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forum threadn0p posted Yesterday 07:15 AM
forum threadn0p posted Yesterday 07:15 AM

Permatex 27038 Optimum Red High Temperature Gasket Maker, 3 oz $7.68

$7.68

$11

30% off
Amazon
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The Permatex high temp gasket maker, 3 Oz, got cheaper on Amazon and is $7.68 there now, while it is $11.89 elsewhere. This is used on cars to seal high heat areas, like exhaust manifolds, headers, turbo flanges, and slip fit exhaust joints, where normal gaskets or RTV would fail from heat and thermal cycling.

  • Maximum temperature performance
  • OEM Specified, Sensor-safe, low odor, non-corrosive
  • Non-flammable, non-toxic
  • Can be used as a gasket maker or dressing and meets performance specs of OE silicone gaskets
  • Top Job Applications: Header, manifold, slip-fit exhaust parts, turbocharge and withstands up to 750°F (399°C) intermittent

https://www.amazon.com/gp/product...X0DER&th=1
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Product Info
Community Notes
About the Poster
The Permatex high temp gasket maker, 3 Oz, got cheaper on Amazon and is $7.68 there now, while it is $11.89 elsewhere. This is used on cars to seal high heat areas, like exhaust manifolds, headers, turbo flanges, and slip fit exhaust joints, where normal gaskets or RTV would fail from heat and thermal cycling.

  • Maximum temperature performance
  • OEM Specified, Sensor-safe, low odor, non-corrosive
  • Non-flammable, non-toxic
  • Can be used as a gasket maker or dressing and meets performance specs of OE silicone gaskets
  • Top Job Applications: Header, manifold, slip-fit exhaust parts, turbocharge and withstands up to 750°F (399°C) intermittent

https://www.amazon.com/gp/product...X0DER&th=1

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Model: Permatex OPTIMUM RED Gasket Maker

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Sort: Lowest to Highest | Last Updated 12/14/2025, 05:31 PM
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Amazon$7.68
Blain Farm & Fleet$12.99

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Yesterday 12:42 PM
684 Posts
Joined May 2024
FeistyKite520Yesterday 12:42 PM
684 Posts
As someone who has never worked on a gasket, could I actually use this just to try to seal a leak in the top of the door? My plan currently is to put a glob of this on each side, and then place a double layer of tin foil between the two globs, and then shut the door. After it dries the layers up against each other should separate apart and then the door should open and hopefully it will stop water
Yesterday 01:03 PM
99 Posts
Joined Oct 2012
tekpc81Yesterday 01:03 PM
99 Posts
Quote from FeistyKite520 :
As someone who has never worked on a gasket, could I actually use this just to try to seal a leak in the top of the door? My plan currently is to put a glob of this on each side, and then place a double layer of tin foil between the two globs, and then shut the door. After it dries the layers up against each other should separate apart and then the door should open and hopefully it will stop water

Why not just go with caulk

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