100% waterproof all purpose sealant in a 2.8 ounce size is water ready in 12 hours - use for small projects and repairs including restoring small aquariums Silicone Sealant in a compact size is ideal for sealing, bonding, and repairing small projects, offering resistance to cracking and shrinking for long-lasting performance - additional uses include repairs to porcelain, china, ceramics, and even mending campers and tents Sealant is not paintable, paint surfaces prior to applying sealant Meets ASTM C920, Class 25 and the requirements of FDA Regulation No. 21 CFR 177.2600 Silicone rubber sealant can be used for interior and exterior applications - adheres to common building materials such as glass, ceramic, porcelain, most metals and most plastics