Uncured foam is sticky to skin and clothing. Do not touch skin and clothing when using. There is a pressure of 5-6kg/cm2 (25℃) in the polyurethane foam caulk tank, and the temperature should not exceed 50℃ during storage and transportation to prevent tank blasting. Polyurethane foam caulk cans should be kept away from direct sunlight, and children are not allowed to touch them. Empty cans after use, especially those that have not been used up, should not be thrown around, and empty cans should not be burned or pierced. Keep away from open flames and do not contact with inflammable and explosive objects. The construction site should be ventilated. Construction personnel should wear work gloves, work clothes and goggles and do not smoke during construction. In case the foam touches eyes, rinse with water before going to hospital. If skin is touched, rinse with water and soap.