... and high curing rate for construction and industrial applications.HX-3800 cures at room temperature under the action ... , APTK and neoprene.HX-3800 is not recommended for use on substrates, such as marble, concrete, fibrous ... as corrosion will result.HX-3800 is not recommended for use on natural stone, such as marble, granite ... in preparing specifications) Structural Silicone Sealant for Sun Room Sealing