Permatex Optimum Easy-Disassembly Grey reduces the time it takes to disassemble the engine or parts. Permatex Optimum Easy Disassembly Seals Strong and Removes Fast. Designed for maximum torque load and vibration resistance; typically used in import vehicles with closer bolt hold spacing. Applications include high vibration and high toque applications such as valve covers, water pump, intake manifold end seals, thermostat housings.