Shower Door Bottom Seals: Free Delivery & Extra 15% OFF

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Buy 1 Bottom Gasket, Get 1 Threshold Seal FREE

Buy any bottom door trim for shower door today and we’ll throw in a matching threshold seal — completely free.

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10-Month Warranty

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Better Together: Bottom Gaskets + Threshold Strip

A shower door bottom gasket works best when paired with a threshold seal — especially for frameless shower doors or screens doors.

Used together, they form a watertight barrier that stops leaks, even under strong water pressure.

On their own, bottom trim may not be enough — especially if there’s no raised edge on the shower tray.

Pair them up, and your bathroom stays dry.

Shower Threshold Seal

Load video: This video, the test was conducted using SIMBA's bottom shower door sealTest Conditions:Time: 2:00 PMHumidity: 35%Temperature: 19°CTest Procedure:Install the seal strip onto the simulated testing device.Adjust the device settings.Begin the test.Complete 30,000 simulated shower door open/close cycles.Display the product for inspection.Conclusion: After 30,000 cycles, the seal strip remained in perfect condition, showing no deformation and maintaining its original shape.

Shower Door Bottom Seal

More Than 30,000 Uses!

After 30,000 uses, our bottom seal remained in perfect condition, showing no deformation and maintaining its original shape.

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Universal Shower Door Bottom Seal

A versatile shower seal for leaks, designed to fit any glass thickness and seal gaps ranging from 12mm to 35mm.

1 6

£3.48

~~£7.08~~ £3.48

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Taxes included. Shipping calculated at checkout.

Lengths: Sample 100mm Sample 100mm 950mm

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Mind the Gap: Under 25mm? Try Adhesive Seals

If the gap between your shower door and the floor feels too tight to work with, a push-in seal might be hard to install — especially if there’s not enough room to tilt or push it in properly.

In that case, an adhesive bath seal is a smarter choice — especially when paired with a threshold strip.

Even if a push-in seal might fit, but installation feels like a struggle, adhesive seals can save you time and frustration.

Not sure which one works best?

Grab a sample pack and test both at home.

Buy Adhesive Seal

FAQ About Shower Door Bottom Seal

Replace your shower door bottom seal if it’s cracked, loose, mouldy, covered in limescale — or if it comes off with a pull under 50N of force, even if it still works.

For hygiene and a proper seal, a fresh one makes a big difference.

SIMBA seals are built to last over 30,000 door cycles, so you won’t need to replace them often.

All our seals can be trimmed to size.

Yes! Several of our seals are perfect for pivot-style enclosures. Be sure to check the gap and thickness.

That squeaking sound usually means the seal is too tight — it’s being squashed in a gap that’s too small.

The fix? Choose a bottom seal that matches your shower door’s gap properly.

Each of our shower door bottom seals is designed for a specific gap range.

Pick the right one, and the noise will disappear.

No. Please refer to our article ‘Why Bulb Shower Door Seals Never Be Installed at the Bottom’.

Customers feedback

Arrived the next day

The shower door bottom gasket arrived the next day in perfect condition in a strong cardboard tube. Brilliant service. I like to commend the website too as it is full of the dimensions of each seal so identifying the correct part was easy.

Brilliant service and product

Seal for my very awkward shower door was delivered so quickly and worked a treat! Fantastic service and fantastic product which I literally couldn’t find anywhere else!!!! Thank you!!!

Great company

The clear and thorough website guidance, availability of samples for double-checking size and profiles, and ready access to personal advice if needed were all much appreciated. So was the swift and efficient despatch of my order.

Perfect replacement bifold door seal

Had a seal deteriorated on a my shower bifold hinge section between the two doors, couldn’t find a replacement from the manufacturer (Coram, Optima) as doors were so old. Took a chance as the ‘T’ seals are the same measurement. Fitted perfectly, really happy.