Last updated: 20 October 2026
Over time, the seals on a folding shower door can turn yellow, crack or start letting water through. Finding a replacement isn't always straightforward, though. Plenty of seals look similar in photos, but they don't all fit in the same way.
Some clip straight onto the glass, others sit inside a metal frame, and some need to be slid into a track from one end.
Before ordering, check where the old seal fits and how it's held in place, rather than going by its colour or length alone.
Seals for Frameless Folding Shower Doors
Some frameless folding shower doors use magnetic seals to bring the two glass panels together when the door is closed.
The glass thickness matters, but so does the gap between the panels and the angle at which they meet. Both magnetic strips need to line up for the seal to work properly.
If the gap is too wide, the magnets may not meet. If it's too narrow, the seals can press against each other and make the door difficult to close. So even if a replacement fits your glass thickness, it may not work with your door.
If the original magnetic seal is no longer available, there may be other ways to seal the gap. First, check whether the two glass panels need to separate when you open the door.
If they do, a seal that keeps the panels connected won't be suitable.
Where the panels stay connected as the door folds, a flexible double-U seal may be an option.
SIMBA's D06 seal, for example, has a U-shaped channel on each side to grip the glass, with a flexible section between them that allows the panels to fold.
Because it doesn't rely on magnets meeting, it can be a useful option for some wider folding joints.
The D06 is designed for gaps of approximately 8–40mm, although you'll still need to check the glass thickness and fitting position. It won't suit every frameless folding door.
If the water is getting out from the bottom rather than the joint between the two panels, check the bottom gap as well. Measure from the bottom edge of the glass down to the tray or bath rim with the door sitting in its normal closed position. Once you know that gap, you can look through our bottom shower door seal collection and match a seal to the space you need to cover.
Framed Folding Doors: Why the Track Matters
The vertical seals on some framed folding shower doors are fitted quite differently.
On certain doors, there's a small cover at the top or bottom of the frame. Once it's removed, you can see the track that holds the seal. The fixing edges slide into the track, while the softer section in the middle bends as the panels fold and helps keep water from passing through the joint.
With this type of seal, glass thickness usually isn't the measurement that matters most.
Check the shape of the track against the fixing section of the old seal.
Some tracks have a wider space inside and a narrower opening that holds the seal in place. Two seals might look almost identical, but a small difference in the width, height or shape of the fixing section can stop one from fitting.
If you still have the old seal, keep a short piece so you can look at its end profile. A photo of the track opening can also help, provided the cover can be removed safely.
And if you can't find an exact match, it doesn't necessarily mean the seal can't be replaced.
We've helped customers find suitable alternatives for older doors by comparing the original fixing profile and measurements.
In some cases, a replacement seal can be trimmed or adjusted slightly, as long as the main fixing profile is already compatible. The rigid fixing edges shouldn't be cut down without checking, though. Removing too much material could leave the seal loose in its track.
Once you've identified the track and fixing profile, you can compare the different shapes in our bi-fold and framed shower door seal range.
If we can't see the track or the end of the original seal, we're unlikely to recommend a replacement based on a photo of the whole door alone.
What to Check Before You Buy
You don't always need to know the make or model of your shower door to find a replacement. Knowing how the old seal fits is often more useful, especially if you can keep a small section to compare.
Here's what to check for each type.
| Frameless folding doors | Framed folding doors with track-fitted seals |
|---|---|
| Glass thickness | Shape and opening of the track |
| Gap between the glass panels | Width and height of the fixing section |
| Space needed when the door closes and folds | Whether the fixing section fits securely into the track |
| Photos of the door, glass joint and old seal's end profile | Photos of the door, track opening and old seal's end profile |
If your old seal is magnetic, check the gap near both the top and bottom with the door fully closed. The spacing isn't always the same all the way down.
If the water is coming from underneath the folding door rather than between the panels, you'll need to look at the bottom seal instead. Glass thickness and the gap beneath the door become more important in that case.
Try not to choose a replacement just because it's clear, the right length or looks similar to the old one. It needs to fit securely and leave enough room for the door to fold properly.
Not Sure Which Seal Will Fit? Ask Us
If you can't find your original seal, send us a few photos of the door, the end of the old seal and any measurements you have.
Someone from the SIMBA team will check the details and help you find a suitable replacement.
If we've recommended the wrong seal, we'll check the fitting details and put it right. We'll send a suitable replacement at no extra cost, or give you a full refund if we can't find one.
This applies where our recommendation was based on the correct photos and measurements you provided. We may ask for a few more details to confirm what went wrong.
You can message us on WhatsApp before ordering, and we'll help you check the fit.