A rubber construction material that vulcanizes to a flexible, concrete-like substance is made of silicone rubber and specially treated reinforcing materials. When applied in a one-eighth inch thick layer over highway surfaces, patios and other traffic bearing surfaces, including wood it provides a texture similar to concrete. However, its ability to bend, elongate and resist water penetration is said to provide greatly improved durability where exposure to water, freezing, acids, and many other extreme conditions are present. One of its primary developmental uses has been as a protective coating over conventional concrete in places where water penetration, acid attack, movement, or other conditions have caused damage. It has also been employed as a flexible grout for tile, patio stone, and as a waterproof protective layer for sundecks located over living areas and for parking garage floors as well as swimming pool decking. Another major developmental use has been to repair cracks in industrial concrete.