Fibreglass repairs offer an efficient solution for many damaged surface areas, with its main attributes making it suitable for this use being structural regeneration (tensile strength, stiffness, flexural strength), impermeability to water and chemicals as well as aesthetics.To achieve a successful repair with fibreglass, it is critical that damage is properly assessed and the appropriate materials utilized. Furthermore, environmental conditions should also be taken into consideration as this will impact resin application as well as long-term performance of repaired surfaces.Once a crack has been identified, the initial step should be to drill two small holes at either end to stop its propagation further. Pattern & Mould Making Next, the crack should be carefully inspected and cleaned with an acetone-soaked rag; any contamination should then be thoroughly eliminated with an epoxy resin injection product before being filled in with good-quality fiberglass resin epoxy resin.Next step in CSM repair involves the preparation of fibreglass mat (CSM). CSM may either be pre-soaked in resin prior to application (messy and wasteful but sometimes necessary in difficult-to-reach places), or applied dry and then soaked later with resin. In either instance it's important to ensure no air bubbles exist within the mixed resin as this could compromise bonding integrity and lead to poor structural integrity of repair work.