Bifold Shower Seal - 6mm T-Head, 21mm Tall, Seals 16-21mm Gaps

What this seal is

A clear seal for bifold and channel-fitting shower doors, with a 6mm T-head and a tall 21mm body that closes large gaps of 16–21mm. The T-shaped head slots into the aluminium or plastic channel on the door rail — no adhesive needed, though a dab of silicone is optional.

It fits horizontally along the bottom rail of a shower door or bath screen sitting high above the tray, or vertically between the glass and the wall. Made from soft, flexible PVC, it cuts cleanly to size with household scissors.

How to check it fits your door

Check two measurements: the slot in your channel should take a 6mm T-head (possibly slightly narrower), and the gap you need to close should be 16–21mm. Got a smaller gap? We stock shorter heights in the same 6mm T-head family — and if your gap sits between two sizes, choose the taller seal for a tighter close.

Specification

Why fit this seal

Closes large gaps other seals can't. The tall 21mm body is made for doors sitting well above the tray, stopping water escaping under the door every time you shower.

Slots straight into your existing channel. No adhesive, no screws — the T-head slides into the channel your old seal came out of.

Cuts with scissors. The soft flexible PVC trims cleanly at home for a perfect edge-to-edge fit.

UK stock, fast dispatch. Order before 2pm and your seal is dispatched the same working day.

Fitting in three steps

1. Measure. Check the channel slot takes a 6mm T-head, measure the width of the door rail, and confirm your gap is 16–21mm.

2. Choose. Pick the 1000mm or 2000mm length at or above your measurement.

3. Fit. Slide out the old seal and clean the channel, cut the new seal to the door's width, then feed the T-head in at one end and slide it fully across.

Not sure it fits?

Email a photo of your old seal or your measurements to sales@industrial-polymers.co.uk and our UK team will confirm the right profile and height before you order — usually the same working day.