ONETIME LIFETIME treatment. Contains natural cedar wood oil & proprietary binders (to lock in the cedar wood oil) Dispersed in a mineral spirits carrier. The carrier is highly refined and is formulated to meet FDA’S 21, CFR 178.3620B (among others). In essence the carrier is a low viscosity analog to mineral oil. As such, it will burn and the OSHA Pel is 500PPM (TWA). Once dried, the protective, bound cedar wood oil is completely NON TOXIC.