Pro Seal - how long until gas can touch it?

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ateamer

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ateamer
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We used Pro Seal (PPG) 1422 B2 on the fuel sender on my Cessna 175 to seal a leak. The label says 48 hours to reach 35 durometer, and the A&P said it’d be okay to to fill the tank after 24 hours. For those with experience, what is a safe time for it to be cured satisfactorily for flight ops?
 
Temperature can cause the time to vary. Personally I’d wait the 48.

Is your A& P willing to redo it if 24 leaks?
 
How warm is the hangar? IIRC every 10 degrees under 70 doubles the cure time.
 
Pro-Seal/ DeSoto products are excellent; with some caveats.

1. There are multiple varieties and not 1 size fits all.

2. They WILL all seal, but removal can be problematic. I’ve met several

aircraft where improper type was used. Removal of access panels

took way more time than cost of proper sealant. On one occasion

I bought used panels for a Tiger. They arrived after being cut out

of the skin!


3. Was the sealant applied between tank and sender or brushed on?
 
The sealant was applied between the tank and sender, like a gasket, and formed around the edge of the sender on the outside, and applied to the screws.

At this point it’s been 48+ hours, but I won’t be able to fly it until 68-72 hours anyway. The hangar has been at 60-80 degrees.
 
Will you Leak Check before flight?

Suggest fill repaired tank.

Jack opposite side.

Selector on BOTH.

Fuel will flow and completely fill repaired tank

Do not leave unattended.

Observe all safety precautions
 
Magman said:
Will you Leak Check before flight?

Suggest fill repaired tank.

Jack opposite side.

Selector on BOTH.

Fuel will flow and completely fill repaired tank

Do not leave unattended.

Observe all safety precautions
Click to expand...
That is exactly my plan.
 
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