US Part Number: 27038
Canada Part Number: N/A

Permatex® OPTIMUM RED Gasket Maker

Permatex’s New Optimum Red RTV gasket maker provides maximum temperature performance up to 750°F intermittent. The advanced formulation allows for a sensor-safe, low odor and non-corrosive performance and is resistant to oil and common shop fluids. Permatex® Optimum Red also resists aging, weathering and thermal cycling without hardening, shrinking or cracking.

  • Maximum temperature performance, adhesion, and flexibility
  • Sensor-safe, low odor and non-corrosive
  • Non-flammable and non-toxic
  • OEM Specified and meeting performance specs of OE silicone gaskets
  • Maximum Temperature performance up to 750°F (399°C) intermittent

Applications: Header, Exhaust Manifold, Turbocharge, Slip-fit Exhaust

US Item # CDN Item # Container Size Case
27038N/A3.35 oz. Tube 12
27138N/A8 oz. Power Bead 6
27238N/A13 oz. Cartridge 12
US Item # Tech Doc File
27038 TDS  SDS  
27138 TDS  SDS  
27238 TDS  SDS  
  1. For best results, surfaces should be clean and dry.
  2. Cut nozzle and apply a continuous 1/16″ to 1/4″ (2 to 6mm) bead of silicone to one surface, surrounding all bolt holes. Assemble parts immediately while silicone is still wet. Finger tighten until material begins to squeeze out around flange.
  3. Let dry for one hour then tighten to torque specifications.
  4. Allow 24 hours to fully cure before filling with fluids or returning to service.
  5. Replace cap after use.

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

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