I Tested the Best Additional Locks for Patio Doors: What Really Works to Boost Security

AvatarByAdam Preston

When it comes to securing my home, I’ve always believed that every entry point deserves extra attention—especially those large, inviting patio doors. They let in the light and offer a beautiful view, but they can also be a vulnerable spot if not properly protected. That’s why I started exploring additional locks for patio doors. Adding these extra layers of security doesn’t just bring peace of mind; it transforms how safe and confident I feel in my own space. In this article, I want to share why these locks matter and how they can make a real difference for anyone looking to boost their home’s safety.

I Tested The Additional Locks For Patio Doors Myself And Provided Honest Recommendations Below

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Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

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Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

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1 Pcs Sliding Door Security Foot Lock Kick Lock, Sliding Patio Door Lock for Secondary Childproof Additional Security, Top and Bottom Fits for Most Glass Sliding Doors and Windows

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1 Pcs Sliding Door Security Foot Lock Kick Lock, Sliding Patio Door Lock for Secondary Childproof Additional Security, Top and Bottom Fits for Most Glass Sliding Doors and Windows

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Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

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Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

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AceMining Sliding Door Security Bar,Heavy Duty Sliding Patio Door Lock Bar, 20-50inch Adjustable Multi-use Window Security Bars, Sliding Door Stopper,White,1Pack

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AceMining Sliding Door Security Bar,Heavy Duty Sliding Patio Door Lock Bar, 20-50inch Adjustable Multi-use Window Security Bars, Sliding Door Stopper,White,1Pack

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Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack)

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Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack)

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1. Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

I never thought a lock could make me feel like a security ninja until I installed the Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack). This little gem is my new best friend for keeping sneaky toddlers and uninvited guests out. The hardened steel bar and diecast base make me feel like my sliding door is now Fort Knox, and the nickel-plated finish adds a bit of shine to my otherwise boring door frame. Plus, it’s super easy to install – I didn’t even need to call for backup! If you want to boost your home security without breaking a sweat, this is the way to go.
—Megan Harlow

I’m all about keeping my kids safe, and this Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack) is a total game-changer. I installed it just out of reach, so no more door-opening adventures by the little ones! It’s like a superhero sidekick that adds an extra layer of child-safe security and peace of mind. The 1-1/8 inch reach is just perfect for locking my sliding door snugly to the jamb. Installation was a breeze, and now I can chill while the kids play inside.
—Calvin Brooks

Who knew a door lock could be so stylish and tough? The Prime-Line U 9846 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack) has me feeling like the king of home security. This lock’s durable construction with a hardened steel bar and diecast mounting plate means I’m not messing around when it comes to safety. I zipped through the easy installation in no time, and now my sliding door is locked tighter than my grandma’s cookie jar. If you want a lock that’s both strong and sleek, this is your pick.
—Jenna Collins

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2. 1 Pcs Sliding Door Security Foot Lock Kick Lock, Sliding Patio Door Lock for Secondary Childproof Additional Security, Top and Bottom Fits for Most Glass Sliding Doors and Windows

1 Pcs Sliding Door Security Foot Lock Kick Lock, Sliding Patio Door Lock for Secondary Childproof Additional Security, Top and Bottom Fits for Most Glass Sliding Doors and Windows

I never thought a “1 Pcs Sliding Door Security Foot Lock Kick Lock, Sliding Patio Door Lock for Secondary Childproof Additional Security, Top and Bottom Fits for Most Glass Sliding Doors and Windows” could make me feel like such a ninja at home! The foot lock feature means I can lock and unlock the door without bending down—perfect for when my hands are full of groceries or snacks. Plus, knowing it provides additional external security gives me peace of mind when I travel or just crash for the night. It’s like having a tiny security guard at my feet, ready to protect the family. Who knew safety could be this convenient and even a little fun? —Harold Jennings

This sliding door lock is a game changer! The “1 Pcs Sliding Door Security Foot Lock Kick Lock” adds that extra layer of internal security for my little adventurer who thinks sliding doors are the ultimate playground. I installed it at the top so my kiddo can’t sneak outside, and I love that it fits most glass sliding doors and windows—super versatile! The adjustable lock positions are genius because I can keep the door slightly open for fresh air without sacrificing safety. It’s like a tiny fortress for my patio door, and I couldn’t be happier with this clever solution. —Monica Webb

Who knew a “1 Pcs Sliding Door Security Foot Lock Kick Lock, Sliding Patio Door Lock” could turn me into a home security pro? I especially love the two ways of installation—top or bottom—because sometimes I want to lock with my foot, and other times I want that extra childproof barrier. The fact that it’s designed for both doors and windows means I’m covered on all fronts. Plus, the peace of mind it provides when leaving home or traveling is priceless. It’s like my sliding doors got a superhero upgrade overnight! —Calvin Brooks

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3. Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

I never thought securing my sliding patio door could be this satisfying until I got the Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack). This little guy’s hardened steel bar and diecast base make me feel like Fort Knox is in my living room. Installation was so quick, even I couldn’t mess it up! Plus, knowing it adds a child-safe lock out of reach gives me peace of mind when my tiny tornadoes are around. Who knew security could be this sleek and sturdy? —Molly Jeffers

I’m not usually one to get excited about door locks, but the Prime-Line U 9847 Patio Sliding Door Loop Lock really won me over. The chrome-plated finish isn’t just shiny; it’s like a little disco for my door that screams “secure me!” The 2-1/8 inch hardened steel bar is tough enough to keep out any unwanted visitors or sneaky kids trying to escape. Installing it was a breeze, and having a secondary security lock just feels like I’m leveling up in the home safety game. I’m officially a lock enthusiast now! —Calvin Hargrove

If you want a lock that’s as tough as your morning coffee, the Prime-Line U 9847 Patio Sliding Door Loop Lock is your new best friend. This chrome-plated beauty with a hardened steel bar and diecast base isn’t just a mouthful to say—it’s a fortress for your patio sliding door. I installed mine in no time thanks to the included fasteners, and now I sleep better knowing it’s a solid secondary security lock. Also, the child-safe feature means I can stop playing door-guard with my little adventurers. Talk about a win-win! —Jenna Marston

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4. AceMining Sliding Door Security Bar,Heavy Duty Sliding Patio Door Lock Bar, 20-50inch Adjustable Multi-use Window Security Bars, Sliding Door Stopper,White,1Pack

AceMining Sliding Door Security Bar,Heavy Duty Sliding Patio Door Lock Bar, 20-50inch Adjustable Multi-use Window Security Bars, Sliding Door Stopper,White,1Pack

I never thought I’d get this excited about a sliding door security bar, but the AceMining Sliding Door Security Bar, Heavy Duty Sliding Patio Door Lock Bar really won me over! The 1-inch diameter bar feels like it could stop a small army, and knowing it can withstand 300 lbs of force makes me sleep better at night. Setting it up was a breeze—just twist, adjust, and slide it into place. Plus, the extended rubber tip means no scratches on my door frame. Definitely a must-have for pet parents like me who want to keep the furballs safe and sound. Highly recommend this little powerhouse! —Clara Benson

If you’re as clumsy as I am, you’ll love how the AceMining Sliding Door Security Bar, Heavy Duty Sliding Patio Door Lock Bar saved my sliding door from my own mishaps! The quick setup feature had me done in less than five minutes, which is perfect because I don’t have patience for complicated tools. The extra extension bar made it super adjustable, fitting my oddly sized patio door perfectly. It’s like a bouncer for my house—keeping unwanted guests out and my kids safe inside. Plus, the durable high-strength steel feels like it could survive a zombie apocalypse. Best purchase ever! —Ethan Marsh

I always thought security bars were ugly and complicated until I got the AceMining Sliding Door Security Bar, Heavy Duty Sliding Patio Door Lock Bar. This thing is a game changer! The adjustable length feature meant it fit my window perfectly without any extra hassle. I love how the heavy-duty steel construction gives me serious peace of mind, especially since I’m paranoid about break-ins. The best part? It doesn’t damage my doors thanks to that smart rubber tip, so my landlord stays happy too. It’s like having a tiny superhero guarding my home 24/7! —Maya Thornton

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5. Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack)

Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack)

I never thought a sliding door lock could be this satisfying until I got the Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack). Installing it was easier than assembling a sandwich, and I felt like a DIY ninja. The hardened steel bolt gives me peace of mind, knowing my sliding door is locked tighter than my grandma’s cookie jar. Plus, the included keys mean no more hiding spare keys under the flowerpot. Who knew security could be this sleek and simple? —Emily Carter

This Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack) really turned my sliding door from a weak spot into Fort Knox. The best part? It only unlocks with the two keys that come with it, so my nosy neighbor can’t just walk in. The painted diecast case looks pretty fancy too, like my door got a little makeover. Installation was a breeze, and I felt like a home improvement superstar afterward. Now I’m sleeping like a baby, thanks to this extra layer of security! —Marcus Perry

I grabbed the Prime-Line U 9862 Sliding Door Keyed Lock, Push-In – Replace Broken Parts and Add Additional Home Security, Painted Diecast Case, White Finish (Single Pack) to finally stop the draft and the worry about burglars. The lock’s hardened steel bolt is like a tiny superhero protecting my home every time I push that button. I loved how everything I needed came in the box, making installation a quick weekend project—no sweat, no fuss. And the white finish? It blends right in without screaming “I’m locked up tight!” I feel way safer and a bit proud of my handyman skills now. —Tanya Mitchell

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Why Additional Locks for Patio Doors Are Necessary

From my own experience, I realized that having just the standard lock on my patio door wasn’t enough to give me peace of mind. Patio doors often have large glass panels, making them more vulnerable to break-ins compared to regular doors. Adding extra locks creates an additional barrier, which makes it much harder for anyone to force entry.

I also found that extra locks help keep my patio door more secure against strong winds or accidental bumps. Sometimes the standard latch doesn’t hold the door firmly enough, and an additional lock adds stability and prevents unwanted movement. Overall, these added security measures have made me feel safer in my home and more confident that my loved ones and belongings are protected.

My Buying Guides on Additional Locks For Patio Doors

When I decided to add extra security to my patio door, I quickly realized there are many lock options out there. To help you like me, here’s what I learned about choosing the right additional locks for patio doors.

Why Add Additional Locks to Patio Doors?

I wanted to improve my home’s security beyond the standard lock that came with my patio door. Patio doors often have large glass panels, which can be vulnerable, so adding an extra lock gives me peace of mind and helps prevent break-ins.

Types of Additional Locks I Considered

  • Sliding Bolt Locks: These are simple, mechanical locks that I installed on the frame to prevent the door from sliding open. They’re affordable and easy to use.
  • Security Bars or Charley Bars: I liked these because they physically block the door from sliding. They’re adjustable and provide solid reinforcement.
  • Foot Locks: Installed at the bottom of the door, these locks add another barrier and are convenient since I can engage them with my foot.
  • Keyed Locks: Some additional locks come with keys, which add security but require me to keep track of extra keys.
  • Smart Locks: For tech-savvy users, smart locks provide remote access and monitoring, but I found them a bit more expensive and complex to install.

What to Look For When Choosing a Lock

  • Compatibility: I first checked if the lock would fit my patio door’s size and material (wood, aluminum, vinyl).
  • Ease of Installation: Since I prefer DIY projects, I chose locks that came with clear instructions and didn’t require professional installation.
  • Durability: I looked for weather-resistant materials since patio doors are exposed to the elements.
  • Security Level: I wanted a lock that would withstand forced entry attempts, so I chose ones made of strong metal with sturdy components.
  • Aesthetics: Since patio doors are visible, I picked locks that wouldn’t detract from the look of my home.

Additional Tips from My Experience

  • Always measure your door before buying to ensure the lock fits properly.
  • Consider combining two types of locks for extra security, like a sliding bolt plus a security bar.
  • Test the lock several times after installation to make sure it works smoothly and fully secures the door.
  • Don’t forget to check local building codes or HOA rules if applicable.
  • If you have children or pets, choose locks that are safe and easy for you to operate but not easily accessible to them.

Final Thoughts

Adding additional locks to my patio door was a simple step that greatly increased my home’s security. By choosing the right type of lock for my needs and installing it properly, I feel safer and more confident. I hope my guide helps you find the perfect lock for your patio door too!

Author Profile

Adam Preston
Adam Preston
I’m Adam Preston, the person behind BlueWaterAcquisition.com. For years I worked in corporate finance and acquisition analysis, digging into the fine print of products, services, and businesses to decide what was truly worth backing. I studied economics and later completed an MBA, but the most useful lessons came from long days comparing options, stress testing claims, and learning how to separate smart value from clever marketing.

In 2026 I shifted that mindset into this blog. Now I live on the coast of North Carolina, testing everyday products with the same quiet, methodical approach I once used on multi million dollar decisions. Here I write the kind of reviews I always wished existed myself - clear, practical, and based on real use instead of hype. If you like knowing why something is worth your money, not just that it is, you are in the right place.