joint sealing tape (12cm x 10m)

Swelling tape which consists of sodium bentonite, embedded in a matrix of nonvulcanized rubber as binding agent. In contact with water develops volume by swelling up to 270%. As a result it seals and waterproofs the joint gaps permanently.WATERSTOP 1520 is used to underground constructions for sealing horizontal or vertical connection joints to concrete elements. Also it can be used for sealing conjunction joints (e.g pipes through concrete walls etc.).