Permatex The Right Stuff Grey Gasket Maker 10.1 oz — Fast-Curing, High-Temp Oil & Coolant Resistant

Permatex The Right Stuff Grey Gasket Maker is a fast-curing, blowout-resistant silicone that forms a durable elastomeric gasket for engine and powertrain components.

Engineered for tight bolt patterns and high-torque applications often found on import and modern engines, this grey gasket maker creates a leakproof seal in about one minute. It cures into a flexible rubber that resists oil, coolant and automatic transmission fluid, and handles continuous temperatures up to 450°F (232°C) with intermittent peaks to 500°F (260°C). Sensor-safe and formulated to replace many precut gaskets, it’s an option for mechanics and DIYers who need a dependable, heat-tolerant seal.

How quickly does it seal, and when can I put the part back into service?

Permatex The Right Stuff Grey sets rapidly to resist blowouts, allowing most assemblies to be serviced and reinstalled quickly. Initial sealing occurs in about one minute, though full cure depends on bead size and operating conditions. The fast tack helps prevent fluid loss during reassembly, streamlining repair times.

• Initial tack and blowout resistance in ~1 minute
• Full cure time varies with bead thickness and temperature
• Recommended for fast reassembly of valve covers, oil pans and housings

Will it stand up to oil, coolant and transmission fluid?

Yes — this gasket maker is formulated to resist common powertrain fluids including engine oil, coolant and ATF. The cured elastomer maintains a reliable seal when exposed to these chemicals, reducing the risk of leaks in service. That chemical resistance makes it suitable for gaskets that contact lubricants and coolant passages.

• Chemical resistance to oil, antifreeze/coolant and automatic transmission fluid
• Maintains flexibility after exposure to fluids
• Suitable for oil pans, thermostat housings and transmission pans

What temperature range can the seal handle?

The Right Stuff Grey tolerates continuous operating temperatures up to 450°F (232°C) and intermittent spikes to 500°F (260°C). This high-temperature capability makes it appropriate for many engine bay locations that see sustained heat. Use in applications that remain within these thermal limits for best long-term performance.

• Continuous service to 450°F (232°C)
• Intermittent resistance to 500°F (260°C)
• Suitable for hot surfaces like valve covers and nearby engine components

Which parts and repairs is this gasket maker best for?

Permatex designed this grey formula for areas with closely spaced bolts and heavy torque where precut gaskets may fail. It’s commonly used on valve covers, oil pans, transmission pans, thermostat housings and water pumps. Because it cures into a tough, elastomeric gasket and is sensor-safe, it’s a practical choice for many routine engine and powertrain repairs.

• Ideal for valve covers and oil pan gaskets on import and modern engines
• Works for transmission pans and thermostat housings
• Recommended where bolt patterns are tight or precut gaskets are unreliable

Who is this for? Technicians and home mechanics who need a fast-curing, high-temperature gasket solution will appreciate The Right Stuff Grey. It’s geared toward repairs that demand blowout resistance in tight bolt patterns, compatibility with powertrain fluids, and heat tolerance. If you replace gaskets frequently, work on import or high-torque engines, or want a sensor-safe sealant that outperforms many precut gaskets, this product is a suitable addition to your toolbox.