Last updated: 2025-10-28
Need a durable seal for your sliding shower door in UK?
Sliding shower doors move constantly, so their seals need regular replacement.
This guide will help you pick the right sliding shower door seal strip based on where it’s installed — side (vertical) or bottom.
Stop wasting money on the wrong seal — click here to shop now and enjoy SIMBA's perfect-fit guarantee.
I. Three Types of Sliding Shower Door Seals — Which One Do You Need?
For a sliding shower door to stay 100% leak-free, you need both bottom and side seals working together.
A. Shower door bottom seal
Purpose: Stops water from escaping under the glass.
Key Points When Choosing:
Watch the track: Sliding doors usually have a bottom track, so a standard drip rail seal might not fit properly.
See standard drip rail seal:
The fins on some shower bottom gaskets rub against the track and wear out quickly.
Our recommendation: SIM-0007
Designed to lift the drip lip away from the sliding track, allowing the door to move smoothly while maintaining a watertight seal underneath.
This prevents the fins from rubbing out and drastically extends lifespan.
2.Length matters: Check our bottom seal collection to find the perfect size for your door gap.
Special Offer: Don't wait for the leak to get worse. Click here to shop our bottom seals now and use code BOTTOMLAURA24 for 10% off at checkout.
B. Shower Vertical / Side Seal Strip
Vertical seals come in various forms (like F-Type, H-Type, and magnetic) and are fitted to the side edges of the glass.
F-Type side shower seals are the most common non-magnetic option for sliding doors, sitting where two glass panels meet or overlap.
Cheaper than magnetic seals but still fully watertight.
F-type seals are installed in pairs — one for each glass edge, just like in our images.
Purpose: Stops water from splashing between the vertical glass panels.
Choosing the Right Seal:
Measure your glass thickness or door gap carefully before buying.
Check our F-Type Sliding Shower Door Seals — covering 11–67mm gaps, for 4–10mm glass.
C. Magnetic Seal Strip
Purpose: Makes sure your sliding doors close tightly and adds extra watertight protection.
What to Watch For:
Magnetic seals are a special type of vertical/side seal, so a few things matter:
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Angle: Sliding doors usually need a flat 180° magnetic strip so the two doors attract each other perfectly.
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Polarity: Extremely important! Make sure the new seal's poles match your old one — opposite poles attract, same poles repel.
- Gap Size Tip: UK standard 180° sliding doors have a gap of around 22mm.
Your magnetic seal must cover at least your actual gap.
Example: If your door gap is 19mm, pick any magnetic seal with a gap greater than 19mm.
Never pick a seal smaller than your door gap — even 18mm won’t fit properly.
💸 Special Offer: Use code DRYHOME10 for 10% off your magnetic shower seal purchase.
II. Key Measurements Before Buying (Avoid Wasting £££)
SIMBA Tip: 90% of returns happen because of wrong measurements. Follow these three steps carefully:
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Glass Thickness: Measure the exact thickness with a ruler or caliper.
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Bottom Gap: Measure from the bottom of the glass to the highest edge of your shower tray. This tells you the minimum drip lip length you need.
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Magnet Polarity: Replacing a magnetic strip? Test your old magnet with a fridge magnet — does it attract or repel? Make sure the new strip matches the other door’s polarity.
Shop now based on your measurements and our tips: Sliding door seal collection
III. Why Choose Us?
We don’t just sell seals — we deliver professional solutions backed by tens of thousands of UK installations.
🇬🇧 Experience & Trust
- 20+ years of expertise: SIMBA knows how UK showers age — hard water, popular brands like Aqualux, Homebase, Bunnings.
- 10,000+ success stories: Over 10,000 UK households have upgraded their sliding door seals with us.
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Fit Guarantee: 30-day hassle-free returns — if it doesn’t fit, we replace it for free.
💯 Certified Materials
- UV & mould resistant: Made from co-extruded PVC that resists sunlight and mould.
- Durability tested: Over 30,000 open/close cycles — 50% longer lifespan than standard seals.
🎥 Free Video Tutorial: Learn how to cut and fit bottom and side seals like a pro: Watch Now
Conclusion
Fixing sliding door leaks requires the perfect combo of bottom, vertical, and magnetic seals. Measure carefully and choose durable, professional-grade products.
Pick SIMBA and enjoy a drip-free shower! Shop Your Sliding Door Seals Now
This article was edited by Laura.
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Author: Laura Liu Content Manager & Seal Expert Laura has over 7 years of experience in the shower sealing industry and is part of SIMBA’s expert team handling thousands of customer cases. |