Orange Guard Home Pest Control gallon size. Orange Guard is a broad range insecticide and residual repellent. Orange Guard dissolves the waxy coating on an insects exoskeleton resulting in suffocation. For using Orange Guard outside, a gallon size is recommended. May be used around food humans and pets. All ingredients are on the FDA GRAS list (generally regarded as safe). Orange Guard is OMRI listed (Organic Materials Review Institute) as allowed for use in organic production. It kills and repels hidden bugs including ants, roaches and fleas.