Bentonite paste made from natural sodium bentonite and plasticising additives for sealing elements which pass through surfaces. TECHNICAL DATA: Density: 1.50 kg/dm³. Composition: – 50% natural sodium bentonite; – 50% non-toxic plasticising agents. Behaviour in water: the bentonite hydrates freely and swells. Behaviour in air: does not dry. Packaging: 15 kg drums.