5 Best Window Locks (Reviewed 2022)


Premium Choice

  • ‎10 Packs
  • Sliding Track Lock
  • Durable and Sensible

Best Overall


  • ‎Pack of 2
  • ‎Sliding Window Lock
  • ‎Diecast Material

Best Value

  • ‎Single-lock, 8 Sets
  • Made of Aluminum Alloy
  • Track by Key Control

Last update on 2022-06-27 / Affiliate links / Ratings / Images from Amazon Product Advertising API

06.22.2022

Written By: John Fox | Security expert / Locksmith 30 Years Experience

Window locks are great for protecting your house, maintaining its security, and improving your safety. There are multiple window locks available in the market to choose from according to your need and requirements. Different kinds of locks work for different kinds of windows. It is common for people not to pay much attention to window locks when discussing security. Most windows in homes have a typical standard lock which does not provide much security, especially with children at home, and can be easily broken. So if you want to enhance the security system of your house and protect your family, you should install secondary locks, which reduce the chances of burglary and theft. With the advancement in technology, the installation of secondary locks has become easier.

As a security expert my company has installed hundreds of different window locks so I have some unique insights and recommendations for the best window locks around. Below I cover the top picks and best locks I have found in my experience and testing.

Best Overall

Prime-Line U 9809 Sliding Window Lock for Vinyl Windows – Easy...

Last update on 2022-06-27 / Affiliate links / Ratings / Images from Amazon Product Advertising API

1. Defender Security U 98089 Window Locks

Defender Security U 98089 Sliding Window Locks are the best in keeping your windows securely closed. They are made for vinyl windows. They provide the ultimate security, helping you keep burglars out and reducing the chance of theft. This lock can open up to about ½ inches and has an adjustable jaw with an amazing grip. These locks were initially designed for horizontal sliding windows and work perfectly with vertical sliding windows. No other tools are required to install the defender security sliding window lock, and the installation process is also very quick and easy. It hardly takes a minute to install this window lock on your own.

This lock can be adjusted according to rail thicknesses varying from 1/16 inch to ½ inch. Once the lock is adjusted on the window, you have to rotate the lever over the rail.  This lock can also be used as a secondary lock and is best to secure windows during ventilation. 

Features:

  • Color: White
  • Size: Pack of Two
  • Material: Diecast
  • Style: Sliding Window Lock 

What We Liked:

  • Every package has two adjustable jaws included in it
  • It securely locks the windows
  • It can also work as a secondary lock
  • It can be used on both vinyl windows (horizontal and vertical sliding windows)

What We Didn’t Like:

  • Its width only ranges from 1/16- ½ inches

Premium Choice

Lion Locks Sliding Window and Door Locks (10 Pack), Adjustable Aluminum...

Last update on 2022-06-27 / Affiliate links / Ratings / Images from Amazon Product Advertising API

2. Lion Locks Aluminum Sliding Door and Window Lock

Lion Locks Sliding Window and Door Locks are made of zinc die-cast. In order to install these sliding window locks, no tools are required, and they provide a very secure lock. They work well with both horizontal and vertical sliding windows. 

This sliding window lock works well with 3/16 inch wide tracks and includes protective rubbers, which are 3/8 inches wide.  You can lock the window frame from two-point points; top and bottom, or right and left, for more security. It also works well with metal frames by fixing the lock screws on the thin edges. 

Features:

  • Color: Silver
  • Size: Pack of Ten 
  • Material: Zinc Diecast
  • Style: Sliding Window and Door Lock 

What We Liked:

  • It includes locks for the sliding track
  • It is very durable
  • It does not require any other tools for the installation process
  • It also includes childproof door locks
  • It has window lock security

What We Didn’t Like:

  • The screw lock works well with metal frames, but if they are adjusted on the thin edges, it may damage the structure of the frame and may cause the window to slide down with pressure. 

Best Value

Maxdot 8 Sets Adjustable Sliding Window Locks Aluminum Alloy Window Door...

Last update on 2022-06-27 / Affiliate links / Ratings / Images from Amazon Product Advertising API

3. Maxdot Adjustable Sliding Window Locks

Maxdot Adjustable Sliding Window Lock comes with a set of eight locks. Each of the locks includes a hex key that is to be turned around, slowly maintaining it on the track to secure the window.  Other than the hex key, no other tools are required to install the lock onto the window. 

It is necessary to open the window screen when the weather is favorable to ventilate the area. Another advantage of the Maxdot adjustable window lock is that you can increase the number of the locks on the window if you want to increase security. 

Features:

  • Color: Silver and Yellow
  • Size: Set of Eight 
  • Material: Aluminum Alloy
  • Style: Sliding Window and Door Lock 

What We Liked:

  • It can be applied on both sliding windows and sliding doors
  • It has a very easy installation process. Anyone can install the lock without any guidance or prior lock installation experience
  • It is made up of aluminum alloy, and it appears to be very strong and durable

What We Didn’t Like:

  • It is necessary with these locks to open the windows once in a while or when the weather conditions are favorable for air circulation

Also Good

Onvian Window Locks, 6 Pack Aluminum Sliding Window Locks Security,...

Last update on 2022-06-27 / Affiliate links / Ratings / Images from Amazon Product Advertising API

4. Onvian Window Locks

Onvian Window Locks include two double holes, four single-hole window locks, six protective liners, and two keys. The lock is made up of aluminum. Plastic liners are included to prevent potential damage or scratches to the window. These double-holed locks are for heavy doors or windows for extra support and enhanced security and safety. The installation procedure of the lock is very easy and simple. You need to place the lock on the window or door and turn round the key to secure the lock.

It is very strong as it is made up of aluminum which can be utilized widely. It works well with horizontal sliding windows, vertical sliding windows and doors, and patio doors. It goes well with glass windows and doors as well. The measurements for the single holed lock are 1.18*0.94*0.94 inches, and for the double holed lock, it is 2.36*0.94*0.94 inches. It gives you and your family solid protection, preventing your children from opening sliding doors and windows on their own. It is suitable for a 0.63-inch thick track. (1)

Features:

  • Color: Silver and Yellow 
  • Size: Pack of Six
  • Material: Aluminum 
  • Style: Sliding Window Lock

What We Liked:

  • It makes it possible to open or close the windows completely and partially
  • It has wide applications varying from multiple types of doors and windows

What We Didn’t Like:

  • It is not suitable for the middle track of sliding windows and doors
  • It is not suitable for windows with plastic frames

Also Good

Safety Innovations - Childproof Your Windows and Sliding Doors with Our...

Last update on 2022-06-27 / Affiliate links / Ratings / Images from Amazon Product Advertising API

5. Window and Door Baby proof Safety Lock

These locks are carefully designed and manufactured with premium quality. These locks are very helpful in keeping toddlers safe and sound by childproofing sliding windows, sliding doors, sliding glass doors, sliding shower doors, and closets with mirror sliding doors. 

You will need just a few minutes for the installation process as it does not require any tools, screws, or adhesives. They are very durable and includes heavy-duty tape. If you want to increase the security, you can add two locks on each window or door, but one also works well. 

Features:

  • Brand: Safety Innovations
  • Number of Items: 1
  • Material: Plastic 
  • Style: Sliding Window and Door Lock

What We Liked:

  • Easy to install and use

What We Didn’t Like:

  • Too easy to figure out by children

Value Editorial and Buying Debates

What are the advantages and disadvantages of sliding window locks? 

There are countless advantages of sling window locks, from providing security to you, your family, and valuables to reducing the risk of accidents, and thievery. These locks allow you to make your home a better secure place for your children by reducing the risks of harm. Where sliding window locks provide numerous advantages, they also have some disadvantages. These locks are difficult to break, but they can still break, and jamming can be caused as a result, which makes it more difficult than before. (2)


FAQs

How to choose the best product?

The first thing to keep in mind when you are buying a lock for your sliding window is to check the product’s compatibility with your window type.  Ask whether it will work with your window size and whether it will go with vertically sliding windows or horizontally sliding windows. These things are very important to check before buying the product because it is not possible that a single type of lock will work with all kinds of sliding doors and windows.


Wrapping Up

In our opinion, the best lock for sliding windows in the market at present is the Defender Security U 98089 Window Lock because of its amazing features. However, if you are looking for something other than the features introduced by the Defender Security U 98089 Window Locks, four other best sliding window locks are also mentioned and explained to great length in this review. 

Here are more tips on how to secure windows from burglars. And if you want to know more learning guides, you may check the list below;


References

(1) aluminum – https://www.britannica.com/science/aluminum
(2) secure place for your children – https://www.britannica.com/topic/child-safety

Our Recommendation Again

Sale
Prime-Line U 9809 Sliding Window Lock for Vinyl Windows – Easy...
  • NOTE: Not intended for a patio door, windows only.
  • EACH PACK INCLUDES – (1) 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.
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John Fox

Allow me to introduce myself. My name is John Fox and I’ve been working as a security consultant for over 20 years now. During my time in the industry, I’ve learned about what it takes to ensure your home and family are always safe. With Safe Now, I’ve tried to take those two decades of experience and share it with others. My goal now is to help others figure out how to make the right choices for their businesses and families. On my website, you’ll find tips and guides on how to prevent crimes, as well as product recommendations. What’s more, my readers can learn more about what to do in case of an emergency and how to protect themselves at all times. So, if you want to know everything there is about security systems and home safety, I invite you to join me and my team and help us build a community together.