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

95.61 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal like a pro, perform like a pilot!

VERSATILE APPLICATION - Ideal for close-fitting machined surfaces, hoses, solid gaskets, and more.
AVIATION GRADE APPROVAL - Trusted by pros for both aviation and automotive sealing excellence.
CHEMICAL RESISTANCE MASTERY - Defies gasoline, oil, and grease to keep seals intact under pressure.
PRECISION SEAL NO HARDENING - Brush-top formula stays flexible for perfect gasket fit every time.
EXTREME TEMPERATURE RESILIENCE - Operates flawlessly from freezing -65°F to scorching 400°F environments.

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 from -65°F to 400°F. Perfect for sealing close-fitting machined surfaces, hoses, and solid gaskets, it offers professional-grade durability and flexibility trusted by experts.

Specifications

ASIN	B000HBM3QQ
Best Sellers Rank	#4,757 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 (2,204)
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
Part Number	80019
Style Name	4 oz.
Surface Recommendation	Close-fitting machined surfaces, Hoses, Solid gaskets, Threaded connections, Fuel fittings
UPC	686226800190
Unit Count	1.0 Count
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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95.61 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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