It isn't just for fuel tanks.. We used it matting steel to aluminum, pressurized areas, Lap seams, and on repairs. Use (fuel resistant ) FR primer if you have it and some of that sealant. It will last longer than you.Originally Posted by Mike Switzer
Last edited by RV8505; 05-31-2012 at 11:40 AM.
OK, thanks. Learn something new every day.
The plus is your not married to it like POR 15. You can remove sealant with a little elbow grease and a plastic scraper. Unlike P0R-15 you would have to sandblast or strip to remove it
Back in 94 I sandblasted a pickup frame & painted it with POR-15 - then I had to take a job out of town & never got back to the project. It has been sitting in Dad's side yard ever since & still looks like it did the day I painted it.
JC5a is a non-hardening chromate corrosion inhibiting paste that can be smeared on critical bolts, rivets and mating surfaces prior to assembly.
Almost anything that physically separates the metals with a non-conducting layer will be effective, but you need to consider deterioration and inspectability if it's in a critical area.
A conversion coating like alodine will further help prior to priming etc.
In the composites business with carbon structures in contact with aluminum, the alum is sacrificial galvanically. In the presence of moisture, a galvanic cell between the materials will force the alum to corrode away. That's why you never place alum rivets into a carbon structure.
To prevent this cell from starting, a simple layer of fiberglass between the carbon and alum will act as an insulator and prevent contact and corrosion. The glass is usually placed into the carbon laminate if you know where the alum will contact. if you have to do a field setup, then a wet layer of glass, maybe .005" thick, placed at the junction will work well. There are many coatings available which also act as electrical isolators but the glass works best.
Good one Mark! Another fine PRC product!
PRC-Desoto 6 OZ Sealant
JC5A is a one-part, non-curing, corrosion inhibitive compound. It can be applied to removable fasteners and assemblies to prevent the ingress of moisture and to provide protection from galvanic corrosion. JC5A is paste-like in consistency, allowing for easy application by brush, roller or spatula. It will remain permanently fluid and is resistant to aviation fuels (jet fuel and aviation gasoline) over a wide temperature range.
Gee, if you are using Cessna parts, why waste time trying to be smarter than them? Bolt the things together like Cessna do and use your "thinking cap" time on something that needs that time.
Cheers from Oz
Cessna rivets them into an aluminum bulkhead assembly, my structure is steel.
Do you have any pictures?
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