Trusted by Professionals: Kroil Original Penetrant with Silicone is a rust penetrating aerosol spray that tackles seized bolts and frozen metal parts with ease Unmatched Penetrating Power: This oil easily penetrates small openings and tight threads, and crevices, making it the ideal rust remover for tough repair jobs and stuck parts Multi-Use Versatility: Kroil Original Penetrant is trusted for any job with moving parts; use for boat maintenance, fishing and marine applications, hinges, or garage door rollers Industrial-Strength Lubricant: Kroil penetrates and removes rust, inhibits corrosion, cleans carbon deposits, and displaces moisture; withstands any condition, including high humidity and salt water About Kroil: Kroil solves universal challenges by producing the very best penetrants on the market to help hard-working folks Kroil Original Penetrant has been the trusted name in rust penetrating lubricants since 1939, relied upon by professionals and DIYers alike to get the job done right the first time. This industrial-strength penetrating oil is expertly engineered to loosen rusted metal components, seized stuck bolts, and free frozen fasteners, making it a must-have for any toolbox. Thanks to its unique formula, it penetrates quickly and deeply into the smallest crevices, threads, and tight spaces, ensuring you can tackle even the toughest repairs without hassle. Whether you're working on rusted hinges, corroded garage door rollers, or stubborn exhaust nuts, this versatile rust remover spray helps you conquer any challenge with confidence.

Kroil Original Penetrant is more than just a frozen parts lubricant—it’s a high-performance solution designed for the harshest environments. Its powerful corrosion inhibitor oil not only attacks and removes existing rust, but also helps prevent future corrosion, making it ideal for use in areas exposed to humidity, salt water, and changing temperatures. This penetrating oil is perfect for a wide range of moving parts, including chains, bike gears, motorcycle linkages, and door mechanisms.

We’ve been around long enough to see a few things, and the world has certainly changed over the years. But regardless of how things have evolved, three constants remain: metal rusts, parts lock up, knuckles get scraped. To solve these universal challenges, we established the Kroil brand in 1939 with the goal of producing the very best penetrants on the market. Since then, our Original and Silicone formulas have been getting hard-working folks out of tightly locked situations in just about every industry…and quite a few home scenarios as well.