Swelling tape which consists of sodium bentonite, embedded in a matrix of non-vulcanized 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.

Polystop waterstops are high Grade PVC resin extrusions that are plasticised and stabilized to offer long life performance, resistance to abrasion and attack by oxygen, alkalis and waterborne chemicals.