Header banner
Revain logoHome Page
πŸ”₯ permatex 81878-12pk ultra copper high heat rtv silicone gasket maker, 3 oz. (pack of 12) logo

πŸ”₯ Permatex 81878-12PK Ultra Copper High Heat RTV Silicone Gasket Maker, 3 oz. (Pack of 12) Review

3

Β·

Average

Revainrating 3 out of 5Β Β 
RatingΒ 
3.0
πŸš™ Car Fillers, Adhesives & Sealants, πŸ› οΈ Car Care

View on AmazonView on Π―M

Media

(1)
img 1 attached to πŸ”₯ Permatex 81878-12PK Ultra Copper High Heat RTV Silicone Gasket Maker, 3 oz. (Pack of 12)

Description of πŸ”₯ Permatex 81878-12PK Ultra Copper High Heat RTV Silicone Gasket Maker, 3 oz. (Pack of 12)

Most advanced, high temp RTV silicone gasket available. Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets. Sensor-safe, low odor, and non-corrosive with superior adhesion. Temperature range -75F to 700F intermittent. Suggested Applications: Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    0
  • 2
    0
  • 1
    1

Type of review

Revainrating 1 out of 5

Burns up with high temps

This product failed to meet my expectations as an automotive sealant. It claims to withstand high temperatures, yet it failed to do so in my car. The sealant broke down and actually caused damage to the area I applied it. The only positive was its ease of application. Unfortunately, that doesn't make up for its lack of performance. I would not recommend this product for any automotive use.

Pros
  • Can withstand high temperatures up to 650Β°F
Cons
  • Not suitable for low temperature applications

Revainrating 5 out of 5

Perfect fit for silicone 3D printer boots

This was the first time I made something out of silicone myself. I was a little scared but figured that a single component silicone hose couldn't be too harsh. I printed a mold for my Geeetech A20M OG hotend from Thingiverse and squeezed some of this paste onto it. After about a day (with some heating in between) the mold was ready. I've had the best results "painting" a small amount of dish soap around the shape with a brush. The cured product is flexible and has withstood many hours at…

Pros
  • Consistent test results
Cons
  • Annoyed

Revainrating 5 out of 5

Great product but be sure to let it heal.

I used Permatex as a double safety net for my new headers. I smoothed both sides of the gasket in a thin layer. My mistake the first time was not letting the Permatex cure. I jumped in the car 30 minutes after installing it and sped down the freeway. DO NOT do this, it will burn the Permatex and render it ineffective. After the pad would inevitably burst due to improper curing, I installed new pads with Permatex and this time let them dry for 24 hours. (light driving, idling). A month later I…

Pros
  • Like everything before
Cons
  • sad packaging