What are the waterproof materials?

There are many kinds of waterproof materials, which can be divided into four categories according to their main raw materials: ① asphalt waterproof materials. Asphalt linoleum, paper tire asphalt linoleum, solvent-based and water-emulsion asphalt or asphalt rubber coatings and ointments with natural asphalt, petroleum asphalt and coal asphalt as main raw materials have good cohesiveness, plasticity, water resistance, corrosion resistance and durability. ② Rubber and plastic waterproof materials. Using chloroprene rubber, butyl rubber, ethylene propylene diene monomer, polyvinyl chloride, polyisobutylene and polyurethane as raw materials, elastic tire-free waterproof coiled material, waterproof film, waterproof coating, ointment, putty, water stop and other coatings and sealing materials can be made. It has the characteristics of high tensile strength, high elasticity and elongation, good adhesion, good water resistance and weather resistance, can be used cold and has a long service life. ③ Cement waterproof material. Admixtures, such as waterproofing agent, air entraining agent and expansion agent, can accelerate the setting and compaction of cement and enhance the hydrophobicity and impermeability of cement mortar and concrete; Accelerated setting mortar based on cement and sodium silicate can be used for plugging and waterproofing in underground engineering. ④ Metal waterproof material. Thin steel sheet, galvanized steel sheet, profiled steel sheet and coated steel sheet can be directly used as roofing waterproof sheets. Steel plate is used as metal waterproof layer of basement or underground structure. Thin copper plate, thin aluminum plate and stainless steel plate can be made into water stop for deformation joints of buildings. Joints of metal waterproof layer shall be welded and painted with antirust protective paint.