Which sealant used on fuel tanks?

[Lood]

Can someone please give me the exact name or spec of the certified sealant used during the complete strip and reseal process on Mooney fuel tanks? I have a small experiment that I'd like to carry out, but don't want to waste my time using the wrong sealant.

I've done a bit of research on the web and gathered that it must probably be one of the PRC range of sealants, but there are quite a few and I thought it might be easier to just ask the pro's here.

[Piloto]

PRC1422-A2 and PRC1422-B2. The difference between the -A2 and the -B2 is the viscosity. The -A2 will flow while the -B2 is more like a paste. The -A2 will flow easily into crevices and small openings and it will seal gaps up to 1/4". The -B2 is used on gaps greater than 1/4" and where parts are mated together such as the covers. You will also need MEK to clean the surface before application. The sealant comes in tubes and pint cans for bristtle brushes applications. The use of gloves is highly recomended whenever working with the sealant.

José

 

 

[Shadrach]

For the filets in the tanks - Flamemaster CS3204 B2 or equivalent  AMS-S-8802 formerly Mil-S-8802F Type II

For the access doors - Flamemaster CS3330 B2 or equivalent AMS 3284 Type 1 Formerly Mil-S-8784B

 You'll find that Jose's recommendation meets the above listed Mil-S-8802F Type II/AMS-S-8802 for inside of the tanks. Do not use it on access doors! 

What's your plan?

 

 

[Lood]

Quote: Shadrach

... What's your plan?

 

 

[N601RX]

The PRC 1422 is a little on the expensive side.  You can usually get some that just expired a few days ago on e-bay for a fraction of the cost of a new tube. As long is it is properly stored it is good long past it's expiration date.  I've used some on non aircraft projects that was almost 4 years past it's expiration date. It's a good idea to store it in a sealed bag in the refridgerator.   I believe there is some stripper here in the US that works good on the sealent.  I think there is a couple of threads here on Mooneyspace about it.

[Shadrach]

This what I and many others have used to remove sealent from rivit areas for patching.

http://www.rpm-technology.com/Poly-Gone.htm

It is definitly a propriatary formula. It works well when the directions are followed.

BTW - ZAR20k is pretty cheap compared to what it costs in the States...

 

 

[Shadrach]

Quote: N601RX

The PRC 1422 is a little on the expensive side.  You can usually get some that just expired a few days ago on e-bay for a fraction of the cost of a new tube. As long is it is properly stored it is good long past it's expiration date.  I've used some on non aircraft projects that was almost 4 years past it's expiration date. It's a good idea to store it in a sealed bag in the refridgerator.   I believe there is some stripper here in the US that works good on the sealent.  I think there is a couple of threads here on Mooneyspace about it.