Max-Tuff is an ultra-tough, synthetic lubricant designed for use in reassembling repaired equipment. Max-Tuff utilizes durable synthetic molecules that adhere to metal surfaces and create an extremely strong barrier between surfaces. This minimizes the possibility of metal-to-metal contact while providing excellent protection against rust and corrosion to both ferrous and nonferrous metals. Max-Tuff is formulated with Royal Purple's proprietary Synslide additive technology. Royal Purple: (888) 382-6300.

Joshua Elliott, Glendale, AZ:
“I’ve been building engines all my life and nothing compares to Max-Tuff synthetic assembly lube. I wouldn't trust my engine with anything else!”

Richard Davenport, Columbus, OH:
“I’ve used Royal Purple products for several years, and after inspecting my engine components, I was amazed that there was virtually no wear!”