Cromar Pro GRP Top Coat Hardener Catalyst is a high-quality, professional-grade product designed for use in the construction and repair of fibreglass roof systems. This 5kg hardener catalyst utilises advanced technology to provide superior bonding and curing characteristics. Its perfect for improving the durability and longevity of your GRP (Glass Reinforced Plastic) structures, ensuring your projects stand the test of time. Easy to apply and fast-acting, this Cromar Pro product is a pivotal component in successful fibreglass roofing applications.