Other applications desmodur bl 3175 sn heat-activated hdi-based curing agent for one-component polyurethane coatings type based on blocked polyisocyanate of hexamethylene diisocyanate form of supply 75%of1... 11/15231Covestro Desmodur BL 3175 SN Heat-activated HDI-based curing agent for one-component polyurethane coatings