Fast-Acting Rust Penetrant for Nuts, Bolts, Locks & Stuck Parts

Free rusted, frozen, or seized components fast with WD-40 Specialist® Penetrant—a powerful, fast-acting formula engineered with capillary action to penetrate deep into threads, crevices, seams, and tight spots. This low-odor penetrant breaks rust bonds on contact and helps get equipment back in working order without damage.

Tested to penetrate up to 2x faster and prevent rust 10x longer than the leading competitor*, it’s ideal for nuts, bolts, pipe threads, locks, chains, and any rusted or stuck parts. The Sprays 2 Ways® Smart Straw lets you choose between a precision stream or a wide spray pattern for total control.

Once applied, it leaves behind a light protective layer that resists rust and corrosion from reforming, making it a go-to solution for automotive, industrial, mechanical, and home repair applications. Safe for use on metal, rubber, and most plastic parts and 50-state VOC compliant.

Key Features:

• Penetrates rust 2x faster to loosen frozen, rusted, or corroded parts*

• Prevents rust 10x longer than the competition**

• Breaks rust bonds with capillary action

• Leaves behind a rust-inhibiting protective layer

• Spray 2 Ways®: precision stream or wide-area spray

• Low-odor formula

• Safe for use on metal, rubber, and plastic parts

• 50-state VOC compliant

*Test Lab: Fred Cuneo (3rd Party); Nail Climb Test; Test Date: 03/2021
**Test Lab: WD-40 Co. Technical Center; ASTM B117; Test Date: 02/2021

Applications:

• Rusted nuts and bolts

• Pipe threads

• Chains and locks

• Stuck mechanical parts

• Frozen fasteners and components