Product Details: The Permatex Surface Insensitive Threadlock is the perfect choice for fasteners with a little oil film. This general purpose medium to high strength threadlocker is designed to stop vibration from loosening and is oil resistant. It is easy to apply and simple to disassemble with hand tools. This bottle is suitable for fasteners from 1/4" to 3/4" size. FleetPride is your First Click in Heavy Duty®.