How to Replace a Rubber Gasket for Shower Door in 5 Easy Steps

If your shower door is leaking or allowing water to escape, it might be time to check the gasket. The rubber gasket for shower door plays a vital role in maintaining a watertight seal. Over time, it can crack, harden, or come loose — all of which can lead to leaks, mould, and general wear on your bathroom.

Fortunately, replacing a rubber gasket is a straightforward DIY job. In this guide, we’ll walk you through five simple steps to remove your old gasket and install a new one — ensuring your shower stays sealed and splash-free.

Why the Rubber Gasket for Shower Door Matters

The rubber gasket (also referred to as a shower door seal) prevents water from escaping the enclosed shower space. It sits between the door and the frame or along the bottom where water is most likely to run. A faulty or worn-out gasket can cause:

  • Pooled water on your bathroom floor
  • Damage to nearby flooring and walls
  • Increased mould and mildew
  • Unpleasant odours
  • Reduced heat retention inside the shower

Upgrading to a silicone gasket for bathroom use ensures durability, flexibility, and water resistance.

When Should You Replace Your Rubber Gasket for Shower Door?

You may need a new rubber gasket for shower door if:

  • The current seal is cracked or discoloured
  • It feels stiff, brittle, or loose
  • There’s visible mould inside the gasket
  • You notice consistent water leaks after showering
  • It’s been more than 3–5 years since last replacement

Rubber Gasket for Shower Door: What You’ll Need

Before getting started, gather the following:

  • Replacement rubber or silicone gasket
  • Scissors or utility knife
  • Cleaning cloth and mild detergent
  • Measuring tape
  • Optional: silicone-safe adhesive (depending on seal type)

Looking for a high-quality UK-made option? Visit our page for silicone rubber gaskets for trusted, durable sealing solutions.

5 Easy Steps to Replace a Rubber Gasket for Shower Door

Step 1: Remove the Old Gasket

  • Open the shower door fully
  • Gently pull the existing gasket away from the glass or frame
  • Use pliers if the seal is stuck or has become hardened
  • Dispose of the old gasket responsibly

Tip: Clean the area immediately after removal to remove any debris, limescale, or mould.

Step 2: Clean and Dry the Area

Use a cloth and warm water with mild soap to:

  • Clean the edge of the door or frame where the gasket was
  • Remove any adhesive residue
  • Dry thoroughly with a towel or let air-dry before installing the new seal

Step 3: Measure and Cut the New Gasket

  • Measure the length of the door edge or channel
  • Mark and cut your new gasket using scissors or a utility blade
  • Ensure a snug fit — not too tight or too loose

Most rubber seal strips for glass doors are easily trimmable and fit a range of shower configurations.

Step 4: Fit the New Gasket

  • Line up the new gasket with the door edge
  • Gently press or slide it into place — depending on the profile design
  • If using adhesive-backed seals, remove the strip and press firmly along the surface

Tip: Start from one end and work your way across for an even fit.

Step 5: Test and Adjust

  • Close the shower door and check for gaps
  • Run a small stream of water along the door edge to ensure no leaks
  • Make slight adjustments if necessary for a better seal

If properly installed, the durable shower door gasket should stay firmly in place and stop water from leaking.

Benefits of A Silicone Rubber Gasket for Shower Door

Choosing a silicone rubber gasket over basic plastic or PVC alternatives comes with several advantages:

  • Mould-resistant
  • Long-lasting (3–5+ years)
  • More flexible for curved enclosures
  • Easy to clean
  • Withstands daily moisture and heat

Perfect for bathroom waterproofing solutions in both residential and commercial applications.

Need a Custom Rubber Gasket in the UK?

At Silco Products, we manufacture and supply custom rubber gaskets right here in the UK — tailored to your specific measurements and performance needs. Whether you’re replacing a shower door seal or working on a larger bathroom renovation, we’ve got you covered.

Browse our selection here: https://siliconerubberproducts.co.uk/silicone-rubber-gaskets/

Tired of dealing with a leaking or mouldy shower door? Upgrade to a high-performance rubber gasket for shower door from Silco Products.

Phone: 01903 732088
Email: sales@silcoproducts.co.uk

Contact our expert team for custom sizing, bulk orders, or technical advice.

Rubber Gasket for Shower Door FAQs

Q1: Can I replace a shower door gasket myself?
A1: Yes. Most rubber gaskets are designed for simple, tool-free installation — perfect for DIY replacements in under 30 minutes.

Q2: How do I know what size gasket I need?
A2: Measure the thickness of the glass and the length of the door edge. If unsure, contact a UK supplier like Silco Products for guidance.

Q3: Are rubber gaskets better than plastic seals?
A3: Yes. Rubber and silicone gaskets are more flexible, long-lasting, and mould-resistant — ideal for wet environments like bathrooms.