The Cromar Pro GRP Top Coat Hardener Catalyst is an essential component in a range of construction and repair projects. This high-quality 1kg hardener catalyst works perfectly with Cromar Pro GRP Top Coat to ensure a durable, robust, and long-lasting finish. Its designed for professional use, offering a reliable solution for tasks requiring superior bonding and sealing capabilities. Whether its for roofing or other fibreglass applications, this product promises excellent results every time.