A New Standard for Fire Safety - Meet the next generation of open-cell spray foam. Demilec APX 1.2 exceeds the stringent fire-test requirements from the International Building Code. No ignition barrier needed in attics and crawl spaces. Demilec APX has an R-value of 3.7 at 1 inch. In case of a fire, once the flame is removed, the insulation will not propagate a flame. This superior fire performance eliminates the need for additional protective materials and provides a new standard for fire safety.