SKU: KVKROIL8
UPC: 857236004087
MPN: KL081
Kroil Original Penetrant is the industrial-strength penetrating oil that shooters and gunsmiths reach for when a bolt, pin, or screw refuses to budge. This 8 fl oz metal drip can (MPN KL081) from Kano Laboratories Inc. delivers a low-viscosity formula that creeps into threads, crevices, and rust-frozen joints where heavier oils stall out. Kano has built this formula since 1939, and it has earned its reputation on seized fasteners that won't respond to anything else. If you work on older firearms, recoil rod assemblies, or any hardware that's sat through humidity and salt air, this is the can that frees it up without rounding heads.
The chemistry is what sets Kroil apart from general-purpose oils. With a viscosity of 3.18 cSt at 104°F and a specific gravity of 0.864, it wicks into openings too small for thicker products to enter, which is why it reduces the torque needed to break loose a corroded nut or stud. The formula is built on severely hydrotreated petroleum distillates with terpene alcohols and ketone solvents, giving it the ability to displace moisture, attack rust, and clean carbon deposits. It's safe on all metals, carries a 132°F flash point, and is 50-State VOC Compliant. It also holds an NSF H2 Nonfood registration (#165745), so it's cleared for use in environments where incidental contact with equipment matters. Made in the United States.
Use Kroil any time you're fighting rust, frozen fasteners, or stubborn carbon during a teardown. Let it soak into a seized takedown pin or a rusted action screw, give it a few minutes, and the part usually surrenders without damage. It's a smart companion to your regular bore work and lubrication routine, so keep it on the bench next to your powder solvents and a protective gun oil for finish work. Browse the rest of our cleaning and maintenance lineup to round out your kit.
Kroil Original Penetrant creeps into small openings, threads, and crevices to loosen seized or frozen fasteners like nuts, bolts, screws, studs, and pins. It also attacks rust and corrosion, displaces moisture and salt water, and cleans carbon deposits, all while remaining safe on every metal.
Yes. The formula is safe on all metals and works well for freeing seized takedown pins, rusted action screws, and corroded hardware. It also cleans carbon deposits. Many shooters keep it on the bench alongside their regular bore solvents and protective oils for finish work.
No. The 8 oz KL081 Original Penetrant carries an NSF H2 Nonfood Compounds registration (#165745), meaning it's cleared for use where incidental equipment contact may occur but not direct food contact. The food-grade variant is a separate product that meets NSF H1 standards.
Its low viscosity of 3.18 cSt at 104°F lets it wick into openings too small for heavier oils to reach. Once it penetrates the threads, it reduces the torque needed to break a corroded fastener loose, which helps prevent rounding heads or snapping studs.
This is an 8 fl oz metal drip can measuring 2.875 inches long, 1.5 inches wide, and 5.375 inches tall, with a net weight of about 0.45 lb. Kano Laboratories Inc. has manufactured Kroil in the United States since 1939.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
