Features Sikaflex 221 Multi-Purpose Polyurethane Sealant/Adhesive - 10.3oz(300ml) Cartridge Sikaflex -221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive that cures on exposure to atmospheric humidity to form a durable elastomer Meets approvals ASTM C920 types Sikaflex -221 is tested and classified in accordance with ANSI/UL 723 "Test for Surface Burning Characteristics of Building Materials" Uses:Sikaflex -221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics.Characteristics & Advantages: Highly elastic and durable Resistant to aging and weathering exposure Non-corrosive Can be sanded and overpainted NSF registered, Proprietary Substances and Nonfood Compounds (black, gray, and white) UL listed for potable water (black, gray, and white) Specifications Size: 10.3 oz