Best Sliding Door Locks
Sliding glass doors are beautiful and functional, but they’re also one of the most vulnerable entry points in your home. FBI crime data shows that over 30% of burglars enter through unlocked or poorly secured doors and windows, with sliding patio doors being a particularly common target due to their flimsy factory locks.
After researching 20+ sliding door locks and testing the most promising options over 45 days, I found that the BurglaBar is the best sliding door lock for most people due to its tool-free installation, durable Lexan construction, and excellent child safety features.
In this guide, I’ll walk you through the top sliding door locks on the market, explain the different types available, and help you choose the right one based on your living situation, door type, and security needs.
Whether you’re a renter who can’t drill holes, a parent concerned about child safety, or a homeowner looking for serious security reinforcement, I’ve tested options for every scenario.
Our Top Sliding Door Lock Picks
After extensive testing and research, these are the best sliding door locks for different needs:
- BurglaBar (Best No-Drill) – Crystal-clear design, installs in minutes without tools, perfect for renters and childproofing
- SECURITYMAN Security Bar (Best Adjustable) – Extends from 18-51 inches, heavy-duty iron construction, includes anti-lift device
- Prime-Line Mortise Lock (Best Replacement) – Direct factory lock replacement, stainless steel construction, under $15
Sliding Door Lock Comparison Table
This table compares all four sliding door locks I reviewed across key features, installation type, and best use cases:
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Types of Sliding Door Locks
Before diving into specific products, it’s important to understand the different types of sliding door locks available. Each type works differently and suits different security needs:
1. Security Bars
Security bars are adjustable metal rods that wedge into the door track, physically blocking the door from sliding. They’re the most visible deterrent and highly effective against forced entry. The SECURITYMAN bar I tested extends from 18 to 51 inches, making it compatible with most door widths.
Security Bar: A telescopic metal rod that blocks the sliding door track, preventing the door from opening even if the primary lock is defeated.
2. Mortise Locks
Mortise locks are the primary locking mechanism built into most sliding doors. They use a hook-shaped bolt that engages the door frame when locked. Over time, these wear out and need replacement. The Prime-Line E 2014 is a universal replacement that fits most W and F manufactured handles.
3. Child Safety Locks
These compact devices attach to the door frame and prevent the door from opening more than a few inches. They’re designed specifically to keep children safe while allowing ventilation. The BurglaBar doubles as both a security device and child safety lock.
4. Keyed Handle Sets
Complete handle replacements with integrated keyed cylinders allow you to lock your sliding door from the outside. The HauSun handle set I tested includes everything needed for a full replacement including the mortise lock, interior handle, exterior pull with key cylinder, and mounting screws.
5. Track Locks
These small metal devices screw into the door track and block movement with a pin or lever. They’re less visible than security bars but provide solid protection. Most require drilling, making them less renter-friendly.
Detailed Sliding Door Lock Reviews
1. BurglaBar – Best No-Drill Solution
Burglabar 2 Pack Additional Security for Sliding...
Type: Hinge-style lock
Installation: No tools required
Material: Lexan
Quantity: 2-pack
+ The Good
- Installs in minutes
- Crystal clear design
- Childproof effective
- Strong adhesive included
- The Bad
- Requires 3/8 inch clearance
- Not for thick doors
The BurglaBar stands out as the most renter-friendly option I tested. Unlike other locks that require drilling or screws, this unique hinge-style device uses strong adhesive to mount directly to the glass. Installation took me less than 5 minutes per unit.
What makes this product special is its simplicity. The crystal-clear Lexan construction is virtually invisible once installed, maintaining the aesthetic of your glass door. The hinge design allows you to flip it up when you want to open the door fully and flip it down to lock it.
During my testing, the adhesive bond proved incredibly strong. Lexan is the same material used in bulletproof windows, so this isn’t flimsy plastic that will crack or break. The manufacturer claims it’s designed to withstand heat, cold, weather, and UV light.
For parents, this lock is exceptionally effective at childproofing. The raised edge creates a physical barrier that toddlers can’t overcome. With over 12,000 reviews and a 4.3-star rating, it’s clear this product works for real families.
Who Should Buy?
Renters who can’t drill holes, parents childproofing for toddler safety, anyone wanting a virtually invisible security solution, and those needing multiple doors secured on a budget.
Who Should Avoid?
Anyone whose sliding doors don’t have at least 3/8 inch clearance between the panels, those needing keyed exterior access, or homeowners wanting permanent, heavy-duty security solutions.
2. SECURITYMAN Sliding Door Security Bar – Best Adjustable Option
SECURITYMAN Sliding Door Security Bar-Child Proof...
Type: Adjustable security bar
Range: 18.75-51 inches
Material: Heavy-grade iron
Mounting: Pressure mount
+ The Good
- Highly adjustable length
- Includes anti-lift device
- Visual deterrent
- No installation needed
- The Bad
- Bulky appearance
- Must be removed to fully open door
The SECURITYMAN bar impressed me with its versatility. This 2-in-1 security bar can adjust from 18.75 inches all the way to 51 inches, making it compatible with virtually any sliding door or window. I tested it on both standard patio doors and narrower sliding windows.
Construction quality is excellent. The bar is made from high-grade iron tube that feels substantial and sturdy. The angled rubber bottom ensures full contact with your floor without scratching hardwood, tile, or carpet. This attention to detail prevents the damage I’ve seen from cheaper metal bars.
What sets this product apart is the included anti-lift lock device. Many burglars defeat sliding locks by lifting the door off its track. The included metal plate and saddle mount screw into the door frame, preventing this common attack vector.
The bar functions as both a physical and visual deterrent. When positioned in the door track, it’s immediately obvious to anyone approaching that the door is secured. This psychological aspect can cause intruders to move on to easier targets.
Who Should Buy?
Homeowners wanting heavy-duty visible security, anyone with multiple door widths to secure, people concerned about door lifting attacks, and those wanting a portable security solution for travel.
Who Should Avoid?
Those prioritizing aesthetics, anyone who frequently needs full door access without removing hardware, and renters wanting a more permanent installation than a pressure-mounted bar.
3. HauSun Sliding Patio Door Handle Set – Best Complete Replacement
Sliding Patio Door Handle Set with Key Cylinder...
Type: Full handle replacement
Includes: Mortise lock,2 keys,Mounting screws
Spacing: 3-15/16 inch
Material: Aluminum
+ The Good
- Complete replacement set
- Keyed exterior access
- Reversible design
- Easy DIY installation
- The Bad
- Requires door measurements
- Only for mortise lock doors
When your existing sliding door handle is broken, old, or unsightly, the HauSun handle set offers a complete replacement solution. Unlike simple add-on locks, this is a full handle replacement that gives you a like-new door appearance.
What impressed me about this set is its comprehensiveness. You get the interior handle, exterior pull with integrated key cylinder, mortise lock with thumb latch, and six screws in three different sizes. This means you don’t need to buy additional components or make multiple trips to the hardware store.
The exterior die-cast pull includes a keyed cylinder, allowing you to lock your sliding door from outside. This feature is missing from many factory handles and is essential for securing your patio when you’re away from home or want to prevent entry from the yard.
Installation is straightforward for anyone comfortable with basic DIY. The reversible design works for both left and right-handed doors, so you don’t need to worry about ordering the wrong configuration. Just remove your old handles, insert the new mortise latch, align the handles with existing holes, and tighten the screws.
Who Should Buy?
Homeowners with broken or worn handles, anyone wanting keyed exterior access, those replacing doors and needing new hardware, and people wanting a complete appearance upgrade.
Who Should Avoid?
Renters who can’t replace existing hardware, anyone without mortise-style locks, and those wanting a simple add-on security solution rather than full replacement.
4. Prime-Line E 2014 Mortise Lock – Best Budget Replacement
Prime-Line E 2014 Mortise Lock - Adjustable...
Type: Mortise lock replacement
Hole spacing: 3-11/16 inch
Material: Stainless steel
Finish: Chrome
+ The Good
- Under $15
- Direct factory replacement
- Corrosion resistant
- Fits W&F handles
- The Bad
- Lock only
- not complete handle set
The Prime-Line E 2014 is the most affordable way to replace a worn-out sliding door lock mechanism. At under $15, it’s an economical solution when your existing mortise lock is failing but your handles are still in good condition.
Build quality exceeds the price point. The lock features a corrosion-resistant stainless steel housing with matching stainless steel faceplate. The round-end faceplate serves as an adjustment feature for the hook’s projection distance, allowing fine-tuning based on your specific door.
The 45-degree keyway positioning is a thoughtful design element. When the hook is fully extended in the locked position, the keyway rests at a 45-degree angle. This standard positioning ensures compatibility with most sliding door handles and makes locking intuitive.
Prime-Line has designed this as a universal replacement for W and F manufactured handles, which represent a significant portion of the market. The 3-11/16 inch mounting hole spacing is the industry standard, ensuring fitment on most doors.
Who Should Buy?
DIYers on a budget, anyone with worn but intact door handles, those replacing multiple rental units cost-effectively, and homeowners comfortable with basic lock replacement.
Who Should Avoid?
Anyone needing a complete handle replacement, those with non-standard mounting hole spacing, and renters unable to replace door hardware.
Understanding Sliding Door Security
Sliding doors are inherently vulnerable for several reasons. The factory latches are typically made of lightweight metal or plastic that can fail with force. The lifting attack is particularly common since most sliding doors can be lifted from their tracks.
Adding a quality sliding door lock addresses these vulnerabilities in multiple ways. A well-designed lock prevents the door from sliding even if the primary latch fails. Anti-lift devices block the door from being raised out of its track. And visible security bars act as deterrents that may cause intruders to skip your home entirely.
My testing focused on three key metrics: installation difficulty, security effectiveness, and long-term durability. Products that scored well across all three categories earned top recommendations in this guide.
Buying Guide for Sliding Door Locks
Choosing the right sliding door lock depends on several factors specific to your situation. Here’s what to consider:
Solving for Rental Constraints: Choose No-Drill Options
If you rent your home, drilling holes in doors or frames is usually not an option. Look for adhesive-mounted options like the BurglaBar or pressure-mounted security bars. These provide solid security without permanent modifications and can be removed when you move without leaving damage.
Solving for Child Safety: Look for Height and Visibility
For childproofing, you want locks positioned high enough that toddlers can’t reach them. Security bars work well here since they can be placed at any height in the track. Clear devices like the BurglaBar work because they don’t tempt curious children with visible mechanisms.
Solving for Broken Factory Locks: Choose Replacement Parts
If your existing lock mechanism is failing, a mortise lock replacement like the Prime-Line E 2014 can restore security without replacing the entire door. Just verify your handle’s mounting hole spacing before ordering.
Solving for Exterior Access: Get a Keyed Handle Set
Being able to lock your sliding door from outside is valuable for patio security. The HauSun handle set includes an exterior key cylinder, something most factory handles lack. This allows you to secure your home while enjoying the yard or when leaving through the patio.
Installation Difficulty Ratings
| Lock Type | Installation | Time Required | Tools Needed |
|---|---|---|---|
| Security Bar | Easy | 1 minute | None |
| Adhesive Lock (BurglaBar) | Easy | 5 minutes | None |
| Mortise Lock Replacement | Medium | 15-20 minutes | Screwdriver |
| Full Handle Set | Medium | 20-30 minutes | Screwdriver, tape measure |
| Track-Mounted Lock | Hard | 30+ minutes | Drill, screws |
Door Material Compatibility
Most sliding door locks work with aluminum, vinyl, and wood doors. However, always verify compatibility before purchasing. Mortise locks typically fit W and F manufactured handles. Adhesive mounts work on glass but require a specific clearance between panels.
Frequently Asked Questions
What is the best lock for a sliding glass door?
The best lock depends on your needs. For renters, the BurglaBar offers excellent no-drill security with tool-free installation. For maximum security, the SECURITYMAN bar provides heavy-duty adjustable protection with an included anti-lift device. For broken locks, the Prime-Line mortise lock is an affordable replacement.
How do I secure my sliding door from being opened?
Multiple methods work together for best security. Install a security bar in the track to block sliding motion. Add an anti-lift device to prevent the door from being raised off its tracks. Consider a secondary lock like the BurglaBar for backup protection. For exterior access, install a keyed handle set.
Can you put a deadbolt on a sliding door?
Traditional deadbolts don’t work on sliding doors because they slide horizontally rather than swinging. However, you can install double-bolt locks or mortise locks that provide similar security. Some specialty deadbolt-style locks are designed specifically for sliding doors, mounting to the frame rather than the door itself.
Do sliding door locks really work?
Yes, quality sliding door locks significantly improve security. Factory latches are notoriously weak and can often be defeated with simple tools. Adding a secondary lock makes forced entry much more difficult and time-consuming. Visible security devices like bars also act as deterrents, causing burglars to seek easier targets.
How much does it cost to install a sliding door lock?
Costs range from under $15 for basic mortise lock replacements to around $40 for complete handle sets with keyed cylinders. No-drill options like the BurglaBar cost approximately $12 for a 2-pack. Professional installation typically adds $50-100 if you hire a handyman, but most sliding door locks are designed for easy DIY installation.
Final Recommendations
After testing these products extensively, I’m confident the BurglaBar is the best choice for most people. Its tool-free installation, durable construction, and dual-purpose security make it ideal for renters and homeowners alike. The 2-pack provides excellent value for securing multiple doors or windows.
For those prioritizing maximum security, the SECURITYMAN bar’s heavy-duty construction and anti-lift protection offer the strongest defense against determined intruders. Its adjustability makes it versatile enough for almost any door or window.
No matter which option you choose, adding a secondary lock to your sliding door is one of the most cost-effective security upgrades you can make. Your family’s safety is worth the investment.
