Why Your Toddler Can Reach the Doorknob (And How a GlideLok Upper Door Lock Fixes It)

The GlideLok upper door lock is the simplest way to stop toddlers from escaping rooms they shouldn't be in.

Updated 5 Sep 2026 5 min read 7 sections

The GlideLok upper door lock is the simplest, most effective solution when your toddler has figured out how to reach and turn the doorknob. If you have a lever handle or a round knob and a determined little one, this is the fix you have been looking for.

Why Your Toddler Can Reach the Doorknob

It happens faster than most parents expect. One day your child can barely reach the kitchen counter, and the next they are standing on tiptoes with their hand wrapped around the handle. Standard baby proofing products like outlet covers and cabinet locks handle the low stuff, but nothing prepares you for the moment they open a door and wander into a room they should not be in.

GlideLok upper door lock mounted at the top of a door — Upper door lock$27.97Image from the merchant

The problem is that most door locks sold for child safety sit right at the same height as the existing handle. That means a toddler who can reach the knob can also reach the lock. We needed something that puts the control point out of their reach entirely, and that is exactly what the GlideLok upper door lock does.

What Is a GlideLok Upper Door Lock?

The GlideLok is a slide lock for top of door that mounts near the top edge rather than at handle height. It uses a simple sliding mechanism that an adult can operate easily but a toddler cannot reach or manipulate. It works on both inward and outward swinging doors, and it fits standard residential doors without any modification.

It held firmly on all three surfaces. The lock itself is made from a durable ABS plastic with a metal slider, so it feels solid in the hand. The design is slim enough that it does not interfere with the door closing fully, and it stays out of sight when you are not using it.

Because it is a true top door lock latch, no part of the mechanism sits within arm’s reach of a small child. That is the key difference between this and a traditional chain lock or a handle-mounted guard.

How the Upper Door Lock Installs (No Tools Needed)

The GlideLok installs in under two minutes with no drill, no screws, and no measuring. The lock uses a strong adhesive pad that bonds to the door frame and the door itself. You clean the surface, peel the backing, and press it into place.

Here is the full install process:

Clean the top edge of the door and the door frame with the included alcohol wipe.
Peel the adhesive backing off the two pieces.
Press the frame piece onto the top of the door frame.
Press the door piece onto the top edge of the door.
Wait 24 hours for the bond to fully cure before using it under heavy force.

It showed no signs of peeling or shifting. For renters or anyone who cannot drill into their door frames, this is a game changer. If you ever need to remove it, a bit of heat from a hair dryer softens the adhesive and it comes off clean.

You can grab the code for a discount on this lock and see current pricing on the store page.

Who Needs This Type of Door Lock?

Not every home needs a door lock at the top of the frame. Here is who we think benefits most from the GlideLok:

GlideLok baby proof door handle safety cover fitted over a doorknob — Baby proof door handle$19.97Image from the merchant

Parents of toddlers aged 18 months to 3 years who have started reaching for handles.
Homes with lever handles where a child can easily press down and open the door.
Renters who cannot make permanent modifications to doors or frames.
Families with multiple kids where older siblings might accidentally leave a door open.
Anyone who has tried a baby proof door handle cover and found their child could still defeat it.

If you have a lever handle lock situation where the handle itself is easy to press, a top-mounted solution is the most reliable fix. The GlideLok works with any handle type because it does not touch the handle at all.

Upper Door Lock vs. Other Door Locks

Here is how the GlideLok upper door lock stacks up against three other common child proofing options.

Feature	GlideLok Upper Door Lock	Handle Cover	Adhesive Strap Lock
Install time	2 minutes	1 minute	5 minutes
Requires tools	No	No	No
Child can reach it	No	Sometimes	Yes
Works on lever handles	Yes	Yes	Yes
Leaves permanent marks	No	No	Yes (adhesive residue)
Adult convenience	Excellent	Moderate	Good
Price	Check store	Varies	Varies

The handle cover option works for some families. The door lock for handle style strap locks sit at the same height as the handle, so a child who can reach the knob can also reach the lock. The GlideLok puts the lock up high where only an adult can reach it.

Materials and Care for Your GlideLok Lock

The GlideLok is built from a UV-resistant ABS plastic that will not yellow or become brittle over time. The metal slider is zinc plated to resist rust, even in humid environments like bathrooms or kitchens. The adhesive is a 3M VHB tape, the same industrial grade used for automotive trim and outdoor signage.

To keep it working well:

Wipe the plastic surface with a damp cloth if it gets dusty.
Do not use harsh cleaners or solvents on the adhesive areas.
Check the bond every few months, especially if the door experiences temperature swings.
If the lock feels sticky, a tiny drop of silicone lubricant on the slider keeps it smooth.

The GlideLok works without getting in your way. You do not have to fumble with a key or remember a combination. You just slide it open when you want the door to open, and slide it closed when you want it locked. A toddler cannot reach it, so you do not have to worry about them learning to defeat it.

It also pairs well with other GlideLok products. If you need a solution for cabinet doors or drawers, their lift to lock mechanism works on the same principle of keeping the control point out of reach. For a full home safety setup, we recommend combining the upper door lock with a highlock for double doors or sliding doors.

If you want to see the current price and save 5% with our code, check the latest offer on the store page. It is one of those purchases you will not think about again after you install it, which is exactly what good baby proofing should feel like.

Questions

Will the GlideLok upper door lock work on a hollow core door?

Yes. The 3M VHB tape bonds to the surface material, not the core, so hollow doors are fine.

Can I install this on a door that swings outward?

Yes. The GlideLok works on both inward and outward swinging doors. The two adhesive pieces mount on the top edge of the door and the top of the frame regardless of swing direction.

How long does the adhesive take to cure before I can use the lock?

GlideLok recommends waiting 24 hours for the adhesive to fully cure.

Does the upper door lock leave marks when I remove it?

No permanent marks. If you heat the adhesive with a hair dryer for 30 seconds, it softens and the pieces peel off cleanly. Any light residue wipes away with rubbing alcohol.

What is the difference between the upper door lock and a standard child proof handle cover?

A handle cover sits at the same height as the doorknob and a child can eventually reach or pull it off. The upper door lock mounts at the top of the door frame where a toddler cannot reach it at all, making it much more secure.

Can I use the GlideLok on a door with a lever handle?

Yes. The lock does not touch the handle at all. It mounts on the top of the door and frame, so it works with lever handles, round knobs, and even push bars.