Question 1: one-component polyurethane coating has no strength?

Coating there would be no strength, not completely dry curing polyurethane table do not representative coating curing, after being cured coating is strength, or coating added inappropriate additives, lead to lost the coating after curing the original material performance.

Question 2: one-component polyurethane drum or at the grass-roots level off problem?

Reason: water wet or volatile solvent at the grassroots level will lead to dissipate the drum, grassroots have float ash, sand on the surface will cause the coating fall off.

Solution: polyurethane coating before coating to ensure basic dry, no oil, such as basic surface laitance or float ash, USES steel wire brush grinding laitance, net float ash blower.

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Q.4 polyurethane coating surface hair craze?

Reason: polyurethane coating after coating, after the coating has not been cured with interface agent, hair, polyurethane coating has not been fully reflect, there are still solvent oil attached to the surface, the hair will cause cracking, empty drum.

Solution: after coating completely dry, such as the coating surface cracking hair completely polished away empty drum interface agent, hair again.

Giving: how to solve the problem of large viscosity of polyurethane?

For one-component polyurethane solvent paint, viscosity is larger, the construction is difficult, suggest a scraper blade coating, roller coating or brush is not recommended. In addition, you can add within the coatings diluent, before use must first do test, use a small amount of sample ?