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Permatex 56521 High Performance Thread Sealant, 50 ml

by Permatex See the Amazon Page for this brand
4.9 out of 5 stars  See all reviews (21 customer reviews)

List Price: $16.99
Price: $10.59 & FREE Shipping on orders over $35. Details
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Size: 50 Milliliter
  • Formulated specifically for metal, tapered pipe thread fittings
  • Replaces other tape and pipe dopes
  • Prevents galling and protects mated threaded areas from rust and corrosion
  • Cures rapidly to withstand 10,000 PSI
  • Suggested Applications: Stainless steel fittings, head bolts into through holes, oil PSI sending units/sensors, oil and coolant lines, intake manifold switches, rear axle fill plug, fuel fittings

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Product Details

Size: 50 Milliliter
View Technical Data Sheet [PDF]
  • Product Dimensions: 1.5 x 3.8 x 8 inches
  • Shipping Weight: 1 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B000HBM72Q
  • Item model number: 56521
  • Average Customer Review: 4.9 out of 5 stars  See all reviews (21 customer reviews)
  • Amazon Best Sellers Rank: #238 in Automotive (See Top 100 in Automotive)
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Product Description

Size: 50 Milliliter

Permatex High Performance Thread Sealant is formulated specifically for metal, tapered pipe thread fittings and replaces tape and pipe dopes. Prevents galling and protects mated threaded areas from rust and corrosion. Cures rapidly to withstand 10,000 PSI.


Customer Questions & Answers

Customer Reviews

4.9 out of 5 stars
(21)
4.9 out of 5 stars
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Most Helpful Customer Reviews
10 of 10 people found the following review helpful
5.0 out of 5 stars Best stuff on the market December 15, 2009
Size Name:50 Milliliter|Verified Purchase
used when installing a fuel pressure sender into a 7th supply line (for 7th injector) on my v6 pickup. Also used it when making air tight seals for my air compressor (overkill maybe, but works great!).

I'm trying to find other threads that need to be sealed just so I can use it more.
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4 of 4 people found the following review helpful
5.0 out of 5 stars Great sealant... May 8, 2012
Size Name:50 Milliliter
Like the other reviewer, I use this for both automotive and general garage needs... I actually stumbled upon it sitting in my toolbox and had an air hose leak that was bugging me for a while because I am horrible with the sealant tape and applied a little bit and tightened everything down and no more hissing... A good idea is never overkill. Can't go wrong with the permatex line-up, I use this and anti seize lube religiously.
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4 of 4 people found the following review helpful
5.0 out of 5 stars The best thread sealer! February 19, 2012
Size Name:50 Milliliter|Verified Purchase
I have used this brand/type thread sealer in many applications from intake bolts, head bolts, and even under the water line on hulls. I`ve never had any issues with removing any hardware using this product! recommend it hands down!
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1 of 1 people found the following review helpful
5.0 out of 5 stars best I have ever used June 5, 2013
Size Name:50 Milliliter|Verified Purchase
I have used this thread sealant on both auto coolant lines, and air compressor
fittings, and it comes through with no leaks in both.
Addendum:
Recently I noticed the intake line on my whole house water filter leaking AGAIN!
This has been a problem for over eight years, and I just put up with it until today,
and figured; why not, the Permatex sealed everything else.
It took care of this never ending leak like it was never a problem.
This stuff is beyond great.
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1 of 1 people found the following review helpful
5.0 out of 5 stars used for oil plugs December 21, 2012
Size Name:50 Milliliter|Verified Purchase
This seems to work great on oil plugs - they don't leak the slightest amount whereas with
no sealant some tend to seep oil.
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1 of 1 people found the following review helpful
5.0 out of 5 stars Awesome December 7, 2012
By jason
Size Name:50 Milliliter|Verified Purchase
Great seal and you don't need to use much of it either. no problems with this yet, even holds up to the heat of valve covers.
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2 of 3 people found the following review helpful
5.0 out of 5 stars good stuff September 19, 2012
By TJH
Size Name:50 Milliliter|Verified Purchase
This sealant is of professional quality. I use it on my Harley and I don,t use just any ol thing on it. Highly recommended.
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2 of 3 people found the following review helpful
5.0 out of 5 stars Best sealant going. August 6, 2012
Size Name:50 Milliliter|Verified Purchase
This pipe sealant/thread lubricant is the only thing I use. It really seals threaded fittings vs. Teflon tape.The anerobic. Chemistry is the secret. Absence of air /presence of metal kicks in the cure of the product. Loctite is industry leader with adhesives and sealants....
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Most Recent Customer Reviews
5.0 out of 5 stars Best thread sealant on the market.
OE spec'd by Nissan, works great for anything that needs thread sealant. No more dealing with Teflon tape, or other sealants.
Published 1 day ago by Esteban Perez
5.0 out of 5 stars Stopped oil leak on drain plug
Worked perfectly on my Harley oil drain plug. Tried other methods and this product was the one that stopped the oil leak.
Published 2 months ago by Mimi
5.0 out of 5 stars Head Bolts
I haven't run the motor that this was used for however, I liked the pliability, consistence and the way it lubricated the threads for easy Torque wrench applications. Read more
Published 3 months ago by Michael Llanos
5.0 out of 5 stars Excellent Auto Thread Sealer
This has worked great for sealing oil drain plugs for automotive use.Not expensive and much easier to work with than the tape sealant
Published 6 months ago by E.R. Garnett
5.0 out of 5 stars Perfecto
This product worked perfectly on my fuel fittings. I was impressed how nicely the fittings seated with this sealant. . .
Published 7 months ago by Dr. James Williamson
5.0 out of 5 stars Simple way to seal a wetsuit
I have a wetsuit I've used for many seasons waterskiing.

It probably gets a bit of extra wear when I crash - which happens sometimes. Read more
Published 8 months ago by E. Kreipe
4.0 out of 5 stars 50ml is a lot
The ones you find at your local auto supply stores are usually the high-temp version and comes in a tiny tube. Read more
Published 9 months ago by JPN850R
5.0 out of 5 stars This bottle is huge!!!
I bought this because what i thought was the same product at my local autoparts store was a dollar more. I didnt realize the amount I'd receive for the price. Read more
Published 9 months ago by Js
5.0 out of 5 stars A good general purpose thread sealant.
This is a very good general purpose Thread Sealant. I like the way the nozzle opens with a twist of the cap. Read more
Published 10 months ago by S. A. ROBBINS
5.0 out of 5 stars Used on Turbo Buick Application
This is the stuff to use when doing head gaskets, just retap the threaded hole in the head to clean the old sealant off spray some electric cleaner in the holes and blow it out... Read more
Published 10 months ago by C. Frantz
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Size: 50 Milliliter