Excellent for lead, powder, plastic & copper fouling. Repeated use protects the bore and lessens fouling/ residue buildup. Makes gun bores & actions easier to clean. Cleans and eliminates stiff actions, jamming, and loosens rusted parts. Lubricates and protects: rust inhibitors and special additives penetrate the metal and provide a corrosion barrier for superior rust protection. Synthetic: super proprietary formula is based on a unique blend of non-hazardous & environmentally friendly ingredients.