Firemaster 504 is our lowest viscosity blend of PHT4-Diol and phosphate ester. The low viscosity blend offers improved process handling and storage characteristics versus Firemaster 508 while maintaining its effectiveness as a flame retardant for Class 1 and Class 2 rigid polyurethane foam; as well as, adhesives, coatings and one component foam.

Product Features

• Low viscosity (pours at room temperature)
• Fast bulk tank transfer versus Firemaster 508
• Higher solubility versus neat Firemaster 508
• Exhibits excellent compatibility with a broad range of commercial polyols and blowing agents.