fire retardant vs fire resistant

ARMOR INSULATOR 300 is premium heavy duty, fire retardant, two component closed cell polyurethane Spray foam for building insulation system. The product is generated on site by combining an isocyanate and a polymeric resin through a dual-component proportioner. Fast, easy and adaptable, it can achieve an R-value of 20 at 3 inches. ARMOR INSULATOR 300 is a high density based polyurethane foam recommended for roofing and other exterior insulation because it is applied in a continuous manner.