Permatex® Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker

Permatex® Ultra Copper® Maximum Temperature RTV Silicone Gasket Maker

OEM specified. For high operating temperatures common in 4-cylinder, turbocharged or high-performance engines. The most advanced, high temp RTV silicone gasket available. Sensor-safe, low odor, noncorrosive. Superior adhesion. Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets. Temperature range -65°F to 700°F (-54°C to 371°C) intermittent; resists auto and shop fluids and vibration.

Unit Per Case



• High temperature resistance

• Sensor safe, non-corrosive

• Superior adhesion and flexibility

• Replaces most cut gaskets

• Improved oil resistance

• Can be used as a gasket maker or dressing

• Non-flammable, Non-toxic

• Low odor


For assembly as form-in-place gasket 

1. Remove all previous material from mating surfaces. Permatex Silicone Stripper or Gasket Remover is recommended for most materials.

2. For best results, clean and dry all surfaces with a residue-free solvent, such as Permatex Brake and Parts Cleaner.

3. Cut nozzle to desired bead size, 1/16 “ to 1/4 “ in diameter. An 1/8” bead is usually sufficient for most applications.

4. Remove cap, puncture tube or cartridge seal and attach extension nozzle.

5. Apply a continuous and even bead of silicone to one surface, first tracing the internal areas of the gasket configuration, then all surrounding bolt holes as shown below:

6. Assemble parts immediately while silicone is still wet. Secure or tighten to recommended torque specs.

7. Re-torque will not be necessary after the product has cured.

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