Silicone I tub and tile sealant is 100% silicone and 100% waterproof sealant and is resistant to unsightly stain causing mold and mildew growth. Formulated for sealing around sinks, tubs, showers, fixtures, countertops, backsplashes and plumbing projects. Easy to apply with excellent adhesion, it remains permanently flexible and will never crack, shrink, break down or wash away. Guaranteed for as long as you own your home.