21 4 月 Polyurethane sealant – the most widely used sealing material
Polyurethane is a new type of synthetic polymer material, it is widely used in the construction industry, the common polyurethane materials are polyurethane plate, polyurethane plastic, polyurethane glue and so on. Among them, polyurethane sealant used as bonding or sealing is one of the commonly used...