Kroil

Kroil is a product line of Kano Laboratories LLC, a Nashville, Tennessee manufacturer founded in 1939. The brand built its reputation on a single premise: making penetrating oil that actually works on heavily rusted and seized fasteners where competitors fall short. Kroil's thin, fast-wicking solvent carrier — originally sold as AeroKroil in aerosol and Kroil in drip/pour liquid — became a staple in aerospace, military, industrial maintenance, and professional automotive shops before gaining mainstream availability through Amazon and home improvement retailers. The core product (now branded "Kroil Penetrant Original") uses severely hydrotreated petroleum distillates and an aliphatic hydrocarbon carrier engineered for low viscosity and deep capillary penetration into corroded threads and seized joints. The formula carries NSF H2 certification, making it approved for incidental food-contact applications and industrial kitchens — a certification that reflects formulation discipline beyond what typical hardware-store penetrating oils achieve. Kroil also offers Sili-Kroil (silicone-enhanced), Pene-Plate (with graphite), and Kroil Clear (colorless formula) for specialized applications. The brand's SDS documentation is maintained at kanolaboratories.com and is current with HazCom 2024 / WHMIS 2022.