Recently the petrochemical industry has moved to molybdenum disulfide, which is also called “moly” lube. Currently this is the best type of lube for assembling bolted joints, because it does not cause hydrogen embrittlement if mixed with the correct chemicals.

What lubricant should you use? In the past nickel-based lubricants were often used due to their high heat resistance. Industries have recently moved to molybdenum disulfide or “moly” lubrication. Moly lubricants are known for being the best type of lube for assembly as it does not cause hydrogen-induced cracking.

lithium grease A white lubricant, lithium grease is considered an all-purpose lubrication solution. It can be used to lubricate in applications involving metal-on-metal, or even metal-on-plastic. It effectively helps reduce unwanted friction and encourages components to move far more smoothly.

“The best penetrating oils quickly loosen rusted nuts and bolts, free frozen shafts, pulleys and more. With Kroil, no space is too tight to penetrate, thanks to its ability to seep into the smallest opening or crevice.”

Liquid Wrench penetrating oil should do most of what the other products on this list can to combat a rusty bolt, but for a lot less money. Not that any of these oils are that costly, but this product is less than four bucks for an 11-ounce spray can, making it about one-third as expensive as PB B'laster.

White lithium grease White lithium grease demonstrates excellent adhesion to metal and is perfect for lubricating metal on metal surfaces.

Lithium grease is renowned for being an all-purpose lubricant. It is specifically effective for lubrication where metal-on-metal contact will occur but is equally effective in operating environments where metal-on-plastic friction may occur.

You'll need some rust remove spray (available from your local hardware store) if you don't have one available, use a lubricant spray like WD40 instead. Attack the bolt head / thread again with the wire brush. Spray your rust remover / lubricant one more time, then wipe off with a dry cloth.

• WD-40. BUY NOW. WD-40 has become a trusted name when it comes to removing rust from automotive parts.
• Evapo-Rust. BUY NOW. Another Evapo-Rust product that we like is the Gel Rust Remover.
• FDC Rust. BUY NOW.
• Thermocure Coolant. BUY NOW.
• POR Stop Rust Kit. BUY NOW.
• Rust Kutter. BUY NOW.
• Sta-Bil Rust. BUY NOW.
• Jenolite Rust. BUY NOW.

molybdenum disulfide What lubricant should you use? In the past nickel-based lubricants were often used due to their high heat resistance. Industries have recently moved to molybdenum disulfide or “moly” lubrication. Moly lubricants are known for being the best type of lube for assembly as it does not cause hydrogen-induced cracking.

Kroil Original Penetrating Oil (Aerosol Spray-16.5oz Can-Single) | Penetrant for Rusted Bolts, Metal, Hinges, Chains, Moving Parts | Rust, Corrosion Inhibitor (KS162)

Look for an original version from a brand you trust, like Kroil. This kind of penetrating oil is made to loosen up nuts and bolts that have seized up or experienced rust. The formula will penetrate seized fasteners or break down rust to make it easier to turn and remove these kinds of fasteners.

White lithium grease demonstrates excellent adhesion to metal and is perfect for lubricating metal on metal surfaces.