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    SPETEC® BST300

    Hydrophilic bentonite strip for waterproofingof construction joints in concrete

    SPETEC® BST300 is a black hydrophilic strip 25 x 20 mm made of sodium bentonite and rubber with special fillers and crystalline admixture. SPETEC® BST300 is placed where the joint will arise. The sealing of the joint is realized by crystallization of additives in, and the swelling of the strip. In contact with water and in confined conditions, SPETEC® BST300 will swell and stop the water infiltration.