Epoxy / Fuel Compatibility

[Blizzard]

Is there a problem putting a small dab of epoxy on the float arm where it meets the sender unit just as a little more insurance it won't come out? Don't want to do it if it will react or soften while always being submersed in fuel. Thanks

 

[BillL]

Is there a problem putting a small dab of epoxy on the float arm where it meets the sender unit just as a little more insurance it won't come out? Don't want to do it if it will react or soften while always being submersed in fuel. Thanks

Probably not, but I used some .025 safety wire there. A local A&P had some fine safety wire and I got 2 ft of .020 and .016.

 

[Dean Pichon]

Typically, as I recall, aircraft with "wet wings" use vinyl ester resin rather than epoxy. I don't believe epoxy can maintain its properties after long term exposure to fuel.

 

[flion]

Instead of guessing about other adhesives, you could probably use proseal. But 1) I've not heard of one of these coming out and 2) safety wire seems more reasonable - if you need to replace the sender, you can remove and keep the old arm.

 

[Blizzard]

I think fine safety wire is probably the safest route. Thanks for the input.

 

[f1rocket]

Typically, as I recall, aircraft with "wet wings" use vinyl ester resin rather than epoxy. I don't believe epoxy can maintain its properties after long term exposure to fuel.

Boy, I bet the owner of my Long-EZ is going to be surprised to hear that!!

Obviously it depends on the type of epoxy. All the airplanes Burt Rutan built were done so with Safe-t-poxy including the fuel tanks.