Polyurethane sealant is a kind of sealant that is one-component and cures at room temperature. The paste state makes it be squeezed out to operation. One-component polyurethane sealant cures by absorbing the moisture in the air. And it reacts with active group in the surface to play the adhesion role. It is not saggy, so it will not flow when used in vertical joints. It can adhere on metal, rubber, wood, cement, ceramic and glass. It has two functions: sealing and waterproofing. And one-component polyurethane sealant can be divided into two kinds according to the reaction encountering water: water-swelling sealant and no swelling sealant.
Cleaning is necessary before using the sealant, and it makes the adhesion effect better.
Polyurethane sealant can seal the joint and makes it waterproof.
Polyurethane sealant can be used in the window joint sealing, making the window sealed.
Polyurethane sealant makes the rebars fixed on the concrete ground firmly.
Polyurethane sealant can be used in bridge, making the bridge secure and solid.