Skip to product information
1 of 6

H Shape Seal 4-6mm Glass H456S20

Regular price £3.48
Regular price £7.19 Sale price £3.48
Sold out
-52%
Taxes included. Shipping calculated at checkout.
Lengths: Sample 100mm
Gap: Seal 3-18mm

100% Guaranteed Safe Checkout

  • American Express
  • Diners Club
  • Discover
  • JCB
  • Maestro
  • Mastercard
  • Union Pay
  • Visa

Description

Caret Down

Product Overview: H456S20

This extra-long h-type seal features a soft 20mm fin, making it the ideal choice for larger gaps between 3mm and 18mm.

Quick Specs: 2000mm Length | Sold as a Single Strip

Technical Specifications

Catalog No. H456S20
Glass Fits 4mm / 5mm / 6mm
Gap Coverage 3mm – 18mm
Best For 180° Hinged Doors
Warranty 10 Months Peace of Mind

Frequently Asked Questions

Will this seal look professional after fitting?
Absolutely. It is made from Ultra-Clear PVC that stays transparent and resists yellowing, ensuring it blends seamlessly with your bathroom interior.
Is it suitable for my glass thickness?
This seal is designed for 4mm, 5mm, and 6mm thick glass. It uses a simple push-fit system—no glue, silicone, or tape required.
How durable is the seal?
Built for daily family use, this seal has been cycle-tested over 30,000 times to ensure long-lasting performance and flexibility.
How do I install and trim it?
Installation takes less than 5 minutes:
1. Trim to size with heavy-duty scissors or garden snips.
2. Remove your old seal.
3. Align and push the new seal onto the glass edge. (Please refer to the video above for a visual guide).
Is it compatible with curved glass?
No. This specific model is for straight glass only. If you have a curved enclosure, please browse our Curved Seal Collection.
Shipping and VAT Information
No hidden costs: The price includes VAT. We offer Free Standard Delivery to UK Mainland and a 30-day easy return policy.

Commonly used in UK standard quadrant enclosures.

Premium Sealing Solutions | SIMBA UK

Delivery & Shipping Information

Caret Down

We aim to dispatch all orders placed before 2 PM on the same day. Orders placed after 2 PM usually ship the next working day.

Important: Our automated system selects the best courier based on your address, order size, and quantity.

Delivery Summary

  • UK Mainland Standard: 2–3 working days (FREE).
  • Highlands, Islands & NI: 3–7 working days (Calculated at checkout).

A small surcharge applies to remote areas (Highlands/Islands/NI). This is clearly calculated when you enter your postcode.

If your order hasn't arrived within 5 working days (any service), please email us immediately at info@showerdoorseal.uk.

Compliance Information

Caret Down

Product Safety

Manufacturer Name: SIMBA International Limited

Address:No.25-2, Fuke North Road,

Luosong Village, Fusha Town,

Zhongshan, Guang Dong, China

Contact: support@glassseals.com

View full details
H Shape Seal 4-6mm Glass H456S20
H Shape Seal 4-6mm Glass H456S20
Caret Down

Simba Professional Care Guide

Ensure a perfect fit and a lifetime of clarity.

H Shape Seal 4-6mm Glass H456S20 Installation Guide - Simba Anti-Mould Shower Seal

DO’S

  • Direct Press: Fit by pressing directly onto the glass edge to protect the surface.
  • Deep Clean: Remove all UK hard-water limescale before installation.
  • Sharp Tools: Use garden pruners for a clean, professional finish.
  • Daily Rinse: Simply wash away soap suds after your shower.

DON’TS

  • No Sliding: Never slide the seal along the glass; this risks scratching.
  • No Extreme Heat: Avoid water >70°C or hair dryers to prevent warping.
  • No Soapy Water: Do not use lubricants—they accelerate mould growth.
  • No Harsh Chemicals: Avoid bleach or acidic cleaners on the seal.

Quality & Environmental Standards

Simba® seals are manufactured to the highest international standards, ensuring safety and sustainability for your home.

ISO 9001:2015 Quality Management

ISO 9001:2015

Premium quality control ensuring consistent product durability and precision fit.

ISO 14001:2015 Eco-Friendly

ISO 14001:2015

Manufactured with a commitment to environmental responsibility and eco-friendly processes.

SVHC REACH Compliant

SVHC / REACH

Certified non-toxic and safe for domestic use, free from harmful substances.

SIMBA shower screen seal, Premium Clarity. Flawless Fit.

Can’t Find the Right Seal?

As a leading manufacturer, SIMBA stocks over 9,000 styles. From vintage screens to modern doors, we’ve got you covered.

Stuck on which one to pick? Drop us a message. We’re here to help you get that perfect, water-tight fit!

We're the SIMBA makers, and we're always listening.

Since we design and make our own seals, we can actually do something about it.

If you spot anything that could be better—no matter how small—we’d genuinely love your feedback. Let’s make the next version perfect, together.