565 Thread Sealant

The 565 Thread Sealant from PERMATEX is a vital solution for mechanics, technicians, and automotive enthusiasts who require dependable performance in critical fastener applications. This thread sealant effectively prevents leaks and corrosion on hydraulic fittings, fuel system connections, coolant ports, and transmission lines—areas where even minor seepage can jeopardize vehicle performance or safety.

This anaerobic formula is designed for high-vibration environments and extreme temperature variations, making it suitable for both street and performance applications where traditional tape or dry threads may fail. The PERMATEX 565 formulation cures anaerobically, meaning it hardens only in the absence of air and in the presence of metal, creating a flexible, resilient seal that locks threads while allowing for future disassembly without seizing.

Mechanics working on both import and domestic vehicles will find this sealant particularly beneficial due to its compatibility with aluminum, cast iron, and stainless steel threads. It is especially valuable during transmission rebuilds, engine overhauls, and custom plumbing modifications, providing a reliable solution for preventing leaks in critical automotive systems.