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Permatex 56521 High Performance Thread Sealant, 50 ml

Permatex 56521 High Performance Thread Sealant, 50 ml

Q: 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

Q: 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.

Q: 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.

Q: 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".

4.7/5

Product ID: 294725653

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Details

Material
Synthetic
Brand
Permatex
Style
Compact
Item Weight
0.11 Pounds
Item dimensions L x W x H
20.3 x 7.6 x

💧Waterproof seal up to 1000 PSI

🔒Locks threads tight

🔥Withstands -60°F to 300°F

Frequently Bought Together

Permatex 56521 High Performance Thread Sealant ,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/ Hand Tools 50 ml

Permatex 85080 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, Sensor Safe And Non-Corrosive, For High Flex And Oil Resistant Applications 9.5 oz

Permatex 22058 Dielectric Tune-Up Grease, 3oz. - High Performance Dielectric Grease Used To Protect Terminals, Spark Plugs, Wiring And Other Electrical Connections Against Salt, Dirt, And Corrosion

Description

🔧 Seal it tight, hold it right — the pro’s secret weapon!

UNMATCHED SEAL HOLD - Combines thread sealant and blue thread locker for leak-proof, pressure-tight connections.
MESS FREE METAL SEALANT - Ditch tape and pipe dope; enjoy a smooth, reliable seal designed for professional-grade metal fittings.
PRESSURE PROOF PERFORMANCE - Secures fittings with an airtight, watertight seal up to 1000 PSI—no leaks, no worries.
RAPID CURE FOR HEAVY DUTY USE - Fast-curing formula handles up to 10,000 PSI—ideal for stainless steel, oil lines, and fuel systems.
EXTREME TEMPERATURE RESILIENCE - Operates flawlessly from freezing -60°F to scorching 300°F without cracking or corrosion.

Permatex 56521 High Performance Thread Sealant is a 50 ml synthetic rubber liquid that delivers a powerful, fast-curing seal and thread lock. It ensures leak-proof, pressure-resistant connections up to 1000 PSI, withstands extreme temperatures from -60°F to 300°F, and replaces traditional tape or pipe dope for metal and stainless steel fittings. Perfect for professionals and serious DIYers demanding durable, corrosion-resistant performance.

Specifications

Material	Synthetic Rubber
Brand	Permatex
Style	Compact
Item Weight	50 g
Item dimensions L x W x H	20.3 x 7.6 x 5.1 Centimeters
Compatible Material	Stainless Steel, Metal Alloys
Water Resistance Level	Waterproof
Item Form	Liquid
UPC	079340565210
Net Quantity	50.0 millilitre
Global Trade Identification Number	00079340565210
Number of Items	1
Colour	White
Surface Recommendation	Fixture
Manufacturer	Permatex
Country of Origin	USA
Model number	56521
Item Weight	49.9 g
Product Dimensions	20.32 x 7.62 x 5.08 cm; 49.9 g
Item model number	56521
Item Height	2 Inches
Item Width	3 Inches
Included Components	Auto part, Automotive Accessories, Replacement and Performance parts
Are batteries included?	No

Have a Question? See What Others Asked

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

Can this be used on plastic pipe

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.

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