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Permatex Aviation Form-A-Gasket No. 3

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4 oz. Can #3H1 Pt. Can #3D
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Overview

Slow-drying, non-hardening brush-top sealant approved for use in aviation as well as automotive applications. Temperature range -65°F to 400°F (-54°C to 204°C); resists gasoline, oil and grease.

Application: Close-fitting machined surfaces, sealing hoses, solid gaskets
   
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

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Reviews

Always reliable, works great Continental and Lycoming, when required

Reina A Verified Purchase

Permatex Aviation Form-A-Gask #3 #3H

July 17, 2024

Richard S Verified Purchase

Permatex Aviation Form-A-Gask #3 #3H

December 12, 2023

I was looking for the orange sealant this one said it was orange its not. Doing some test strips now to make sure it is going to do what I want. Looks like good stuff though.

Joe I Verified Purchase

Permatex Aviation Form-A-Gasket #3 #3D Pint Can

March 28, 2022

Awesome

John D Verified Purchase

Permatex Aviation Form-A-Gask #3 #3H

March 11, 2022

Dont use much but works great.

Andy K Verified Purchase

Permatex Aviation Form-A-Gask #3 #3H

March 10, 2022

Using Permatex #1, #2, and #3 over the years with great success, Pleased.

Steven B Verified Purchase

Permatex Aviation Form-A-Gask #3 #3H

February 15, 2022

Great product, We use it almost exclusively for sealing gaskets. Or even just to hold them on during assembly. I love the brush in the cap. Each one of my techs have one on their box.

Bens M
March 11, 2018

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: I bought a 4oz container of what is labeled as Permatex Aviation Form-A-Gasket Sealant Liquid It does not say #3. Is it the same compound as the larger container pictured (16oz) which does say #3 on the label?

Correct, there is not a #3 labeled on the 4 oz bottle. We did confirm with the supplier that this is the correct #3H as they verified on the master case it came in and also cross referencing #80019 in which is labeled on the bottle.

Q: What is the shelf life of Permatex3?

3-1/2 years

Q: What is the difference in Permatex Aviation Form-A- Gasket 1 v 2 v 3?

#1, Dries fast, sets hard for sealing permanent or rigid assemblies.

#2, is a non-hardening, heavy-bodied, pliable sealant for semi-permanent assemblies.

#3, is a Slow-drying, non-hardening brush-top sealant approved for use in aviation as well as automotive applications.

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