Dual Seal Waterstop is a bentonite / HDPE based waterstop which reacts in contact with water by swelling to form a watertight seal in concrete structures. It can be installed directly onto scabbled surfaces and will swell into honeycombing of concrete or voids up to 12mm deep.

Dual Seal Waterstop has been independently tested up to 30 metre head of water, and has full WRC approval for use with potable water. Dual Seal Waterstop can be applied to green concrete and in damp conditions.

Profile size 25mm x 7mm. Roll size 8m.