E-Prep 221 prevents re-tarnishing of brass and copper after brightening. Does not contain nitric or chromic acids, chromates, chelators, or complexers. This product is environmentally safe. Parts should be thoroughly cleaned.
E-Prep 221 prevents re-tarnishing of brass and copper after brightening. Does not contain nitric or chromic acids, chromates, chelators, or complexers. This product is environmentally safe. Parts should be thoroughly cleaned.