Can I use polyester resin for polycarbonate leak repairs?

How Polyester Resin Works for Polycarbonate Repairs

Polyester resin, when reinforced with fibreglass mat or cloth, bonds well to rigid polycarbonate. This combination forms a durable, waterproof layer that effectively seals leaks. The fibreglass mat provides strength while the resin forms the impermeable barrier needed for watertight repairs.

For the most robust results, surfaces should be clean, dry, and lightly abraded to enhance adhesion. Always use the resin and hardener in the recommended ratios to ensure proper curing.

Choosing and Using the Right Repair Kit

Kits such as the Resin Fibreglass Repair Kit – Complete Polyester Resin and Hardener Set include everything you need for these repairs: polyester resin, hardener, fibreglass mat, gloves, and mixing tools. Follow the step-by-step instructions provided in the kit to lay down the fibreglass and apply the resin evenly. After curing, the repair area can usually be sanded and painted as required.

When This Matters

Using polyester resin and fibreglass is especially valuable when you need quick, sturdy, and waterproof repairs on rigid polycarbonate. This method is commonly chosen for emergency patching of tanks, roofing sheets, pools, and similar structures.