Below is a list of Castable Urethane manufacturers from San Luis Obispo, California. Castable urethanes are elastomers that contain urethane carbamate links, are processed in liquid form, and are extremely well-suited for casting. Although they vary widely in terms of hardness and chemical composition, castable urethanes as a whole offer exceptional physical characteristics including high abrasion, chemical resistance, tensile strength and load bearing capabilities.