Excellent wear resistance, low-temperature softness, wide adjustable range of performance, high mechanical strength, good adhesion, good elasticity, excellent recovery properties, suitable for dynamic seams and deformation seams , expansion joints. It has good weather resistance, excellent oil resistance, biological aging resistance and low price.
Polyurethane sealants also have some disadvantages. For example: it is not heat-resistant for a long time; light-colored formulas are susceptible to UV aging; the storage stability of single-component glue is greatly affected by packaging and the outside world, and usually cures slowly; bubbles and cracks may occur in high-temperature and hot environments; many occasions require a primer Paint. At the same time, polyurethane sealant also has poor water resistance, especially alkali water resistance.