ASMACO PUF 40 comprises a polyol component that includes a precise blend of base polyols, stabilizers, fire retardants, catalysts, and a blowing agent. When reacted with the isocyanate component—polymeric diphenylmethane diisocyanate (MDI)—it forms a rigid polyurethane foam offering outstanding thermal insulation and a smooth surface finish. This system delivers superior adhesion to various substrates, making it ideal for building insulation. The closed-cell foam structure enhances energy efficiency by minimizing heat transfer, while the integrated fire retardants increase safety in residential, commercial, and industrial insulation applications.