This standard mainly covers the classification, raw materials, technical requirements, test methods, inspection rules and labels, Encasement, transportation and storage of single component polyurethane foam caulking agent. It is suitable for aerosol canned single component polyurethane foam caulking agent (referred to as PU caulking agent for short) with polyol and polyisocyanate as the main raw materials. According to the combustion performance grade and Encasement structure, PU caulking agent is divided into different grades and types, and marked with corresponding information. Raw materials should comply with environmental protection regulations, and the use of CFCs is prohibited. Appearance and physical performance, PU caulking agent should have certain requirements, including uniform Color in liquid state, uniform foam pores after curing, etc.