Permatex Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, 9.5 oz PowerBead — Oil & High-Temp Resistant

Permatex Ultra Grey 85084 is a rigid, high-torque RTV silicone gasket maker formulated to resist heavy vibration and oils for leak-free seals in demanding engine applications.

Built for applications where engines experience strong torque and constant vibration, this 9.5 oz PowerBead can of Permatex Ultra Grey delivers an OEM-grade silicone sealant that stands up to automotive fluids and extreme temperatures. It cures to a firm, silicone gasket that helps maintain sealing surfaces on import and domestic engines while remaining low-odor and noncorrosive. Use it for joints where a durable, permanent gasket is required and where conventional cut gaskets may fail under stress.

How does this gasket maker perform under high torque and vibration?

Permatex Ultra Grey is engineered to cure to a rigid, high-torque gasket that resists deformation and blowout in high-stress environments. The formulation limits movement at the seal line, preserving clamping force and preventing leaks caused by vibration or repeated thermal cycling.

• Rigid cured silicone for stable sealing under load
• Maximum vibration resistance to prevent seal failure
• Maintains clamp load and gasket integrity during engine stresses

Which automotive areas is it best suited for?

This product is recommended where strong, durable seals are required—especially on applications prone to vibration or where a formed gasket would struggle. It’s suitable for both oil- and coolant-exposed joints when an OEM-quality silicone gasket is needed.

• Valve covers and oil pans where high torque fasteners are used
• Timing covers and intake manifold end seals on import engines
• Water pumps and thermostat housings exposed to shop fluids

What chemical and temperature resistance can I expect?

Ultra Grey offers outstanding resistance to oils, coolants and common shop fluids, helping seals remain intact when exposed to automotive chemicals. It also tolerates a wide service temperature range, supporting both cold starts and high-heat operating conditions.

• Excellent resistance to oil and coolant contamination
• Non-corrosive formula that won’t damage metallic surfaces
• Service temperature range from -65°F up to 500°F (intermittent)

How do I use the 9.5 oz PowerBead can effectively?

The PowerBead can dispenses a consistent bead to speed application and reduce waste. Prepare mating surfaces by cleaning and drying them, apply an even bead, and torque fasteners to manufacturer specs; allow proper cure time before exposing to fluids or pressure.

• Clean and dry surfaces; remove old gasket material
• Apply continuous bead from PowerBead can and assemble parts
• Follow specified cure times before pressurizing or filling with fluids

Who is this for: Technicians, home mechanics, restoration shops, and anyone working on import engines or high-torque applications that require a reliable, OEM-spec silicone gasket. Permatex Ultra Grey 85084 is aimed at users who need a low-odor, non-corrosive, high-vibration resistant sealant that performs in oil- and coolant-exposed environments and stands up to demanding temperature ranges.