Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker 3 oz. - 75190
Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker 3 oz. - 75190
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Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker 3 oz. - 75190

Key item features

  • Non-Corrosive Formula: Ultra Black Maximum Oil Resistance Silicone Gasket Maker is sensor-safe with a non-corrosive formula designed for superior adhesion to oily surfaces and long-term durability.
  • Superior Resistance: Provides excellent resistance to powertrain fluids including engine oil, transmission fluid, gear lube, and coolants, ensuring a strong, long-lasting seal.
  • High Flexibility: Retains high flexibility and oil-resistant properties, making it suitable for replacing pre-cut gaskets or as a gasket maker or sealant.
  • Durable and Long-lasting: Resists aging, weathering, and thermal cycling without hardening, shrinking, or cracking, with a temperature range of -65F to 500F (-54C to 260C) intermittent.
  • Versatile Applications: Ideal for use on valve covers and valve guides, oil pans, transmission pans, intake manifold end seals, timing gear covers, and differential covers.
  • Fast-Curing: Features a fast-curing, low odor, non-corrosive formula that meets OE silicone gasket performance specs and is OEM specified.
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3.75 stars out of 5, based on 8 seller reviews(3.8)
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About this item

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Customer ratings & reviews

4.7 out of 5 stars
stars398 ratings87 reviews
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Reviews summary

Pros

  • : Forms a strong connection in different uses.
  • : Prevents leakage and withstands heat.
  • : Offers lower cost compared to others.
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Showing 1-3 of 87 reviews

Mar 1, 2026
Gil
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

This stuff is truly excellent. It will even seal small water leaks while wet\dripping. Sticks to anything like silicone but stronger. The best glue ever made imo.

Helpful?5UND0MIZ7JAG499434268
Dec 9, 2025
keith
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Good Stuff

I use this on my rear differential cover works great no leaks so far been 3 weeks so definitely recommended good product

Helpful?5UND0MIZ7JAG499434268
May 1, 2025
WalmartCustomer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

It's a good product that I've used before, walmart.com had the best price and saved me another trip to the overpriced auto parts stores

Incentivized Review
Helpful?5UND0MIZ7JAG499434268