When the job calls for strong, reliable sealant, accept only J-B Weld Silicone All-Purpose RTV Sealant and Adhesive. This 100% silicone all-purpose RTV sealant and adhesive boasts a fast 1-hour cure time. It's waterproof, mold- and mildew-resistant. The J-B Weld white sealant is ideal for tubs, showers, sinks, bathroom work, interior trim, moldings, door frames, lens housing, and more. The clear sealant is great for windshields, windows, lens housing, door frames, tubs, and more. 100% silicone all-purpose RTV sealant and adhesive Fast 1-hour set time White or clear cure color Waterproof Mold- and mildew-resistant