Method of waterproofing with a self-healing bentonite sheet material composite article

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a polymeric sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of polymeric sheet material and a second layer including water-swellable clay in an amount of 35 to 90% by weight of the second layer and an elastomer in an amount of 1% to 20% by weight of the second layer;

• and polypropene, polybutene or mixtures thereof in an amount of 10% to 65% by weight of the second layer, said second layer having essentially no silicic filler.

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a polymeric sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of a water-impermeable, flexible sheet of polymeric material adhered to a second layer, the second layer comprising a water-swellable clay in an amount of 35% to 90% by weight of the second layer, an elastomer in an amount of 1% to 20% by weight of the second layer, and a plasticizer capable of extending said elastomer in an amount of 2% to 50% by weight of the second layer.

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a flexible sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of flexible sheet or web material and a second layer having essentially no silicic filler material, adhered to said first layer, consisting essentially of a water-swellable clay in an mount of 35% to 90% by weight, an elastomer in an amount of 1% to 20% by weight, and a plasticizer capable of extending said elastomer in an amount of 2% to 50% by weight of the composition.

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a polymeric sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of flexible sheet or web material and a second layer, adhered to said first layer, consisting essentially of a water-swellable clay in an amount of 35% to 90% by weight, an elastomer in an amount of 1% to 20% by weight, and polypropene, polybutene or mixtures thereof in an amount of 2% to 50% by weight of the second layer.

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a polymeric sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of flexible sheet material;

• and a second layer, adhered to said first layer, comprising a water-swellable clay in an amount of 35% to 90% by weight;
• polypropene, polybutene or mixtures thereof in an amount of 10% to 65% by weight;
• and having 0 to 1% by weight of a silicic filler material.

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a polymeric sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of flexible sheet or web material;

• and a second layer, adhered to said first layer, comprising water-swellable clay in an amount of 35 to 90% by weight of the second layer, and polypropene, polybutene or mixtures thereof in an amount of 10% to 65% by weight of the second layer.

A method of waterproofing an area of potential water leakage comprising disposing a multi-layer article of manufacture in contact with said area of potential water leakage to provide a polymeric sheet primary seal and a bentonite composition secondary seal, said multi-layer article of manufacture comprising a first layer of a water-impermeable sheet of polymeric material adhered to a water-swellable clay composition second layer, wherein the second layer has essentially no silicic filler and comprises a water-swellable clay in an amount of 35% to 90% by weight of the second layer, an elastomer in an amount of 1% to 20% by weight of the second layer, and a plasticizer capable of extending said elastomer in an amount of 2% to 50% by weight of the second layer.