DAP All Purpose Adhesive Silicone Sealant is a durable, 100% silicone rubber sealant designed for a wide range of quick household repairs and projects. Safe for fish (once fully cured) and a great choice to restore or build small aquariums. This sealant creates a flexible, 100% waterproof seal that resists cracking and shrinking, ensuring long-lasting performance. Meets the requirements of FDA Regulation No. 21 CFR 177.2600, making it safe for incidental contact with food. Sealant works on interior and exterior applications and is dishwasher and microwave safe.