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If you’ve noticed cracks forming in your resin shower tray, a simple glue repair may not provide enduring strength or water protection. Identifying when to use fibreglass reinforcement can make all the difference for a robust, long-lasting fix.
Why Use Fibreglass for Shower Tray Cracks?
Cracks and significant gaps in a resin shower tray aren’t just cosmetic—they may compromise waterproofing and even structural stability. Fibreglass reinforcement, applied with a compatible polyester resin, forms a bridge across damaged areas, restoring structural integrity and helping to prevent water ingress. This is especially important for cracks that extend through the tray or where flexing may occur.
Step-by-Step Repair Guidance
- Clean & prep: Remove loose fragments and debris; dry the area fully.
- Mix and apply: Use a complete kit such as the Resin Fibreglass Repair Kit, mixing polyester resin with its hardener.
- Layering: Lay the fibreglass mat over the cracked area, saturate with resin, and smooth out air bubbles.
- Cure and finish: Let the repair set thoroughly before sanding and finishing as needed. For surface finishing or further strengthening, a fast-setting epoxy glue may be used after fibreglassing.
When Is Fibreglass Essential?
If the crack is deep, extends right through, or if the tray flexes underfoot, fibreglass is highly recommended. It’s also important for repairs in areas constantly exposed to water or where a durable, impact-resistant solution is required. Shallow hairline cracks may sometimes be treated with a strong two-component epoxy glue, but for reliability, fibreglass is the safer bet.
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Effective repair with fibreglass reinforcement strengthens your shower tray and guards against leaks. For more in-depth advice on tray adhesives and proper installation, refer to our main guide on gluing resin shower trays.