C.L. Industries AquaBond® AQUABNDGRY 65 lb Gray Bonding Agent and Scratch Coating Cement Mix . AquaBond® is a scientifically modified cement-based coating formulated for increased performance and time-saving application. Its advanced technology increases overall reliability, so warranty callbacks are virtually eliminated. Acting as a bonding agent and a scratch coat, AquaBond delivers a superb link between properly prepared substrates and new plaster coats. The AquaBond system saves labor and equipment costs while virtually eliminating de-lamination problems. It makes excessive pool substrate preparation such as sand blasting or stripping a thing of the past, reducing the material needed for new plaster coat by up to 30%. More importantly, AquaBond helps promote the even hydration (curing) of plaster applications, which is especially beneficial when using an exposed aggregate surface