GE Tub & Tile Silicone 1 Sealant - Squeeze, Clear, 2.8oz. From the #1 Silicone Brand, Tub & Tile Silicone 1 sealant is a 100% silicone and 100% waterproof sealant ideal for areas susceptible to moisture such as sinks, tubs, showers, fixtures, countertops, backsplashes and plumbing projects. Tub & Tile Silicone 1 sealant is flexible with strong adhesion and resistant to stain-causing mold and mildew growth with 7-year mold-free product protection. Backed by a lifetime guarantee.