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SPF (spray polyurethane foam), like most other organic materials, is combustible. Although SPFs are formulated with flame retardants to meet the requirements of various construction codes and minimum performance standards there is still a need to provide further protection from fire. All foams must undergo some common fire tests such as ASTM E84, UL 723 and others, to determine how fast and how far a flame will travel across the surface, along with how much smoke is produced when the foam is exp …