Other applications Covestro Bayhydur XP 2655 Hydrophilic HDI polyisocyanate Low viscosity and easy to disperse Type Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI), used as curing ... 11/1597Covestro Bayhydur XP 2655 Hydrophilic HDI polyisocyanate Low viscosity and easy to disperse