Shower Door Bottom Seals

Find the right shower door bottom seal to help reduce water leaking under your shower door.

Start with two quick checks: your glass thickness and the gap under the glass.

1. Shop by glass thickness
4–6mm glass 8–10mm glass
2. Shop by bottom gap
No gap Under 9mm 9–12mm 13–16mm 17–20mm 20mm+
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Once you know your glass thickness and bottom gap, use the filters below to narrow products by door type and seal profile.

Common bottom seal profiles include fin seals, sweep seals, side-fin seals, brush-style seals, bulb seals and U-channel bottom seals for sliding doors, pivot and hinged doors, frameless doors and bath screens.

Shower door bottom seal with clear threshold seal preventing water leaks on a glass shower door

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64 products

Cross-section view of the S456DTL 4-6mm glass bottom seal installed, highlighting the transparent U-channel grip and extended side fins that create a zero-gap barrier against water leakage.Detailed dimension diagram of the S456DTL slimline bottom seal, specifying exact inner width for 4-6mm glass, fin length, and total height to ensure compatibility with various shower door types.

4–6mm Glass Side-Fin Shower Door Bottom Seal | S456DTL

£14.88
£20.88 £14.88
Profile view of the VB456 bottom seal fitted on 4-6mm glass, illustrating the transparent U-channel grip and the dual-fin configuration designed to provide extended coverage and enhanced water deflection on shower thresholds.Technical dimension diagram of the VB456 strip, specifying the 4-6mm inner channel range and the length and spacing of the twin fins, intended to accommodate varying floor levels and gap widths.

4–6mm Glass Double-Fin Shower Door Bottom Seal – 9mm Fin | VB456

£14.88
£43.19 £14.88
V456S12 4-6mm glass shower door bottom seal with 12mm finV456S12 shower door bottom seal dimensions for 4-6mm glass

Shower Door Bottom Seal Strip for 4–6mm Glass – 12mm Fin | V456S12

£14.88
£20.88 £14.88
V456S16 4-6mm glass shower door bottom seal with 16mm finV456S16 shower door bottom seal dimensions for 4-6mm glass

4–6mm Glass Shower Door Bottom Seal – 16mm Fin | V456S16

£14.88
£20.88 £14.88
Close-up cross-section of the VD456 seal for bottom of shower door fitted on 4-6mm glass, showing the transparent U-channel, side guide rails, and the unique 17mm single fin with a central small bulb design for enhanced sealing on uneven floors.Technical dimension diagram for a shower bottom seal, detailing the inner channel width, 17mm central fin length (including central bulb diameter), and overall profile height with lateral stabilising rails, engineered for precise replacement on 4-6mm thick glass.

4-6mm Glass Shower Door Bottom Gasket Replacement 17mm Fin VD456

£14.88
£20.88 £14.88
Close-up cross-section of the V456S20 shower door bottom gasket fitted on 4-6mm glass, showing the transparent U-channel, side guide rails, and extended 20mm single fin gripping standard thickness glass to cover wider gaps.Technical dimension diagram for a 4-6mm glass bottom seal, detailing the inner channel width, 20mm central fin length, and overall profile height with lateral stabilising rails for precise replacement to solve floor gap issues.

4–6mm Glass Shower Door Bottom Seal – 20mm Fin | V456S20

£14.88
£20.88 £14.88
"Profile view of the V456S2023 walk-in shower seal fitted on 4–6mm glass, featuring a symmetrical transparent U-channel with side guide rails and an extra-long central 23mm fin designed to bridge wide floor gaps effectively.""Technical dimension diagram of the V456S2023 strip, specifying the precise 4–6mm channel width, the maximum 23mm reach of the centrally positioned fin, and complete profile measurements for accurate fitting."

4–6mm Glass Shower Door Bottom Seal – 23mm Fin | V456S2023

£14.88
£20.88 £14.88
Profile view of the VC456 offset bottom seal fitted on 4-6mm glass, showing the asymmetric U-channel design with a supporting side triangle and an 18mm fin engineered to span gaps from 15mm to 18mm at the shower base.Technical dimension diagram of the VC456 strip, detailing the 4-6mm inner channel, the 18mm fin length, and the effective coverage range of 15–18mm for accommodating wider floor-to-glass separations.

4–6mm Offset Shower Door Bottom Seal – 15–18mm Gap | VC456

£14.88
£20.88 £14.88
D456S7 vertical shower door bubble seal for 4–6mm glass and small side gapsD456S7 shower door bubble seal profile for 4–6mm glass with 7mm bubble

Vertical Bubble Shower Door Seal for 4–6mm Glass – 6mm Gap D456S7

From £14.88
£21.00 From £14.88
Large bubble vertical shower seal for 4–6mm glass shower doors, sealing gaps up to 11mmD456S12 vertical shower door seal with large bubble design for 4–6mm glass and 11mm gap

Large Bubble Shower Door Seal for 4–6mm Glass Up to 11mm Gap D456S12

From £14.88
£21.00 From £14.88
Profile view of the DA456S15 hybrid seal fitted on 4-6mm glass, illustrating the combination of a soft compressible bulb for sealing and a rigid extended fin for water diversion, designed to bridge gaps up to 15mm in bottom or side configurations.Macro close-up of the DA456S15 transparent body, highlighting the high-gloss finish and the robust structural integration between the soft bulb and the guiding fin, engineered to maintain shape integrity under significant compression.

Bottom / Vertical Bubble Shower Door Seal for 4–6mm Glass Up to 15mm Gap DA456S15

From £14.88
£21.00 From £14.88
Profile view of the S8DTL 8mm shower bottom gasket fitted on standard thickness glass, showing how the transparent U-channel and side fins create a watertight zero-gap seal for any door configuration.Technical specification diagram of the S8DTL 8mm zero-gap strip, detailing precise inner width, fin extension length, and overall height to guarantee compatibility with versatile frameless shower setups.

8mm Glass Gasket Side-Fin Shower Door Bottom Seal | S8DTL

£14.88
£20.88 £14.88
Profile view of the VB08 bottom seal fitted on 8mm glass, showcasing the precise U-channel grip for thicker panels and the twin-fin arrangement designed to enhance water deflection on shower thresholds.Technical dimension diagram of the VB08 strip, specifying the dedicated 8mm inner channel width and the measurements of the dual fins, intended to accommodate standard 8mm glass enclosures with varying floor gaps.

8mm Glass Double-Fin Shower Door Bottom Seal – 9mm Fin | VB08

£14.88
£43.19 £14.88
V810S12 8-10mm glass shower door bottom seal with 12mm finV810S12 shower door bottom seal dimensions for 8-10mm glass

8–10mm Glass Shower Door Bottom Seal – 12mm Fin | V810S12

£14.88
£20.88 £14.88
Close-up cross-section of the V810S16 shower door bottom gasket fitted on 8-10mm glass, showing the transparent U-channel, side guide rails, and 16mm single fin gripping thicker glass to effectively cover medium-width floor gaps.Technical dimension diagram for an 8-10mm glass bottom seal, detailing the inner channel width, 16mm central fin length, and overall profile height with lateral stabilising rails for precise replacement to solve common floor drainage gaps.

8–10mm Glass Shower Door Bottom Seal – 16mm Fin | V810S16

£14.88
£20.88 £14.88
Close-up cross-section of the V810S20 seal at bottom of shower door fitted on 8-10mm glass, showing the transparent U-channel, side guide rails, and extended 20mm single fin gripping thicker glass to effectively cover larger floor gaps.Technical dimension diagram for a bottom seal for shower screen, detailing the inner channel width, 20mm central fin length, and overall profile height with lateral stabilising rails, engineered specifically for precise replacement on 8-10mm thick glass.

8–10mm Glass Shower Door Bottom Seal – 20mm Fin | V810S20

£14.88
£20.88 £14.88
Close-up cross-section of the V810S2023 bottom of shower screen seal fitted on 8-10mm glass, showing the transparent U-channel, side guide rails, and extra-long 23mm single fin gripping thicker glass to effectively cover very large floor gaps.Technical dimension diagram for a bottom shower door seal, detailing the inner channel width, 23mm central fin length, and overall profile height with lateral stabilising rails, engineered specifically for precise replacement on 8-10mm thick glass.

8–10mm Glass Shower Door Bottom Seal – 23mm Fin | V810S2023

£14.88
£20.88 £14.88
Cross-section view of the S810DTL universal bottom seal fitted on thick glass, illustrating its adaptive U-channel design that securely grips 8mm, 9mm, and 10mm panels while side fins ensure a zero-gap finish.Technical dimension chart of the S810DTL heavy-duty strip, detailing the flexible inner width range for 8-10mm glass and the 3-5mm side fin extension to bridge varying floor gaps universally.

8–10mm Heavy-Duty Side-Fin Shower Door Bottom Seal – 3–5mm Gap | S810DTL

£14.88
£20.88 £14.88
Profile view of the S810DTL-N bottom sweep fitted on 8-10mm glass, illustrating the extended single-side fin designed to bridge approximately 10mm floor gaps for versatile shower configurations.Technical dimension diagram of the S810DTL-N strip, specifying the adaptive 8-10mm inner channel and the 10mm extended fin length intended to cover wider floor irregularities in diverse bathroom setups.

8–10mm Glass Shower Door Bottom Seal – Side Fin 10mm Gap SL810DTL-N

From £3.60
£20.88 From £3.60
Close-up cross-section of the SL810DTL bathroom shower door bottom seal fitted on 8-10mm glass, showcasing the transparent PVC U-channel with a unique combination of a hard side rail and soft fin, engineered to cover larger floor gaps of 5-8mm.Technical dimension diagram for the best shower door bottom seal, detailing the inner channel width, adjustable gap coverage of 5-8mm, hard rail height, and overall profile dimensions, suitable for heavy-duty sliding doors with 8-10mm thick glass.

8-10mm Heavy-Duty Shower Sliding Door Bottom Seal Gap 5-8mm SL810DTL

From £3.59
£20.88 From £3.59
Installed profile of the S10DTL extra-thick 10mm shower bottom gasket, demonstrating its high-load gripping power on heavyweight glass and the precise alignment of side fins for a universal zero-gap fit.Engineering diagram of the S10DTL 10mm zero-gap strip, specifying the reinforced inner channel width and extended fin dimensions designed to accommodate the tolerance of premium thick glass installations.

10mm Glass Gasket Side-Fin Shower Door Bottom Seal | S10DTL

£14.88
£20.88 £14.88
Profile view of the VB10 bottom seal fitted on 10mm glass, illustrating the deep U-channel grip for thick panels and the extended twin fins designed to bridge gaps between 7mm and 9mm on shower thresholds.Technical dimension diagram of the VB10 strip, specifying the dedicated 10mm inner channel and the fin length calibrated to cover floor variations ranging from 7mm to 9mm effectively.

10mm Glass Double-Fin Shower Door Bottom Seal – 9mm Fin | VB10

£14.88
£20.88 £14.88
D08S7 vertical shower door bubble seal for 8mm glassClear PVC bubble seal for 8mm glass shower door edges

Vertical Bubble Shower Door Seal for 8mm Glass – 7mm Gap D08S7

£29.99
£35.99 £29.99
Profile view of the VC8 offset bottom seal mounted on 8mm glass, featuring the asymmetric transparent U-channel with a stabilising triangular side rail and a 15mm fin designed to cover floor gaps between 12mm and 15mm."Technical dimension diagram of the VC8 strip, indicating the precise 8mm inner channel width, 15mm fin length, and its intended coverage for shower base separations ranging from 12mm to 15mm."

8mm Offset Edge Shower Bottom Seal Fin 15mm VC8

£14.88
£20.88 £14.88

Buy the Right Seal First Time

Send us your measurements and a photo for help choosing.

Quality Checked Before Dispatch

Every bottom seal is checked before shipment.

Free Next Day UK Delivery

Fast delivery across the UK.

Manufacturer Since 1998

Experienced shower seal production.

Factory-Direct Bottom Shower Door Seals Since 1998

Since 1998, SIMBA has specialised in shower door seal manufacturing. Our factory-direct supply helps us control profile shape, material flexibility and replacement support for leaking shower screens.

Bottom seals can look similar online, but small differences in glass thickness, fin length, seal height, and gap size can affect the fit.

Not sure which bottom seal fits? Send us your glass thickness, gap size and a photo of your old seal. We’ll help you choose the best match before you order.

Send Us a Photo
Seal Selection Guide

How to Choose the Right Shower Door Bottom Seal

Choose in this order: glass thickness first, then the gap under the glass, then the seal profile or door type.

Choose by Glass Thickness

  • 4–6mm glass For thinner shower screens and many bath screen setups.
  • 8–10mm glass For thicker frameless, pivot and hinged shower doors.
  • 12mm glass Used for thicker or specialist glass panels.

Choose by Bottom Gap

Measure with the door closed, from the bottom of the glass to the tray or floor. If the gap varies, use the larger measurement.

No gap Under 9mm 9–12mm 13–16mm 17–20mm 20mm+

Small gaps usually need a shorter fin. Larger or uneven gaps may need a longer flexible fin or side-fin profile.

Choose by Door Type

Still unsure? Send us a photo before ordering.
Measuring Guide

How to Measure Before Ordering

1

Measure glass thickness

Measure the exposed glass edge with a ruler or caliper. Common UK sizes include 4mm, 5mm, 6mm, 8mm and 10mm.

2

Measure the bottom gap

Close the door and measure from the bottom of the glass to the tray or floor. If the gap is different at each end, use the larger measurement.

?

Need more detail?

Read our full shower screen seal measuring guide

Not sure which bottom shower seal you need?

If your shower door is old, has no model number, or the original bottom seal is no longer available, send us photos before ordering.

We’ll check the seal profile, glass thickness and fitting position to help you find the closest suitable replacement.

Find a Seal for an Old Shower Door
Shop Replacement Shower Door Bottom Seals

How Our Bottom Shower Door Seals Help Stop Leaks

A bottom shower door seal fits along the lower edge of the glass to help guide water back into the shower tray. Depending on the design, it may use a flexible fin, sweep or drip profile to improve the seal at the base of your shower screen.

For the best fit, choose a seal that matches your glass thickness, the gap under the glass and the way your door opens. If the fin is too short, water may still escape. If it is too long, it may drag on the tray or stop the door from closing smoothly.

Most bottom shower door seals can be trimmed to length and pushed onto the glass without glue, making them a simple replacement for worn, cracked or leaking shower screen seals. All our bottom shower door seals are quality checked before dispatch, so you can choose a clean, reliable replacement with confidence.

⭐ Customer Reviews for Shower Door Bottom Seals

Brilliant service and product

Thank you very much for tending with detailed attention and professionalism to the little issues/hiccups throughout this delivery process. Much appreciated.

Stephane B.

Brilliant service - so impressed.

This has been a fantastic service in a Sunday. Simba advice and recommendation has been excellent (a Sunday). Huge thanks

Jeremy F.

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.

Gerry K.

RELATED GUIDES

Related Guides for Shower Door Bottom Seals

Practical advice to help you choose, install, and maintain the right seal for your shower door.

Uneven Shower Door Gap? Here’s How to Fix It

If your seal doesn’t sit evenly, standard options may not work. Learn how to fix uneven gaps and choose a better-fitting solution.

Fix uneven gaps →

Complete Guide to Shower Door Bottom Seals

A full overview of seal types, sizes, and how to choose the right fit for your shower setup.

Read guide →

Why Is My Shower Door Leaking at the Bottom?

Understand the common causes of leaks and how to stop water escaping onto your bathroom floor.

Fix leaks →

How to Replace a Shower Door Bottom Seal

A simple step-by-step guide to removing your old seal and fitting a new one properly.

See steps →

Single Fin vs Double Fin Shower Seals

Compare different designs and find out which works best for your water pressure and gap size.

Compare →
FAQ

Frequently Asked Questions

1. How do I choose the right bottom shower door seal?

Start with two measurements: your glass thickness and the gap under the glass. Then compare the side profile of your old seal with the product images. A small difference in channel width, fin length, or seal shape can affect the fit.

If you are unsure, send us a photo of your old seal, glass edge, or leaking area before ordering.

2. What is the best bottom shower door seal to prevent leaks?

The best option depends on where the water is escaping. For most pivot and frameless shower doors, a flexible fin or drip rail bottom seal is usually the first option to check. For very small gaps, choose a slim side-fin or adhesive threshold seal. For sliding doors, check track clearance before fitting a bottom side-fin seal.

For more severe leaks, combining a bottom seal with a D510 water deflector or PV29 shower threshold seal can provide extra protection. You can also check our shower door leaking solutions guide.

3. What is the rubber strip at the bottom of a shower door called?
It is usually called a shower door bottom seal, bottom shower seal, shower screen bottom seal, bottom sweep, or shower door gasket. These seals fit along the bottom edge of the glass to help reduce water escaping onto the bathroom floor.
4. Why is my bottom shower seal still leaking?

A bottom shower door seal may still leak if the seal type does not match your door, the fin is too short, the bottom gap is uneven, or the shower door is not aligned correctly. In some installations, a bottom seal alone may not be enough, especially if there is no threshold strip to help contain and redirect water.

Before choosing a replacement, measure the gap under the glass, compare the side profile of your old seal, and check whether your shower setup needs both a bottom seal and a threshold strip.

5. Are bottom shower door seals universal?
No. Bottom shower door seals are not fully universal. They vary by glass thickness, channel shape, fin length, gap coverage, and door type. A seal that looks similar online may still be too loose, too tight, too short, or too long for your shower door.
6. What makes SIMBA bottom shower door seals different?

SIMBA has specialised in shower door seal manufacturing since 1998. Our factory-direct supply chain gives us better control over profile accuracy, material flexibility, and replacement support.

We also help customers identify hard-to-match seals from photos, especially for older shower screens or discontinued shower door profiles.

7. Do I need to order a sample first?

In most cases, no. Shower door bottom seals are chosen by glass thickness, gap size and profile shape.

If you are unsure, send us a photo of your current seal along with your measurements, and we’ll help you choose the closest suitable replacement before you place your order.