The U-Pol ISOPON® FASTGLAS is a polyester resin kit, containing resin, hardener, glass fibre, mixing cup, and plastic gloves. It has been developed for the repair of holes, splits, cracks and tears in most materials including metal, wood, hard plastic, bricks etc. Can also be used as a construction material to manufacture storage tanks etc. Offers perfect adhesion to most surfaces and is a solid base for most paint systems.U-Pol ISOPON® FASTGLAS Resin & Glass Fibre Kit Large.