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Abstract

A multiple layered waterproofing coating comprising a first, flexible layer having relatively high flexibility, adhesiveness and elongation properties, which is adapted to bridge cracks even in low temperatures, and a second, protective hard layer having high tensile strength and low adhesiveness properties. The layers are prepared from liquid formulations which are spray applied to the surface to be coated, primarily in below-grade foundations. The first, flexible layer is formed by spraying onto a surface a liquid formulation which provides a dried coating layer having high flexibility, adhesiveness and elongation properties. A second, protective layer is formed over the first, flexible layer by spraying over the first layer a liquid formulation which provides, when dried, a hard coating layer having high tensile strength and modulus, and low adhesiveness properties.

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First Claim