When should I replace the seal at the bottom of my shower door?

You should replace your shower door bottom seal if it shows any of the following: Cracked, Loose, Mouldy, Yellowed, Covered in Limescale.

How to cut shower door bottom seal?

You can easily cut our bath bottom seals to size using garden secateurs (pruners). If you are using regular scissors, first score a line where you want to cut, and then snap the seal strip along that mark.

Do you offer seals that work with pivot shower doors?

Yes! Several of our bottom sweep are perfect for pivot-style enclosures.

How do I stop my shower door seal from squeaking?

Good question! That squeaking noise usually means the seal's fin is being crushed because the gap is too small. The size is mismatched. Please choose a bottom seal that correctly fits your shower door gap size. Once the size is right, the noise will disappear.

Do bottom shower door seals also fit curved shower doors?

Curved doors require specific curved bottom seals. You must not try to heat and soften a straight seal to force it onto curved glass.

Can the shower bulb seal be used on the bottom?

You can, but we don't recommend it. The bulb seal's hollow top design traps soap and water, which quickly accelerates the ageing and degradation of the seal.

What's the difference with Single vs. Twin Fin bottom sweep?

Double-fin seals naturally offer better water deflection than single-fin seals. However, if you use a single-fin seal paired with our transparent D510 threshold strip, you can achieve perfect water blocking performance.

Must I Remove the Glass to Change My Shower Seal?

Absolutely not! You do not need to remove the door or glass for installation. Even if your bottom gap is too small for a regular glass bottom seal strip, the solution is simple: switch to an Adhesive Seal!

Collection: Shower Door Bottom Seals

30,000-Cycle Certified Seals for 4mm, $6$ mm, $8$ mm & $10$ mm Glass.

Choose the right one — by glass thickness, gap size, and door type.

All our seals are compatible with major UK shower brands.

New to DIY? Read our Measurement Guide or learn Which Seal to Fit First for a leak-proof finish.

10-Month Warranty

30-Day Hassle-Free Returns

Next Day UK Dispatch

PCI-DSS Compliant Checkout

SIMBA bottom sealing strip compared to other brands' sealing strips

Why SIMBA Seals Last Longer

Most seals look the same — until you’ve used them.

SIMBA seals are made for real homes, real showers, real results.

Discover the SIMBA Difference

Leaking at Bottom?

Don’t just replace your seal—fix the leak for good

Water escaping from under your shower door isn't just a mess; it's a risk to your floorboards and your safety.

Whether you have a sagging door, an uneven floor, or the wrong seal profile, SIMBA expert guide breaks down the 6 most common causes of bottom leaks and how to solve them in under 10 minutes.

FAQ About Shower Door Bottom Seal

When should I replace the seal at the bottom of my shower door?

You should replace your shower door bottom seal if it shows any of the following: Cracked, Loose, Mouldy, Yellowed, Covered in Limescale.
How to cut shower door bottom seal?

You can easily cut our bath bottom seals to size using garden secateurs (pruners). If you are using regular scissors, first score a line where you want to cut, and then snap the seal strip along that mark.
Do you offer seals that work with pivot shower doors?

Yes! Several of our bottom sweep are perfect for pivot-style enclosures.
How do I stop my shower door seal from squeaking?

Good question! That squeaking noise usually means the seal's fin is being crushed because the gap is too small. The size is mismatched. Please choose a bottom seal that correctly fits your shower door gap size. Once the size is right, the noise will disappear.
Do bottom shower door seals also fit curved shower doors?

Curved doors require specific curved bottom seals. You must not try to heat and soften a straight seal to force it onto curved glass.
Can the shower bulb seal be used on the bottom?

You can, but we don't recommend it. The bulb seal's hollow top design traps soap and water, which quickly accelerates the ageing and degradation of the seal.
What's the difference with Single vs. Twin Fin bottom sweep?

Double-fin seals naturally offer better water deflection than single-fin seals. However, if you use a single-fin seal paired with our transparent D510 threshold strip, you can achieve perfect water blocking performance.
Must I Remove the Glass to Change My Shower Seal?

Absolutely not! You do not need to remove the door or glass for installation. Even if your bottom gap is too small for a regular glass bottom seal strip, the solution is simple: switch to an Adhesive Seal!

Holding an ultra-transparent shower sealing strip in my hand

Guide For Bottom Seal

What is that plastic strip called? A complete guide.

Bulb Seal vs. Drip Rail: Which one fits your door?

How to measure glass thickness and gaps accurately

Tired of leaks? [Check our Troubleshooting Tips]

Explore All 30+ Shower Seal Fitting & Buying Guides →

Why SIMBA Seals Last Longer

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!!!

Perfect replacement bifold door seal

Had a rubber bottom strip 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.