How to Fix Fiberglass – Repair Guide for GRP Laminates

PrimeMat publishes a step-by-step guide to repairing fiberglass laminates: assessing delamination and star cracks, grinding back the damaged area, cutting the right mat for the repair, wetting out chopped strand mat without air voids, and finishing with gelcoat or surface tissue. The guide also covers the mat weights used for small hole repairs versus larger structural patches, and how repair layers bond to the original laminate. PrimeMat CSM Fiberglass Mat manufactures chopped strand mat, continuous filament mat, combo mat and surface tissue for FRP fabricators and repair shops