Does this stuff seal pneumatic (800 psi) threads on an and npt fittings.

I’ve not used it for your application however, her is the product discription for reference Formulated for metal, tapered ppe thread fittings. Protects threaded areas from rust and corrosion. Uses: head bolts, oil senders, oil and coolant lines, fuel fittings. Features & details Cures rapidly to withstand 10,000 PSI Perfect as a replacement for Vibra-Seal pre-coated parts Prevents galling and protects mated threaded areas from rust and corrosion

Can this be used on plastic pipe

Here is a copy and paste of the product description. "Formulated for metal, tapered ppe thread fittings. Protects threaded areas from rust and corrosion. Uses: head bolts, oil senders, oil and coolant lines, fuel fittings". Hope this helps.

What's the difference between this & Special Edition? I need 2 use it 2 seal inline fuel filter thread brass fitting 4 a motorcycle tank 2 carb.

I tried a number of things to seal a brass tee into a motorcycle oil pressure outlet. Nothing worked 'til I tried this stuff. Be sure to clean the threads well beforehand. If the stuff is rated for fuel, I'm sure it'll work for your application. It's good stuff.

What's the difference between this & Special Edition? I need 2 use it 2 seal inline fuel filter thread brass fitting 4 a motorcycle tank 2 carb.

The special edition is no doubt like many other products listed on Amazon a seller attempting to use the false label of a "special edition" to lure buyers to buy from them at a higher price, without prime shipping and more often than not slower shipping. I am willing to bet if you contact the maker of the product that they do not produce a "special edition".

56521 High Performance Thread Sealant 50 Ml

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NZ$52

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Description

🔧 Seal it like a pro, lock it for life!

UNMATCHED SEAL HOLD - Combines thread sealant and blue thread locker for ultimate leak-proof security.
PRESSURE PROOF PERFORMANCE - Seals fittings airtight and watertight up to 1,000 PSI—no leaks, no worries.
CLEAN TAPE FREE APPLICATION - Replaces messy plumbers tape and pipe dope with a smooth, professional finish every time.
EXTREME TEMPERATURE RESILIENCE - Operates flawlessly from freezing -60°F to scorching 300°F without degradation.
RAPID CURE HEAVY DUTY STRENGTH - Fast curing formula handles up to 10,000 PSI, perfect for demanding industrial and automotive tasks.

Permatex 56521 High Performance Thread Sealant is a premium synthetic rubber formula that delivers a dual-action seal and thread lock. Designed for metal and tapered pipe fittings, it ensures leak-proof connections up to 1,000 PSI and cures rapidly to withstand pressures up to 10,000 PSI. Temperature resistant from -60°F to 300°F, it protects against rust, corrosion, and wear, making it the go-to choice for professionals and DIYers seeking durable, high-strength sealing without the hassle of tape or pipe dope.

Specifications

ASIN	B000FW7VHI
Best Sellers Rank	#151,307 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #147 in Fillers, Adhesives & Sealants
Brand	Permatex
Brand Name	Permatex
Colour	White
Compatible Material	Stainless Steel, Metal Alloys
Country of Publication	USA
Customer Reviews	4.7 out of 5 stars 534 Reviews
Global Trade Identification Number	00079340565210
Included Components	Auto part, Automotive Accessories, Replacement and Performance parts
Item Dimensions	20.3 x 7.6 x 5.1 Centimeters
Item Form	Liquid
Item Type Name	Thread Sealant
Item Weight	50 g
Item dimensions L x W x H	20.3 x 7.6 x 5.1 Centimeters
Manufacturer	Permatex
Material	Synthetic Rubber
Material Type	Synthetic Rubber
Style	Compact
Style Name	Compact
Surface Recommendation	Fixture
UPC	079340565210
Unit Count	50.0 Milliliters
Water Resistance Level	Waterproof

Reviews

A**R

Forget plumbers tape, this what you want

If plumbers tape was a model T Ford, this is a Ferrari. Awesome product.

31.05.2024

P**E

Buen sellador

Cumple con su objetivo

22.02.2024

K**Y

Works great

Sorted my leaking head bolts in an Ls. Used arp but the chromolly bolts don’t come with sealer like all the stock and stock replacement bolts do. Put on 3/4 of thread and install. Perfect. Further used on head plugs. Sealed up also without leaks. The stuff is incredible for automotive.

22.05.2026

E**.

Empaque abierto

El empaque del producto estaba abierto, lo cual demerita la presentación y se duda de la calidad.

25.02.2025

C**S

Does at it says it does..

Used it for my Nissan rear differential. No issues.

14.04.2026

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NZ$52

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In stock

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Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to New Zealand.

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