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

🔥Wide temp range -65°F to 400°F

🛢️Resists gasoline, oil & grease

¥3857

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Description

🛠️ Seal like a pro, perform like a pilot!

FUEL GREASE PROOF - Engineered to resist harsh chemicals like gasoline, oil, and grease for lasting durability.
VERSATILE APPLICATION - Ideal for close-fitting machined surfaces, hoses, solid gaskets, and threaded connections.
BUILT TO BRAVE EXTREMES - Operates flawlessly from freezing -65°F to scorching 400°F environments.
PRECISION SEAL EVERY TIME - Slow-drying formula lets you perfect the seal without rush or mess.
AVIATION GRADE RELIABILITY - Approved for aviation and automotive use, trusted by pros who demand the best.

Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant is a slow-drying, non-hardening brush-top sealant designed for high-performance sealing in aviation and automotive applications. Resistant to gasoline, oil, and grease, it withstands extreme temperatures from -65°F to 400°F, making it perfect for close-fitting machined surfaces, hoses, and solid gaskets. Trusted by professionals, it ensures durable, chemical-resistant seals that keep your machinery running smoothly.

Specifications

ASIN	B000HBM3QQ
Best Sellers Rank	#4,621 in Automotive ( See Top 100 in Automotive ) #10 in Gasket Sealers
Brand	Permatex
Brand Name	Permatex
Color	White
Compatible Material	Metal
Customer Reviews	4.7 out of 5 stars 2,248 Reviews
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
Item dimensions L x W x H	2.44 x 2.44 x 2.75 inches
Manufacturer	Permatex
Material	Plastic
Material Type	Plastic
Model	80019
Number of Items	1
Number of Packs	1
Part Number	80019
Style	4 oz.
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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¥3857

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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