BLOK is a moisture vapor barrier and anti-crack membrane like no other vapor barrier in the market.
BLOK in addition to helping against humidity, its flexibility prevents hair line cracks from reflecting on the finish. It is a two parts epoxy product ratio 2: 1. BLOK is a no VOC and has amber or black color. BLOK is used as a silica bed to receive self-leveling cement or as a black primer base for BOLTEX METALLIC colors.