KROIL ORIGINAL PENETRANT. BEST PENETRATING OIL. Kroil's unique, proprietary molecular architecture creates an affinity to metal that guarantees swift penetration, while maintaining a molecular structure capable of breaking bonds at the first molecular level. This unique molecular architecture was chemically engineered in the laboratory based on research which defined the interdisciplinary physical, electrical, mechanical and chemical properties which cause frozen metal parts. This research enabled Kroil to be chemically engineered to loosen frozen metal parts in every instance regardless of the cause. KROIL ORIGINAL PENETRANT. BEST PENETRATING OIL. Kroil's unique, proprietary molecular architecture creates an affinity to metal that guarantees swift penetration, while maintaining a molecular structure capable of breaking bonds at the first molecular level. This unique molecular architecture was chemically engineered in the laboratory based on research which defined the interdisciplinary physical, electrical, mechanical and chemical properties which cause frozen metal parts. This research enabled Kroil to be chemically engineered to loosen frozen metal parts in every instance regardless of the cause. NOTHING WORKS LIKE KROIL Kroil penetrates into ultra-tight spaces, breaking down rust and corrosion to loosen seized metal parts and linkages. REAL SCIENCE Kroil’s proprietary formulation ensures swift penetration of metal connections, and is capable of breaking corrosive bonds at the first molecular level. FAST. DEPENDABLE. DONE. Use Kroil on nuts, bolts, screws, pulleys, shafts, bearings, bushings, guns, pipe threads, spindles, valve guides, or on any corroded threads or tight parts. SILICONE LUBRICATION Sili Kroil works quickly to loosen and lubricate rusted or corroded metal parts and joints. (Found exclusively in Silikroil products) KEEP TOOLS RUST-FREE Kroil works to keep tools in great condition by fighting corrosion due to heat, salt water, chemical action, or weathering. THE GO-TO PENETRANT Kroil dissolves and removes rust, carbon deposits, gum, dried grease and oil, without attacking metal. Kroil Original Penetrating Oil, 8 oz. Liquid (KanoLabs Kroil) Kroil Original Penetrating Oil, 1 Gallon Liquid (KanoLabs Kroil) Kroil Aerokroil Penetrating Oil, 10 oz. aerosol (AEROKROIL) Kroil Aerokroil Penetrating Oil, 13 oz. aerosol (AEROKROIL) Kroil Aerokroil Penetrating Oil, 16.5 oz. aerosol (AEROKROIL) Kroil Silikroil Penetrating Oil King Size, 16.5 oz aerosol (SILIKROIL) Buying Options Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.8 out of 5 stars 6,433 4.7 out of 5 stars 271 4.8 out of 5 stars 3,249 4.8 out of 5 stars 1,275 4.8 out of 5 stars 3,474 4.7 out of 5 stars 1,144 Price — no data $120.25$120.25 $20.58$20.58 $34.60$34.60 $32.49$32.49 $34.18$34.18 Size 8 oz. 1 gal. 10 oz. 13 oz. 16.5 oz 16.5 oz. Aerosol no data no data ✓ ✓ ✓ ✓ Brand Kroil Kroil Aerokroil Aerokroil Aerokroil Silikroil Silicone Lubrication no data no data no data no data no data ✓