Shower Door Bottom Seals

Finding the perfect shower door bottom seal depends on two critical measurements:

1. Glass Thickness 4-6mm or 8-10mm
2. Floor Gap 0mm up to 35mm

✨ We have a "problem solver" seal for you.

Verify Durability

Don't settle for brittle plastic. Our seals are certified for 30,000-cycle and freeze-tested at -39.5°C to prevent winter cracking.

👉 See the Independent Lab Test Results
10-Month Warranty
Special for UK hard water
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74 products

UH456 U-shape shower screen edge protector fitted on 4-6mm glass showing a secure no-gap fit for safety and water containment in UK bathrooms.Technical dimensions diagram of UH456 U-channel glass guard, specifically designed to clamp tightly onto 4mm to 6mm thick shower screen panels without adhesive.

U-Shape Shower Screen Edge Protector 4-6mm Glass No-gap UH456

£14.88
£20.88 £14.88
UH810 U-shape shower screen edge protector securely fitted on 8-10mm thick glass, demonstrating a tight no-gap seal for enhanced safety in modern UK bathrooms.Detailed dimension diagram of the UH810 U-channel glass guard, engineered with a precise inner width to clamp firmly onto 8mm to 10mm shower screen panels without slipping.

U-Shape Shower Screen Edge Protector 8-10mm Glass UH810

£14.88
£20.88 £14.88
S08 8mm sliding shower door brush seal featuring a transparent U-channel grip and dense black soft bristles for effective water and draft protection on UK glass screens.Technical cross-section diagram of the S08 brush seal showing precise 8mm inner width designed to clamp tightly onto sliding shower door panels without adhesive.

8mm Sliding Shower Door Brush Seal Replacement S08

£29.88
£38.70 £29.88
Cross-section view of the S10 luxury 10mm shower door brush seal installed on glass, showing the precise fit of the clear U-channel and soft black bristles for a seamless frameless look.Detailed dimension diagram of the S10 10mm glass brush seal, illustrating exact measurements for inner width, bristle length, and channel depth to ensure perfect compatibility with thick shower screens.

Luxury Frameless 10mm Shower Door Brush Seal S10

£29.88
£38.70 £29.88
Cross-section view of the S12 heavy-duty 12mm shower door brush seal installed on thick glass, demonstrating the secure grip of the clear U-channel and effective black bristle barrier.Detailed technical dimension diagram of the S12 12mm glass brush seal, specifying exact inner width, bristle height, and channel thickness to ensure a perfect fit for heavy frameless enclosures.

12mm Glass Shower Door Seal With Brush S12

£29.88
£38.70 £29.88
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 Gasket | Zero-Gap Bottom Seal | Slimline Strip S456DTL

£14.88
£20.88 £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 | Zero-Gap Bottom Seal | Slimline Strip S8DTL

£14.88
£20.88 £14.88
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 | Zero-Gap Bottom Seal | Slimline Strip S10DTL

£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 Shower Sliding Door Bottom Seal Gap 3-5mm S810DTL

£14.88
£20.88 £14.88
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
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 Sweep 10mm Gap S810DTL-N

£14.88
£20.88 £14.88
Profile view of the S312DTL7 self-adhesive bottom seal, illustrating the transparent PVC body with an integrated adhesive backing and extended side fins, designed for surface application on glass panels.Technical dimension diagram of the S312DTL7 strip, specifying the adhesive contact width, material thickness, and fin length intended to provide coverage while accommodating various bottom hardware positions.

Self-Adhesive Sliding Bath Shower Glass Extending Fin Seals Replacement S312DTL7

£14.88
£20.88 £14.88
Profile view of the D456S7 bulb seal fitted on 4-6mm glass, illustrating the transparent U-channel grip and the soft, compressible bulb top designed to accommodate surface irregularities in bottom or side positions.Technical dimension diagram of the D456S7 strip, specifying the 4-6mm inner channel range and the bulb height intended to bridge gaps up to 7mm, suitable for diverse sealing requirements on sides or bottoms.

4-6mm Glass Bulb Seals Gap 7mm D456S7

From £14.88
£21.00 From £14.88
Profile view of the D456S12 bulb seal fitted on 4-6mm glass, illustrating the transparent U-channel grip and the elongated soft bulb designed to bridge wide gaps up to 12mm in bottom or side applications.Technical dimension diagram of the D456S12 strip, specifying the 4-6mm inner channel range and the extended bulb height intended to accommodate gap variations between 8mm and 12mm for diverse sealing needs

4-6mm Glass Bulb Seals Gap 8-12mm 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.

Shower Door Vertical Bubble Seal & Fin 4-6mm Glass Gap 15mm DA456S15

From £14.88
£21.00 From £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 rubber strip bottom of shower door VB456

£14.88
£43.19 £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 2 Fin Shower Bottom Seal VB08

£14.88
£43.19 £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 Bottom Seal 7-9mm Gap VB10

£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 Edge Shower Bottom Seal VC456

£14.88
£20.88 £14.88
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
Profile view of the VC10 heavy-duty offset seal fitted on 10mm glass, displaying the asymmetric U-channel with a side guide rail and an off-centre single fin positioned to bridge wide floor gaps between 16mm and 18mm.Technical dimension diagram of the VC10 strip, specifying the robust 10mm inner channel, the 18mm fin length extending from the offset edge, and the effective sealing range for 16–18mm base separations.

10mm Glass Heavy-Duty Offset Edge Shower Bottom Seal VC10

£14.88
£20.88 £14.88
"Profile view of the V456S12 bottom seal fitted on 4–6mm glass, showing the transparent U-channel with integrated side guide rail and a centrally positioned 12mm fin for consistent sealing on standard shower thresholds." "Technical dimension diagram of the V456S12 strip, detailing the 4–6mm inner channel width, central 12mm fin length, and precise measurements of the side guide rail and base profile for accurate installation."

4-6mm Glass Bottom Seal With 12mm Fin V456S12

£14.88
£20.88 £14.88
"Profile view of the V456S16 bottom seal mounted on 4–6mm glass, featuring a symmetrical transparent U-channel with side guide rails and an extended central 16mm fin for enhanced water containment.""Technical dimension diagram of the V456S16 strip, specifying the 4–6mm channel width, the full 16mm length of the centrally positioned fin, and precise profile measurements for accurate fitting."

4-6mm Glass 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
SIMBA bottom sealing strip compared to other brands' sealing strips

Why SIMBA Gasket Last Longer

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

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

Detailed Selection & Measurement Guide

FAQ for Shower Door Bottom Seals

  • How do I determine the right type of bottom seal for my shower enclosure?

    Based on your glass thickness (4-6mm/8-10mm) and shower type (sliding door/pivot door/curved door), we provide a precise matching guide. Simply select "Glass Thickness" in the left-hand filter on our product page, and our system will automatically recommend the most suitable SIMBA series to ensure a perfect seal.

  • Why are SIMBA seals particularly suitable for UK hard water areas?

    SIMBA bottom seals use a REACH-certified specialised formula with hard water inhibitors and anti-mould stabilisers, which effectively reduce limescale buildup and seal failure. This is a UK-specific solution developed for British water conditions, ensuring a lifespan of 3-5 years or more in hard water areas like London, where standard retail products typically fall short.

  • SIMBA seals cost 20% more than standard retail products—what additional value does this provide?

    The 20% premium delivers up to three times the lifespan of standard products: SIMBA seals undergo 30,000 opening/closing tests (equivalent to 10 years of regular use) and use co-extrusion technology with UV inhibitors. In practical terms, this means an extra 0.5p per day investment could save you over £500 annually in potential water damage and floor repair costs.

  • Does SIMBA offer replacement if I select the wrong seal size?

    We provide a hassle-free replacement guarantee: if installation issues arise from selecting the wrong size within 30 days of purchase, we'll replace it free of charge. Simply share your measurements, and our customer service team will recommend the most appropriate alternative, ensuring your sealing issue is resolved in one go.

  • Which UK regions are covered by SIMBA's "Free Next-Day Delivery"?

    We offer 24-hour dispatch for all UK mainland orders, covering England, Wales, and major Scottish cities. For London and surrounding areas, orders placed before 2pm on weekdays qualify for same-day delivery, helping you address leaks without unnecessary delays.

  • What specific issues does the SIMBA warranty cover?

    Our warranty covers material degradation, cracking, discolouration, and seal failure. Provided the product is installed according to our guidelines, any issues arising from product quality will be addressed with a free replacement. While the warranty does not cover accidental damage or incorrect installation, our technical support team is always available to assist.

  • Why is SIMBA referred to as the "UK Shower Seal Expert"?

    We specialise in solving UK-specific hard water challenges, with formulations developed specifically for British water conditions. Having installed over 10,000 sealing systems across the UK, our products are tested in Manchester under simulated UK bathroom environments, ensuring they perform reliably in the high humidity and water conditions typical of British homes.

  • How does SIMBA address hard water-related seal aging in London?

    Our HardWater Shield technology incorporates specially formulated anti-limescale stabilisers into the PVC material. Feedback from London users indicates that SIMBA seals reduce black mould and limescale issues by 70%, extending product life by 3-5 years compared to standard products, making them particularly well-suited for London's hard water conditions.

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.

Mr. D Curd

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!!!

Daniel 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 Keenan

March 24, 2025

The UK’s Hub for Straight &
Universal Shower Seal Manufacturing

As a dedicated factory-direct source, SIMBA UK specialises in the high-volume production of straight shower door bottom seals. While curved doors have their own challenges, straight glass panels require maximum Vertical Water Deflection.

Our straight profiles are engineered with rigid spines to ensure a "locked-on" fit that never slides, providing a permanent solution for the 99% of UK square and rectangular enclosures.

Precision Engineering

Standard & Double-Fin Profiles

Engineered to push heavy water spray back into the tray—perfect for power showers where standard seals fail under pressure.

Most Versatile

The 35mm "Any-Gap" Barrier

Our most versatile straight seal, designed to fit any glass thickness (3mm to 12mm), making it the ideal choice when original specifications are unknown.

S6DTL Minimalist Gaskets

Ultra-sleek, professional-grade designs for modern, zero-clearance wet rooms.

Why Trade Professionals Choose SIMBA Straight Seals?

Unlike curved shower screen seals which deal with radial tension, our straight seals are built for long-term friction resistance.

✓

Zero-Chatter Tech: Glide smoothly over tray surfaces without the "chattering" or dragging noise.

✓

Industrial-Grade PVC: Direct from the SIMBA factory, using UV-stable materials that maintain crystal clarity in any light.

✓

British Standard Fit: Designed for the 99% of UK square and rectangular enclosures.

Direct From Factory Free UK Shipping 9,000+ Size Variations