Bostik BLOCK C902

Bostik BLOCK C902 is a rapid-setting waterproof plugging compound designed to stop active water leaks through concrete and masonry before tanking. Formerly known as Sovereign Hey’di Powder X, it sets within seconds when in contact with water, creating a strong waterproof plug ready for use with the Sovereign Hey’di K11 Tanking System.

Ideal for basements, cellars, retaining walls and other below-ground waterproofing applications, BLOCK C902 can be applied directly as a dry powder or mixed into a thick paste for wall/floor joints and overhead areas.