← Back to How to repair a crack in a resin sink?


If you’ve spotted a crack in your resin sink, you may be wondering if it’s possible to fix it yourself without calling in a professional. Many resin sink cracks can indeed be repaired at home with a few specialised products and a little patience.
What You’ll Need for Home Repairs
To repair a resin sink at home, you’ll need a product that provides both a strong bond and water resistance. Kits such as the Resin Fibreglass Repair Kit – Complete Polyester Resin and Hardener Set are ideal, as they combine polyester resin, hardener, and fibreglass matting for durable results. Alternatively, a fibreglass-reinforced putty or fast-setting epoxy glue may suit narrow cracks or spot repairs. Always ensure the repair material is suitable for rigid plastics and sinks.


Step-by-Step: Repairing Your Resin Sink
- Clean the cracked area thoroughly and let it dry before repair. Remove any loose debris around the crack.
- Mix your chosen repair resin, putty, or epoxy according to product instructions for proper curing.
- Apply the compound to the crack, allowing it to fill the gap and bond securely to the surrounding material.
- If using a fibreglass mat, press it over the repair zone as directed for structural reinforcement.
- Allow to cure fully. Once set, sand it smooth and optionally prime and paint to match your sink.
Take your time throughout. Most high-quality kits contain gloves and mixing tools for user safety and ease.
When Should At-Home Repairs Be Considered?
DIY repairs are best for minor surface cracks or localised damage. If a sink displays widespread structural weakness or extensive splitting, replacement or professional assessment is recommended. For a typical hairline crack or chip, though, using a specialist fibreglass or epoxy repair kit can restore function and lifespan effectively.

Related products
Related guides
With the correct product and method, at-home resin sink repairs are achievable for most DIYers. For extra support and further repair tips, visit our main guide on resin sink crack repair.
Google