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Permatex 20539 Indian Gasket Shellac Compound: Hard Setting Economical Sealant for Sealing Common Gasketing Materials 1 x 59ml

Permatex 20539 Indian Gasket Shellac Compound: Hard Setting Economical Sealant for Sealing Common Gasketing Materials 1 x 59ml

Q: Is this good for a small outboard gearcase as a supplement to the seals ?

If it is being used to enhance the performance of gaskets, yes. You can also apply it around the outer metal edge of a seal before driving it into a casting. It should not be applied to the rubber part of a seal that contacts a rotating/moving part.

Q: I want to use this on freeze plugs, but do you apply wet, or let the product dry before setting freeze plugs in place.

Put the product on wet, drive the plug in immediately after, smear excess around circumference of installed plug. Done.

Q: Can you use this on transmission pan gaskets?

I don't see why not, but this hardens like a glue so on a paper or composition gasket you will have to tear it apart for next removal, leaving material on both sides that will have to be scraped off. Not fun! I use this on one side of a gasket, usually the machined/flat side and a non-hardening sealer on the other side, so when you take it apart, the gasket won't tear apart, and can be reused, with a fresh coating of non-hardening sealer. That is the plan anyway. It doesn't always work. My usual choice for non-hardening sealer is Aviation gasket sealer, such as Permatex #80017 or similar. It is rated up to 400 degrees F. I also use it like Anti-Size on bolts, Not Exhaust, to keep them from rusting. Keeps out the water.

Q: Can I use this on a cylinder head gasket ?

back in the older years this was the go to stuff for head gasket sealers, but now a days most head gasket makers like felpro have the sealant already on the gaskets ( like printo seal or permatorque style gaskets) so you do not need any sealer just install and torque

Product ID: 61136765

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Details

Brand
Permatex
Shape
Round
UPC
686226205391
Manufacturer
Permatex
Global Trade Identification Number

💰Economical & cost-effective

🔥Wide temp range -65°F to 350°F

🛠️Hard setting & durable seal

Frequently Bought Together

Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.

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 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red

Description

🛡️ Seal smarter, not harder — the ultimate gasket game-changer!

TEMPERATURE TOUGH - Operates seamlessly from freezing -65°F to scorching 350°F for ultimate reliability.
SEAL WITH CONFIDENCE - Hard setting formula ensures a rock-solid seal every time.
BUDGET SMART SOLUTION - Economical pricing without sacrificing premium quality.
VERSATILE PERFORMANCE - Works flawlessly on all common gasketing materials under low temp & pressure.
FUEL FLUID RESISTANT - Reliable resistance to diesel fuels and most auto shop fluids keeps your projects leak-proof.

The 20539 Indian Gasket Shellac Compound is a hard-setting, economical sealant designed for sealing common gasketing materials in low temperature and pressure environments. Resistant to diesel fuels and most automotive fluids, it offers reliable performance across a broad temperature range from -65°F to 350°F, making it a cost-effective and durable choice for professional-grade sealing applications.

Specifications

Manufacturer	Permatex Products
Part number	20539
Item Weight	45.3 g
Product Dimensions	3.18 x 9.37 x 3.18 cm; 45.36 g
Item model number	20539
Shape	Round
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No

Have a Question? See What Others Asked

Is this good for a small outboard gearcase as a supplement to the seals ?

I want to use this on freeze plugs, but do you apply wet, or let the product dry before setting freeze plugs in place.

Can you use this on transmission pan gaskets?

Can I use this on a cylinder head gasket ?

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