Shower Screen Seal - 4-6mm Glass, 20mm Side Fin, Low Channel

What this seal is

A clear fin seal for shower doors and bath screens with 4–6mm glass, with a soft side fin at a depth of 20mm. The rigid PVC U-channel — about 9mm tall, with a 4mm mouth widening to a 6mm base — pushes straight onto the edge of the glass with no adhesive at all, and the flexible fin extends sideways level with the channel mouth to close the gap beside or beneath the screen.

It is most often used vertically — typically paired with another similar-shaped seal on the opposite edge — and can also be fitted along the bottom horizontal edge of a bath screen or shower door.

Specification

Why fit this seal

Stops leaks and protects floors. A worn, discoloured or missing seal lets water escape past the edge of the screen every shower. Replacing it protects flooring, skirting and plaster from long-term damage.

No adhesive, no mess. The channel grips 4–6mm glass on its own — it pushes straight on and comes off again without leaving residue.

Soft fin, gentle seal. The flexible 20mm fin flexes as the door moves and presses lightly against the adjoining surface, and the clear PVC is barely visible once fitted.

UK stock, fast dispatch. Held in stock in the UK and dispatched the same working day when you order before 2pm.

Fitting in three steps

1. Measure. Check your glass is 4–6mm thick and measure the edge of the glass you're sealing.

2. Choose. Pick the nearest length at or above that measurement, or use our custom cutting service.

3. Fit. Trim to length if needed, then push the channel onto the edge of the glass from one end and work your way along, so the fin faces the gap. Never slide the seal along the glass — this can damage it.

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 size before you order — usually the same working day. Got curved glass? We can curve this seal to your measurements — just get in touch and we'll send you our simple measuring guide.