& nbsp; & nbsp; & nbsp; Polyurethane sealant is a sealant mainly composed of polyurethane rubber and polyurethane prepolymer. This type of sealant has high tensile strength, excellent elasticity, wear resistance, oil resistance, and cold resistance, but its water resistance, especially alkali water resistance, is poor. It can be divided into three types: heating vulcanization type, room temperature vulcanization type, and hot melt type, among which room temperature vulcanization type has single component and two-component types.
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Application and common knowledge of polyurethane sealant
Polyurethane sealant is a sealant mainly composed of polyurethane rubber and polyurethane prepolymer. This type of sealant has high tensile strength, excellent elasticity, wear resistance, oil resistance, and cold resistance, but its water resistance, especially alkali water resistance, is poor. It can be divided into three types: heating vulcanization type, room temperature vulcanization type, and hot melt type, among which room temperature vulcanization type has single component and two-component types.
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Polyurethane sealant is widely used as a joint sealing material in buildings, squares, highways, as well as in automobile manufacturing, glass installation, electronic filling, submarine and rocket sealing.
Polyurethane sealant has the following characteristics: excellent wear resistance, low tenderness and softness, wide adjustable performance range, high mechanical strength, good adhesion, good elasticity, and excellent recovery. It is suitable for dynamic joints, has good weather resistance, a service life of up to 15-20 years, excellent oil resistance, good biological aging resistance, and moderate price.
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