application. Thermal Resistance:The long-term design thermal resistance of Celfort and Foamular insulation is 5.0 ft2 hrºF/BTU for 1-inch thickness or RSI 0.87 (m2 ºC/W) for 25 mm thickness according to CAN/ULC-S770-00.1 Engineering applications requiring: • High mpressive strength • Long-term thermal performance • phobic