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US Part Number: 81878
Canada Part Number: 59703

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.

Automobile

Suggested Applications:
Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings

Motorcycle

Suggested Applications:
Exhaust header flanges, slip fit exhaust pipes, and muffler end caps

Marine

Suggested Applications:
Exhaust manifolds/headers, valve covers, oil pans, intake manifold end seals, water pumps, exhaust tubes

US Item # CDN Item # Container Size Pack
81878597033 oz. tube, carded 12
US Item # Tech Doc File
81878 TDS  SDS

DIRECTIONS:

  1. For best results, clean and dry all surfaces with a residue-free solvent, such as Permatex® Brake & Parts Cleaner.
  2. Cut nozzle to desired bead size – gaskets are best formed using a 1/16" to 1/4" bead.
  3. Apply a continuous and even bead of silicone to one surface, surrounding all bolt holes. Remove excess with knife at once. Assemble parts immediately. Do not squeeze out silicone by over tightening bolts. Re-torque will not be necessary.
  4. Silicone dries in 1 hour, and fully cures in 24 hours, at 70˚F (21˚C) - 50% relative humidity. Allow more time in cold weather.
  5. Replace cap after use. Clean hands with dry cloth or Permatex® Fast Orange® Hand Cleaner. Clean tools with non-flammable cleaning fluid.

NOTE: Not recommended for use on head gaskets or parts in contact with gasoline.

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Tech Documents

Type the appropriate five-digit US Or Canadian part number(s) into the field and click on the Search button. If entering more than one five-digit part number, please separate by a comma. For example: 25224,25218,24010,27010

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