application Covestro 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... 11/20169Covestro Desmodur BL 3175 SN Heat-activated HDI-based curing agent for one-component polyurethane coatings