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AF444 is an epoxy filling and interior repair compound proven to be resistant to low smoke fire, vertical burn and OSU heat release. AF444 is made for aircraft and, according to available information on its adhesive type, retains strength at up to 350 degrees Fahrenheit. AF444 may be applied with a trowel or spatula and takes only 30 to 40 minutes to cure. The curability of AF44 allows for effective use during change around operations.