Brighttop Expansive Demolition Grout for Controlled Rock and Concrete Breaking Brighttop Expansive Demolition Grout is a non-explosive demolition material developed for controlled cracking and removal of rock, concrete and masonry. The dry powder is mixed with clean water and poured into a series of pre-drilled holes. During the reaction process, the grout generates expansive pressure inside the holes, gradually forming cracks in the surrounding material. This allows