How long will the product remain good after opening the bottle?

this is the second time I've bought a bottle of this product. The first one I bought from a local auto parts. When the first one ran out it was over 20 years old and still good. It will last a long time as long as you seal the lid well and don't leave it open for long periods. I use it then put the lid right back on

Is this compatible with plastic fittings? I have a diesel storage tank with 3/4" threads that leak a little and I am looking for a sealant.

I primarily use this on Triumph motorcycle cases and it is the best Permatex (or any) product for the job. I've also used it on rubber pipes to metal banjos and it worked well there too. I suspect that it would work well in your situation but I have not used it on plastic and there are so many kinds of plastic that I would test it first. Personally, on threads where gas or oil is involved, I use the yellow Teflon tape -- it seals gasoline so diesel should be no problem.

My red plastic Moeller marine portable 6 gallon fuel tank has some small gas leaks around the screw on caps - think it would be safe to use...?

It would probably be safe to use but when mine was apparently shipped in a non-pressurized airplane hold. The cap was intact but the sealer had leaked out all over. I will buy locally next time. Auto stores may have it or may be able to get it.

would this work for marine freshwater outboard motor such as water pump gasket sealer

I don't see why it won't..I used it on my oil pump ad my water pump...works great...no leaks..oil, antifreeze does not have any affect on it..Good stuff.

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Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz.

Product ID: 5575397

Details

Brand
Permatex
Item Weight
4 ounces
Item dimensions L x W x H
2.44 x 2.44 x
Material
Plastic
Style
4 oz.

⏳Slow-drying for precision

🔥Withstands -65°F to 400°F

🛢️Resists gasoline, oil & grease

€ 27.52

Duties & taxes included

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal like a pro, fly like a boss!

VERSATILE APPLICATION - Ideal for close-fitting machined surfaces, hoses, solid gaskets, and threaded connections.
AVIATION GRADE APPROVAL - Trusted by pros in aviation and automotive industries for critical sealing tasks.
CHEMICAL OIL RESISTANCE - Keeps seals intact against gasoline, oil, and grease for long-lasting durability.
PRECISION SLOW DRY FORMULA - Gives you time to perfect every seal without rush or mess.
EXTREME TEMPERATURE RESILIENCE - Reliable performance from freezing cold to blazing heat (-65°F to 400°F).

Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant is a 4 oz. slow-drying, non-hardening brush-top sealant designed for aviation and automotive use. It resists gasoline, oil, and grease, and performs reliably across a wide temperature range (-65°F to 400°F). Perfect for sealing close-fitting machined surfaces, hoses, solid gaskets, and threaded connections, it offers professional-grade durability and versatility trusted by experts.

Specifications

ASIN	B000HBM3QQ
Best Sellers Rank	#5,268 in Automotive ( See Top 100 in Automotive ) #9 in Gasket Sealers
Brand Name	Permatex
Color	White
Compatible Material	Metal
Customer Reviews	4.7 4.7 out of 5 stars (2,244)
Global Trade Identification Number	00686226800190
Included Components	Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz.
Item Dimensions	2.44 x 2.44 x 2.75 inches
Item Form	Liquid
Item Type Name	Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant, 4 oz.
Item Weight	4 ounces
Manufacturer	Permatex
Material Type	Plastic
Model	80019
Number of Items	1
Number of Packs	1
Part Number	80019
Style Name	4 oz.
Surface Recommendation	Close-fitting machined surfaces, Hoses, Solid gaskets, Threaded connections, Fuel fittings
UPC	686226800190
Unit Count	1 Count
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 27.52

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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 Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

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