Vertical Shower Seal - 4-6mm Glass, Fin 8/15/20/25/35mm

What this seal is

A clear vertical fin seal for shower screens and doors with 4–6mm glass. The rigid PVC channel simply pushes onto the edge of the glass — no adhesive, no screws, no drilling — and the flexible clear fin closes the gap between your door and the adjacent wall, tiles or fixed panel, stopping water escaping every time you shower.

Because the fin is available in five depths, one profile covers gaps from just 3mm right up to 35mm. It's most commonly fitted along the bottom horizontal edge of a bath screen or shower door, and works just as well vertically on the upright of the glass.

Choose the right fin depth

Measure the gap you need to close, then pick the fin depth that covers it:

If your gap sits between two fin sizes, choose the larger fin — the flexible blade compresses to fit and gives a tighter seal.

Specification

Why fit this seal

Stops leaks instantly. A worn, discoloured or missing seal is the most common cause of water pooling outside the shower. Replacing it takes minutes and protects flooring, skirting and plaster from long-term water damage.

No adhesive, no mess. The channel grips 4–6mm glass on its own — it slides straight on and can be removed or repositioned without leaving residue on the glass.

One profile, five fin sizes. Whether your gap is 3mm or 35mm, the same clip-on channel with the right fin depth closes it neatly — and the clear PVC is barely visible once fitted.

Cut to fit at home. Order the next length up and trim it down for a perfect edge-to-edge fit, or use our custom cutting service and it arrives ready to fit.

Fitting in three steps

1. Measure. Check your glass is 4–6mm thick, measure the edge of the glass, and measure the gap you need to close.

2. Choose. Pick the fin depth that covers your gap from the table above, and the nearest length at or above your measurement.

3. Fit. Trim to length if needed, then push the channel onto the edge of the glass so the fin faces the gap. Done — no tools, no adhesive, no drying time.

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