes. If the leak is not sealed in 20 minutes, a second application may be required or mechanical repair may be needed.

Bar’s Leaks is more than just a stop-leak company

We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With nearly 70 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do.

Product description

Picture this: you walk out to your driveway or garage and see fluid pooling on the floor, and immediately think about the inconvenience of visiting a mechanic, plus the costly bill that comes with the solution. What you need is a safe and easy way to stop that leak so you can get on with your day as planned. Our Bar’s Leaks Radiator Stop Leak Concentrate will do just that. At Bar’s Leaks, each of our products is easy to use. There’s no special automotive expertise required. If you can pop the hood on your car, you can use our radiator sealant and other products. Each of our solutions is affordable, costing just a fraction of what you’ll spend working with a mechanic. And each of our products comes with the promise of effectiveness. Our radiator stop leak concentrate is one of many chemical repair solutions available at Bar’s Leaks. This product is specially designed to stop minor cooling system leaks and drips caused by normal cooling system wear and age. It works with ALL types and colors of antifreeze coolant and/or water. All you have to do is watch Bobby and Caitlin in our how-to videos and follow our easy installation process. These videos are created to make a simple-to-use product even simpler to understand and apply to your vehicle.

• Auto & Truck Maintenance
• Country of manufacture: United States
• Manufacturer: BAR'S LEAKS
• Works with all types and colors of anti-freeze coolant
• Stops and seals coolant leaks
• One bottle treats up to 4 gallons

User questions & answers

Question:

Does it stop leaks from top of Raidator

Answer:

If you are asking about a plastic top tank that is clamped to an aluminum radiator the answer is "maybe"I had three vehicles with very tiny radiator leaks. All from the clamp seam at the sides (these were all Honda radiators) and the stop leak did work on those. One car required three bottles. But an older car with an all brass tank could not be leak stopped with just the stop leak. It did allow the owner to continue to drive the vehicle until he arranged for a real repair. The top and bottom brass tanks were unsoldered from the destroyed core and a new core was soldered in. Creating a brand new radiator. This was in an old 1060's Chrysler.

Product features

Frequently Asked Questions...

No, Bar’s Leaks Radiator Stop Leak will not clog a clean heater core. Note: If using Bar’s Leaks to stop heater core leaks, make sure you turn your heater control to HOT. Some vehicles have a valve that controls coolant flow through the core and is only opened in the HOT position.

What are the dosage recommendations?

Use one bottle for regular size cooling systems; this covers most 6, 8 and 10 cylinder engines. Use 1⁄2 bottle for four cylinder engines. One bottle treats up to 4 gallons. For larger systems use 1 bottle for every 4 gallons of capacity.

How long does it take to see results?

We recommend you drive/idle the vehicle for 15 to 30 minutes. In most cases the leak will be sealed instantly, but others will require up to 30 minutes. If the leak is not sealed in 30 minutes, a second application may be required or mechanical repair may be needed.

Bar’s Leaks is more than just a stop-leak company

We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With nearly 70 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do.

Product description

Original organic formula designed for use in radiator systems to seal leaks and prevent leaks due to casting porosity in engine components. Seals minor leaks and porosity in cooling systems. DEX-COOL compatible. Non-toxic.

• Non-toxic
• DEX-COOL compatible
• Engine application is based on liters of volume in cooling system
• Formulated for automotive use
• For use with all vehicles

User questions & answers

Question:	Will this work on a 06 scion tc
Answer:	It will work on pretty much anything. But eventually you'll need a new radiator, somewhere between 5000-20000 miles later, it's inevitable. It will just stall the radiator purchase until later.
Question:	i will be putting these in a 2003 chevy blazer do I need to fill the radiator then put the crushed tablets in how long do I need to run the car
Answer:	You can put them in crushed or put them in whole. Then just drive the car normally. What happens is the tablets will dissolve and over time, will fill in the small cracks or porous areas.I've had good results with these.
Question:	Is this product safe to use on dodge charger 2009 3.5l v
Answer:	Ya it's safe but these products aren't a fix. Just slows it up so you have time to fix it. And when you change whatever is leaking you have to do a coolant flush to get all the gunk out. This stuff turns muddy and will clog the leak . So once the leak is fixed you will want that muddy gunk out
Question:	Will this work on my honda accord
Answer:	Yes, I would Not be afraid to use them on anything liquid cooled. I think they are made of organic material and have always worked great on any vehicle that looses coolant very slowly. If you have a major leak, you would need to just do yourself a favor and get the leak fixed

Product description

Easy to use. Do it yourself formula. Seal leaks throughout your vehicles cooling system. Stops antifreeze loss. Keeps your vehicle in safe operating condition. Compatible in gasoline and diesel engines. Safe for Northstar engines. Guaranteed to help seal any leaks in and around your cooling system. Contains no solid or particulate matter. Will not clog or harm your engine. Bonds to various, different materials such as metal, aluminum, cast, alloy, or plastic. Permanent repair for all cooling system leaks. Safe for all cooling system components. No flushing required. Safely mixes with all types of antifreeze/coolant.

• Easy to use
• Seal leaks throughout your vehicles cooling system
• Stops antifreeze loss
• Keeps your vehicle in safe operating condition
• Compatible in gasoline and diesel engines

Product description

If you are a car enthusiast and know your way around under the hood, you might want to try our professional-series DiFM Professional Cooling System Treatment tablets. They are the perfect product to use any time you are servicing the cooling system, including parts replacement, flush and fills. This product inhibits the formation of rust and scale, keeps the system clean, neutralizes pH imbalance, controls electrolysis, lubricates and seals internal, external and coolant-to-oil leaks. These tablets fully dissolve in minutes and are harmless to ALL plastic, metals, aluminum, hoses and connections. It’s the strongest and most innovative treatment we make. We engineer our products to be the fastest and safest to use, so you can rest assured that these tablets will successfully protect your vehicle’s cooling system. Give them a try and get your show back on the road. But one of the best things about our cooling system treatment is that you don’t have to be a car expert to use it. At Bar’s Leaks, we specialize in developing coolant seals and other automotive solutions that are fast, effective, affordable and straightforward for everyday drivers to use. If you see a puddle underneath your car and worry about the time and money it’ll take to fix, Bar’s Leaks is your source for cooling system treatments and other products. Our coolant seal treatment inhibits the formation of rust and scale, keeps the system clean, neutralizes pH imbalance, controls electrolysis and lubricates and seals internal, external and coolant-to-oil leaks. These tablets fully dissolve in minutes and are harmless to ALL plastic, metals, aluminum, hoses and connections. It’s the strongest and most innovative treatment we make. We engineer our products to be the fastest and safest to use, so you can rest assured that these tablets will successfully protect your vehicle’s cooling system. We offer a team of top-flight chemical engineers who are always looking for ways to improve our cooling system treatment seal and other products in service to everyday drivers like you. Before you spend the time and money to visit a mechanic for a coolant seal or treatment, discover an affordable and effective option through Bar’s Leaks. Give us a try and get your show back on the road.

• Seals internal, external and coolant to oil leaks
• Stops radiator tank seal leaks
• Inhibits the formation of rust and scale
• Helps control electrolysis and helps neutralize pH imbalance
• Lubricates water pump seal

User questions & answers

Question:	Would it seal a broken heater core
Answer:	Bar's Leaks J-100 DiFM Cooling System Treatment - 5 Grams Bar's Leaks J-100 DiFM Cooling System Treatment - 5 Grams Would it seal a broken heater core? asked on December 6, 2018 Hello. Thank you for your question and for considering Bar's Leaks Cooling System Treatment (part number J-100) to help with a heater core issue. We aren't sure what you mean by "broken" heater core, but can tell you that if it has a small leak then yes, we would expect these tablets to help seal it. However, if it has a more severe leak, such as a hole in it that is causing coolant to pour right out, that may be a more difficult seal to make and may require a stronger product or a physical/mechanical repair. To use these 5 gram tablets, install 4 tablets per gallon of coolant capacity. If you have not already purchased these tablets, you may also want to consider our part number HDC - Radiator Stop Leak Tablets. These tablets are made of the same materials as the J-100, but they are 10 gram tablets that come 6 to a package, and require only 2 tablets per gallon of coolant. Please note that cooling systems that are dirty or partially clogged should be thoroughly cleaned before using either of these products. If you haven't run a chemical cooling system flush through the system in the last three to four years, we suggest you do so now. Flushing with water will remove any loose dirt or sediment in the coolant, but if there is any mineral or scale built up inside your vehicle's cooling system, it would require a chemical flush to dissolve and remove those particles. Installing our products into a clean system gives us the best chance to help you. If you have any other questions or we may be of further assistance, please feel free to call our Tech Support Team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm, Eastern time.
Question:	Is this safe to use on a power stroke diesel where the EGR cooler is dripping
Answer:	According to The manufacturer, Bars Products, This product is compatible and safe to use with all antifreeze types and in all water cooled engines. Fun Fact: Many new car manufacturers routinely use this in all their new vehicles before shipment. Just to be sure you understand what you're buying here... This is a canister of 100 tabs. If you don't need to buy for a fleet, you would be better of to buy the six pack of tablets... (HDC). Here is thew link on +Amazon to the HDC. https://www.amazon.com/dp/B000KKND3Q?ref=myi_title_dp
Question:	How long does it work
Answer:	So far it's been treated with this since about November of 2018 and is sealed and working good with no visible leaks. I learned to do exactly as the instructions states for it to work as it should. To remove the upper radiator hose and install the recommended amount of sealant tablets. I've been watching close for a coolant leak and it does work as described with no leaks. It does not appear to cause cooling system problems but does seem to help in every known way so far.
Question:	Will this plug or restrict the heater core or thermostat
Answer:	Thanks for your question and for considering Bar's Leaks DiFM Cooling System Treatment (part number J-100) to help with your automotive needs. When installed into a clean cooling system, following the proper dosage and instructions, we would not expect this product to plug or restrict any portion of your cooling system. If you haven't chemically flushed your vehicle's cooling system in the last three to four years, we recommend you consider doing so now. Flushing with water will remove anything that is in suspension in your coolant, but if there is any scale or mineral build up inside the system, a chemical flush would be required to dissolve that scale and clean the system. If you have any other questions or would like additional information, please feel free to contact our Tech Support team at 1-800-345-6572. We are here to assist you Monday through Friday, from 8 am to 5 pm, Eastern time.

Product features

Frequently Asked Questions

Bar’s Leaks Professional DiFM Cooling System Treatment 5-gram tablets are the perfect product to use any time servicing the cooling system, including parts replacement and flush & fills. It inhibits the formation of rust and scale, keeps the system clean, neutralizes pH imbalance, controls electrolysis, lubricates and seals internal, external and coolant-to-oil leaks.

Will Bar’s Leaks DiFM 5-Gram Cooling System Treatment tablets work with just water?

Yes, tablets work in systems containing only water. When used in water alone, it is also recommended to use a cooling system anti-rust and water pump lube for extra corrosion protection.

I have an extra large cooling system, how many tablets do I install?

Automotive, Fleet, Over-the-Road Vehicles and Stationary Equipment. Initial treatment – Install 4 tablets per gallon of cooling system capacity. For Preventative Maintenance – Install 2 tablets per gallon of cooling system capacity every 15,000 miles. For stationary engines or heavy duty equipment which work by hours.

Equipment Hours 250 hours for every 10,000 to 15,000 miles 500 hours for every 15,001 to 25,000 miles.

Bar’s Leaks is more than just a stop-leak company

We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With nearly 70 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do.

Each individual Bar’s Leaks product is formulated and manufactured right here in the U.S.A. We’re committed to creating fast and affordable products that fit perfectly into your lifestyle and budget. Choose Bar’s Leaks, so you can discover just how simple automotive maintenance can be when you have the right tools.

Bar’s Leaks. The fastest, safest way to get your show back on the road. Guaranteed.

Product description

Certified A/C Pro Automotive Air Conditioning UV Leak Detection Kit includes a professional grade, high-intensity true ultraviolet leak detection pen light that works with all types of UV leak detection dyes. Includes yellow tinted glasses and batteries. For detecting leaks in automotive air conditioning systems. Directions: Put batteries into the light by unscrewing light base. On/Off button is located on bottom of light. Add Ultraviolet Light dye to system being tested. Allow UV dye to circulate. Always wear UV safety glasses. Use light to check for leaks.

• High-intensity true ultraviolet leak detection pen light
• AAA batteries included
• Works with all types of UV leak detection dye
• Includes yellow tinted protective glasses
• Professional grade

User questions & answers

Question:	Do you have to wear yellow tinted glasses
Answer:	Wearing the yellow tinted glasses helps to show up the flouresent due that you put in the system.
Question:	Is the dye included? xD
Answer:	Dye is not included, only UV light and glasses.
Question:	What is the difference between the uv light and the glasses? Can you look for a leak in the day light with the glasses
Answer:	The yellow glasses are intended to protect your eyes from the high-intensity UV light produced by the pen. They filter out the UV light, but the glow from the leak detection dye is still visible while wearing them. They should always be worn when using the UV light pen.
Question:	Is it easy to carry
Answer:	A case is not included. I keep my glasses in a sock to protect them.

Product description

Prestone Radiator Stop Leak features a patented formula that quickly stops leaks in radiators, water pumps, and heater cores while also protecting against pitting and corrosion. Prestone Radiator Stop Leak takes sealing performance to a higher level by both stopping the leak as well as the corrosive condition that causes leaks in the first place. Its unique combination of natural and synthetic components provides the ability to seal leaks up to 0.020-inches x 0.5-inches. What makes this possible is the size, strength, and durability afforded by fibrous particles, the same materials in bulletproof vests. Prestone Radiator Stop Leak particles have been chosen to seal even large leaks without interfering with the flow through the radiator and heater core tubes. It also boosts corrosion inhibitors to protect against pitting and corrosion, which cause radiator leaks.

• Patented formula quickly stops leaks in radiators, water pumps, and heater cores
• Boosts corrosion inhibitors to protect against pitting and corrosion, which cause radiator leaks
• Combination of natural and synthetic components provides the ability to seal leaks up to 0.020" x 0.5"
• Seals even large leaks without interfering with the flow through the radiator or heater core
• Stops the leak as well as the corrosive condition that causes it

User questions & answers

Question:	Is this product silicate free. For a 1997 Cadillac Seville
Answer:	I returned this product because I sold the car
Question:	Do you have to use 50/50 antifreeze coolant or can you use water in replace of antifreeze
Answer:	You can. I wouldn’t. Antifreeze is also coolant. You should never put straight water in your radiator.