Best long term fuel sealer

Tom-D

Tom-D

Taxi to Parking
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Tom-D
Which fuel sealer do you like?
I am trying to find a long term sealer to (glue) ? the new fuel tank gaskets. They will be bolted to the old tank flanges, and hopefully never be removed.
 
I don’t think you have to put anything on that. Did you check the manual? I usually like FuelLube on something like that, even though it isn’t required. We used it at the airlines a lot. Hard fuel panels were always sealed over top (the gap) with B1/2, but I wouldn’t put that mess on a small plane. Way too hard to get off.
 
Jdm said:
I don’t think you have to put anything on that. Did you check the manual? I usually like FuelLube on something like that, even though it isn’t required. We used it at the airlines a lot. Hard fuel panels were always sealed over top (the gap) with B1/2, but I wouldn’t put that mess on a small plane. Way too hard to get off.
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I've seen pro seal used on a lot of JP aircraft used but not on 100LL or auto fuel.

I'm going try a soak test on this stuff, any experience is appreciated.
166684_0_0
 
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Tom-D said:
I've seen pro seal used on a lot of JP aircraft used but not on 100LL or auto fuel.
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I would stay very far away from that. Mil spec approved such as fuel lube or nothing at all, and be done with it.
 
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I use EZ Turn on fittings I may need to service. Permatex works, too. Never used Permashield but I think it's made for fuel contact?
 
Tom-D said:
Which fuel sealer do you like?
I am trying to find a long term sealer to (glue) ? the new fuel tank gaskets. They will be bolted to the old tank flanges, and hopefully never be removed.
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Are the gaskets cork? None. Torque screws, let sit 24 hours then retorque the screws again, then done. No sealants needed.
 
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bnt83 said:
Are the gaskets cork? None. Torque screws, let sit 24 hours then retorque the screws again, then done. No sealants needed.
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I believe that is the best. (nothing to fail)
 
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Tom-D said:
I've seen pro seal used on a lot of JP aircraft used but not on 100LL or auto fuel.
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Then you have never seen an RV, all 10,000+ of which use it to seal their tanks.
 
Tom-D said:
I've seen pro seal used on a lot of JP aircraft used but not on 100LL or auto fuel.

I'm going try a soak test on this stuff, any experience is appreciated.
166684_0_0
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My airplane and thousands of other Cessnas, RV's, Mooneys, Cirrii, etc. have been sealed/resealed with proseal. Cessna specifies this in their maintenance manuals, but it's the same thing. https://cessnadirect.com/u544059
 
DaleB said:
Then you have never seen an RV, all 10,000+ of which use it to seal their tanks.
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Exactly,, I used tube after tube when I worked The EA6Bs and the G1s, but I do not use it in the little aircraft I work on. I'd rather replace the tank than to use the sticky goo.

OBTW- the fuel tanks of the Navy aircraft use caulking channels not pro-seal.

If your 170/172/182 has a leak I'm installing a new one.
 
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DaleB said:
Then you have never seen an RV, all 10,000+ of which use it to seal their tanks.
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Yes, wonderful stuff but oh so messy to apply.

Quite a few RV builders have use ProSeal on cork gaskets for the fuel sender plate, only to develop a leak through the cork part over time. What holds up better is a bead of ProSeal without the gasket.
 
The sender plates on my wet wing tanks use Proseal instead of a cork gasket. I think most RV tanks are done that way now.
 
wilkersk said:
The sender plates on my wet wing tanks use Proseal instead of a cork gasket. I think most RV tanks are done that way now.
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PRC plus a cork gasket is a recipe for leaks. Either cork with nothing else. Or a layer of PRC applied to both mating surfaces, assemble wet and start the screws/bolts until they just start to squeeze. Let cure fully, then torque. No stress on the parts.
 
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