Looking for a quick vertical shower door seal replacement guide?
We’ll walk you through when, why, and how to replace your vertical seal to keep your bathroom clean, dry, and leak-free.
*Note: This guide also applies to magnetic shower seals.
What is a Vertical Shower Door Seal?
Often called a side shower door seal, it is a precision PVC strip designed to bridge the gap between glass and wall, or between two glass panels.
Whether for pivot doors or sliding systems, a high-quality vertical glass seal is your most cost-effective defence against persistent bathroom leaks.
| Feature | Magnetic Seals | Side Seal Strips |
|---|---|---|
| Best For | Double doors | Glass-to-wall/Double doors |
| Mechanism | Snap-shut magnets | Flexible soft fins |
| Installation | Slide-on PVC | Slide-on trimmable |
When to Replace Your Seal?
Worn seals are the #1 cause of leaks. Look for these key signs:
- Visible Damage: Cracking or hardening of the PVC.
- Discolouration: Yellowing or stubborn limescale.
- Poor Fit: Seal no longer stays snug on the glass.
- Leaks: Water escaping during use.
Step-by-Step Replacement Guide
Replacing your seal is a simple DIY task. Check out our orientation quick guide before starting.
Step 1: Remove the Old Seal
Peel it away gently from top to bottom. If it's old and mouldy, it should slide off easily.
Step 2: Clean the Glass
Wipe the glass edge with alcohol or clean water. A clean surface ensures a longer-lasting seal.
Step 3: Measure and Cut
Check the glass height and cut your new seal. Need pro tips? See our How to Cut Guide.
Step 4: The SIMBA Pro Install Method
a. Steady the glass with one hand.
b. The Hook Trick: Hook one edge of the seal onto the glass first. Let the glass gently "stretch" open the U-channel—this makes sliding it on much smoother.
c. Press the seal in bit by bit from top to bottom.
⚠️ Avoid using a hairdryer; heat can damage the rigid U-channel and ruin the seal.
Is it Properly Fitted?
Give it a firm tug. If it requires significant force (approx. 50N) to move, you have a perfect fit. If it's loose, you may need a different glass thickness size.
Watch: Installation in Action
Small Fix, Big Upgrade
Simply know your glass thickness and gap size to pick your perfect match.
Ready to fix that leak? Visit our site: showerdoorseal.uk