3 best window lock for sliding window

Window locks for sliding windows are essential hardware components designed to enhance the security and safety of sliding windows in homes or commercial buildings. Here's what you should know about them:

Purpose and Functionality:
- Window locks for sliding windows are primarily designed to prevent unauthorized entry, secure the window in a closed position, and deter potential intruders.
- They typically consist of two components: a locking mechanism attached to one window sash and a receiver or strike plate affixed to the opposite sash or window frame.
- When engaged, the locking mechanism fits into the receiver, preventing the sliding window from being opened from the outside.
Types:
- There are various types of window locks for sliding windows, including:
  - Pin Locks: These locks feature a pin that can be inserted into a hole on the sliding sash or frame, preventing movement.
  - Keyed Locks: Keyed locks offer added security and require a key to unlock and slide the window open.
  - Thumb-Turn Locks: These locks are operated by turning a thumb-turn knob, providing convenience for quick locking and unlocking.
  - Clamp Locks: Clamp locks use a clamping mechanism to secure the window in a closed position.
  - Bolt Locks: Bolt locks involve sliding a bolt or bar into a slot on the window frame or sash to lock it in place.
Materials:
- Window locks are typically made from durable materials such as metal (e.g., steel, aluminum, or brass) or high-strength plastic to ensure longevity and resistance to tampering or forced entry.
Installation:
- Most window locks for sliding windows are relatively easy to install and come with mounting hardware.
- Proper installation is crucial to ensure the lock functions effectively and securely.
Compatibility:
- It's important to choose a window lock that is compatible with your specific type of sliding window, as the design and dimensions can vary between windows.
Additional Features:
- Some window locks may have additional features such as adjustable length, allowing them to fit various window sizes.
- Others may have tamper-resistant mechanisms or anti-lift features to enhance security.
Maintenance:
- Regular maintenance involves cleaning the lock components, checking for loose screws or parts, and lubricating moving parts to ensure smooth operation.

In summary, window locks for sliding windows are crucial components of home security and safety.They come in various types and materials to fit different window styles and security needs. Proper installation and maintenance are essential to ensure their effectiveness in securing your sliding windows.

Below you can find our editor's choice of the best window lock for sliding window on the market

Defender Security U 9809 Sliding Window Lock for Vinyl Windows – Easy Installation to Keep Windows Securely Closed – White Diecast Construction (Pack of 2)

Defender Security

Based on 2 reviews Check latest price

Product description

Keep your windows securely closed and safe with these U 9809 Sliding Window Locks for Vinyl Windows. The locks feature an adjustable jaw that has a “vise-like” grip, and they are capable of opening up to ½” wide. Use them to prevent unwanted intruders from breaking into windows or to prevent accidental falls. These locks are designed for use on horizontal vinyl sliding windows, although they may also work with some vertical sliding (single hung) windows. Installation is quick and easy with no tools required – a more secure window is just minutes away! When installing this lock, the cam style locking lever should be rotated hand-tight over the rail or vinyl edge to a sufficient torque prior to locking down the lever. This lock can be adjusted to fit on rail thicknesses ranging from 1/16 in. to 1/2 in. thick. This sliding window lock can be used as a secondary lock when window is shut and to secure the windows during ventilation. For a larger version of this lock (used on vinyl frame patio sliding doors) see model number U 10547.

From the Manufacturer

This sliding window lock is constructed of diecast and comes in a white painted finish. This lock is DESIGNED FOR USE ON HORIZONTAL VINYL SLIDING WINDOWS, yet it may also work with some vertical sliding (single hung) windows, depending upon the type of vinyl liners and balances used to construct the windows. Note: These locks will fit most all horizontal vinyl sliding windows and some vertical sliding windows, but not all of them. These locks feature an adjustable jaw that has a “vise-like” grip, and they are capable of opening up to 1/2 in. wide for a secure, non-marring hold on thick vinyl rails. When installing this lock, the cam style locking lever should be rotated hand-tight over the rail or vinyl edge to a sufficient torque prior to locking down the lever. This lock can be adjusted to fit on rail thicknesses ranging from 1/16 in. to 1/2 in. thick. This lock can be used as a secondary lock when window is shut and to secure the windows during ventilation. For a larger version of this lock (used on vinyl frame patio sliding doors) see model number U 10547. No tools are required for installation.

EACH PACK INCLUDES – Adjustable jaw that fits all vinyl frame rail thicknesses from 1/16" up to 1/2 in. thick. "Vise like" grip holds securely and will not mar frame. Allows window to lock in ventilating position; cam style locking lever; no tools required. This is for Vinyl Windows only.
SECURELY LOCK WINDOWS – These U 9809 sliding window locks for vinyl windows help keep them securely closed. The locks feature an adjustable jaw that has a “vise-like” grip, and they are capable of opening up to ½” wide.
ADD EXTRA SECURITY – Use these sliding window locks to prevent unwanted intruders and avoid falling accidents –keeping your windows closed when you want them the most secure! Air and a breeze can get in, but no intruders.
FOR USE ON MOST VINYL WINDOWS – These sliding window locks are for use on horizontal sliding windows and most vertical sliding (single hung) windows as a secondary window lock.
PRODUCT INFO – These sliding window locks have a diecast construction with a white painted finish and can fit most vinyl frame rail thicknesses ranging from 1/16” to ½”.

User questions & answers

Question:	is this somthing that can keep my 6yr old from the window all the way or could it be easly removed by him
Answer:	That seems like a loaded question. When I was 4, I figured out how to put a kitchen chair next to the counter. Climb on the counter and hoist myself to the top shelf of the cupboard to retrieve a bottle of Flintstones vitamins. I subsequently ate the whole bottle and had to have my stomach pumped. Kids are smart. Nothing is completely kidproof. Having said that, it depends on the type of window. Does it slide left to right or up and down? Mine slide up and down, and a child would have to be tall enough to reach high enough to unlatch them.
Question:	does this come with 2 pcs in a pack? or this is only fr 1 unit
Answer:	Luckily, I saved a packaged pack for back-up. The USB on it says 0 49793 09809 2, and it is indeed a 2-pc packet (which states "Fits 1" wide rail"). The cam locking mechanism also makes re-placing the lock easy.
Question:	How does it work? Are you going to post any pictures of it in use
Answer:	They work great. Seems like it would be easier to break a window than to try to force a window that is locked with two of these. Simply twist them until they begin to tighten to window frame, then clamp them down. They tighten the rest of the way when you clamp them, a lot like vise grip pliers. I'm adding two photos to help.
Question:	Can I use this product in sliding doors
Answer:	U 10547 is the door version of this item

Maxdot Adjustable Sliding Window Locks Aluminum Alloy Window Door Frame Security Locks with Key for Home and Office (Double-Locks, 4 Sets)

Based on 301 reviews Check latest price

Product description

Features:

Double open design:

Each lock is equipped with hex key, spin the key slowly through the hole, just holding on the track by key control, no additional installation tools.

Quality material:

Made of aluminum alloy, which is sturdy and strong, and there's a yellow plastic cover outside the key handle, can serve you for a long time.

Necessary items:

Open the screen window when the weather is hot in summer, which can improve air circulation, you can use the window locks to fix the screen window, it can prevent children from falling and prevent the thieves.

Specifications:

Size: 6 x 2.4 x 2.4 cm/ 2.4 x 0.94 x 0.94 inch (LWH)

Material: aluminum alloy

Quantity: 4 sets

Package includes:

4 x Sliding window locks with key

Notice:

Multiple locks can be applied to heavy window or door together to increase safety.

Apply to windows and doors: make sure the track heights more than 1.5 cm/ 0.6 inches, track thickness no more than 1.6 cm/ 0.63 inches, not applicable to the middle track of the window, please check your window track before buying
Double open design: compared to other window locks, this window locks adopt enhanced double open design, which obtain stronger friction force so that it can lock more solid for safer security
Quality material: made of aluminum alloy, which is sturdy and strong, and there's a yellow plastic cover outside the key handle, can serve you a long time
Necessary items: open the screen window when the weather is hot in summer, which can improve air circulation, you can use the window locks to fix the screen window, it can prevent children from falling and prevent the thieves
What you get: 4 x sliding window locks with key; Note: multiple locks can be applied to heavy window or door together to increase safety

User questions & answers

Question:	Will there work on sliding glass doors
Answer:	It all depends on the dimensions. The ridge the door slides against can’t be thicker than 3/4”, and must be at least 1/2” tall. The yellow key handle is so wide, it may be impossible to use unless you saw the ears off the yellow plastic part so it can clear the floor when being turned.
Question:	Does these work for vertical sliding(up and down) windows
Answer:	Yes. Any window where the lock can be fitted over an edge of the frame above or beside the window.
Question:	what are the little plastic sheet pieces that come with it for
Answer:	My guess is to protect the ledge from damage. Ours are hard rubber, so not needed.
Question:	does this product come with 4 keys
Answer:	Yes and plastic slides (4) to put against the end of the screw and the window frame so it doesn’t cause damage

SYOSIN Sliding Door Lock (4 Pack) for Child Safety, Baby Proof Sliding Window Lock with Strong Adhesive Tape for Patio, Closet, Shower Sliding Door, Shutter and More

Based on 511 reviews Check latest price

[ AIRPLANE WING SHAPE DESIGN ] - Our sliding door locks limit and stop the opening of sliding doors according to the ingenious design.The switch is concealed, the adult is easy to open, but it is difficult for child and pets to open.
[ STRONG AND EASY TO USE ] - Very strong and easy to use locks create a firm seal when closed. Made of durable ABS plastic, they will keep your child as well as your pet out of closets, cabinets, and pantries that have sliding doors.（Size: 11.5*8.5*0.8cm.）
[ INSTALLS IN MINUTES ] - Our door locks are very easy to install. Simply clean the surface you want to paste, remove the Tape backing and press onto the desired location for up to one minute. No tools, no fuss. The adhesive sticks on strong and removes easily without damaging the surface. This convenient 4 pack can be applied to multiple doors.
[ WORKS ON MANY SURFACES ] - These door locks work well on most wood, glass, plastic, and metal surfaces. You can childproof your patio, closet, shower, storage, and entertainment center sliding doors as well as your sliding windows. Your baby can explore without getting hurt.
[ WARM TIPS ] - ①The latch needs clearance(greater than 0.8cm, less than 3.5 cm) between the door or window gap; ②.Installation should be in a place that the baby can't touch; ③Please allow 24 hours for adhesive to dry before usage for maximum strength; ④In order to improve performance and effectiveness, please use at least two or more safety locks on the door or window.

User questions & answers

Question:	Where do I install on sliding door? Above the lock? Not sure how this works when installed
Answer:	Yes, it can do, as this v860II-c flash has a function: Master, Slave, Off
Question:	Would these work on a regular window so my toddler couldn’t open it
Answer:	He’s it will it’s a great buy
Question:	Is it removable? (Rental place
Answer:	Please choose godox X1R-C receiver if you want to trigger canon flash. https://www.amazon.com/dp/B018G4EAVQ?ref=myi_title_dp
Question:	Do I need two for one sliding glass door or sliding window
Answer:	Yes,it will work for canon eos t7i