Insul-Cure® IG Sealant HL5153B is a reactive hot melt adhesive that falls under the category of reactive chemistry. It is a single component adhesive used as a hybrid IG sealant. This adhesive offers good moisture vapor resistance and gas retention. It combines the strength of thermosets with the handling properties of hot melts. It is specifically designed for windows applications and provides a hybrid PUR with superior physical properties.