What Is The Water Swelling Polyurethane Sealant?

Polyurethane sealant is now a very large amount of a kind of glue, it can be well bonded with metal, concrete, glass, etc., and the service life is very long, if it is not exposed to the sun for a long time, the life is as long as 20 years. And polyurethane sealant has good weather resistance, environmental protection and non-toxic, indoor and outdoor can be used with confidence. Today, we will introduce an upgraded version of polyurethane sealant - polyurethane water expansion sealing glue.

What is the Water Swelling Polyurethane Sealant?

Polyurethane water expansion sealing adhesive, also called water swelling polyurethane sealant, not only has the advantages of traditional polyurethane sealant, but also has the performance of water expansion. Water expansion sealing glue can generally be divided into two kinds of 220% expansion and 400% expansion.

The synthesis of water swelling sealing adhesive is based on polyurethane prepolymer, which is combined with urethane paste containing special grafting technology, and has double water sealing properties of elastic sealing and water swelling sealing. Because it contains a special grafting technology of ureane link chain, it will not cause the loss of water expansion element in long-term use, so the service life is greatly increased. Water expansion sealing glue can be constructed in a humid environment (there is no clear water), and has good acid and alkali corrosion resistance, hydrochloric acid, seawater, sodium hydroxide and other media will not cause water expansion sealing glue to lose its effect.

What is the Application of Water Swelling Polyurethane Sealant?

Water swelling polyurethane sealant can be widely used in subway tunnels, road and railway tunnels, sewage ponds and other fields, in view of its good environmental performance, can be directly used in water plants, reservoirs and other direct drinking water projects. The construction of water expansion sealing glue is relatively simple, the first is the cleaning of the construction joint, the more obvious dust and concrete particles can be cleaned up, the dry and wet conditions are not too strict requirements, no water can be. Then is the glue gun glue, it should be noted that the size of the glue mouth opening, according to the size of the gap to cut, too large will cause waste, too small can not be good to plug the gap. Finally, glue, glue into the construction joint, if it is for family use, need to stick seam paper on both sides of the gap, glue off can be. After the glue is driven into the construction joint, it is necessary to avoid contact with water before it cures.