Liquid Wrench

Liquid Wrench has been an American garage staple since 1941. Originally developed to free rusted bolts and seized hardware, the brand built its reputation on a simple promise: a mechanic with a stuck fastener should not have to fight it. The penetrating oil line remains the core product, and it is sold at virtually every auto parts store and home center in the United States. Owned today by Blumenthal Brands Integrated (operating as RSC Chemical Solutions), Liquid Wrench products carry the "Cerflon" branding — a PTFE-reinforced formula that adds lubrication residue to the traditional penetrating function. The brand positions itself as a value-tier alternative to premium penetrants, with wide retail distribution and consistent packaging that most DIY mechanics recognize immediately.