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Permatex Ultra Black Gasket Maker - Deal
Price as of June 16, 2026 — check Amazon for the current price.
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By Patrick Smith · Updated July 10, 2026 · How we review
Permatex Ultra Black is the black, oil-resistant RTV that a generation of weekend mechanics reaches for on oil pans and valve covers — partly because it simply looks factory once cured. What the front of the tube doesn't emphasize is time: this is a moisture-cure silicone, and Permatex's own technical data sheet calls for parts to sit finger-tight while the bead skins over for about an hour, then a full 24 hours of cure before the engine returns to service. Forum mechanics who trust the seal it makes still grumble about that wait, along with a mundane failure mode nobody advertises: half-used tubes that dry out, separate, or lose their caps on the shelf. Buy it for the job at hand, not for the drawer.
Our verdict
The right pick for DIY engine sealing jobs where you can leave the vehicle overnight. Pros who need same-hour turnaround tend to reach for faster-curing products like The Right Stuff instead.
Sources & further reading
What buyers say
Our summary of recurring themes in customer reviews on the Permatex Ultra Black Gasket Maker Amazon listing (read July 2026) — not quotes or endorsements.
Most praised
Users praise its dependable, leak-free seals across oil pans, valve covers and motorcycle cases, with experienced mechanics reporting years of use without a failure.
Most common complaint
The recurring complaint is the slow moisture cure — the recommended wait before service feels impractical mid-job — plus tubes that harden, separate or lose caps in storage.
Worked best for
It worked best for patient DIY builders sealing oil-wetted joints; worst for anyone needing the engine back in service the same day.
Why buy the Permatex?
- Formulated for maximum oil resistance on oil pans, valve covers and timing covers.
- Sensor-safe, non-corrosive silicone that won't foul oxygen sensors.
- Cures to a flexible black seal that blends in on modern engines.
Hand-picked deal
One of our top trending picks in Auto & Tools.
Live best price
We link straight to Amazon so you always see today's real price.
Fast shipping
Fulfilled by Amazon — fast, often Prime, delivery.
Easy returns
Backed by Amazon's secure checkout and return policy.
Was $7.56 — prices change fast on Amazon
Price as of June 16, 2026. Tap to see the current price.
A Auto & Tools pick that earns its hype — here's the live deal on the Permatex Ultra Black Gasket Maker.
Permatex Ultra Black Gasket Maker - Deal
The black, oil-resistant RTV that seals valve covers and oil pans with a factory look — a garage staple for a reason.
Permatex Ultra Black Gasket Maker at a glance
- Product
- Ultra Black Gasket Maker
- Brand
- Permatex
- Category
- Auto & Tools
- Price
- $7.56 (as of June 16, 2026)
- Availability
- In stock on Amazon
- Condition
- New
- Shipping
- Fast, often Prime
- Returns
- Amazon return policy
What you get when you buy through Promolyze
Only the standouts
How we choose
No stale prices
Ready to check out the Permatex Ultra Black Gasket Maker?
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Frequently asked questions
How long before I can run the engine?
Permatex's data sheet specifies about an hour for the bead to skin over with parts assembled finger-tight, and 24 hours at room temperature for full cure before returning to service or refilling with oil.
Is Ultra Black really oil resistant?
Yes — oil resistance is its defining trait versus general-purpose RTVs. It's formulated specifically for oil pans, valve covers and timing covers, and it's sensor-safe.
Does it replace a gasket or just dress one?
On stamped covers and machined flanges it's designed to form the gasket itself. It's not for head gaskets or other high-pressure fiber-gasket applications.
Permatex
$7.56