Wing skin - pro seal - section 31

[JoeB15]

On page 32 or section 31 it says to seal the overlaps with pro seal. Has anyone done this step? I don’t understand how sealing After riveting is going to work….wouldn't you want to add some pro seal Before you rivet?

 

[dwollen89]

The picture in the bottom right corner seems to show the sealant under the top skin only. So I agree, it would need to be done before the top skin is riveted

 

[TShort]

The way I read that they just wanted us to push some proseal into the gap where the joggle of one skin overlaps the other. Sort of push some in and form a small fillet there. I agree, though - doing it during assembly would probably be better. I scuffed and primed the overlaps on mine.

I wondered also why there are not spacers on some of these other skin overlaps - as on the J stringers near the tank. On the aft spar inboard overlap there is a definite bend in the skin that I think would have benefitted from a couple of those spacers

 

[Louise Hose]

I did it in the last couple of days with no problem. I sharpened a popsicle stick to a point, made up a tiny bit of old, out-of-date Proseal on a little pallet, then used the stick to slather it onto the required area where the skin is bulged a bit by the overlap. I used the pointed end to try to push the Proseal into the gap. Then, I wiped the area off so that just the overlap area retained the Proseal. I also carefully used Acetone to clean the skins of Proseal. In one case, I reapplied because I visually saw that I hadn't pushed the Proseal into the gap well enough. It was very simple and easy.

 

[JoeB15]

I did it in the last couple of days with no problem. I sharpened a popsicle stick to a point, made up a tiny bit of old, out-of-date Proseal on a little pallet, then used the stick to slather it onto the required area where the skin is bulged a bit by the overlap. I used the pointed end to try to push the Proseal into the gap. Then, I wiped the area off so that just the overlap area retained the Proseal. I also carefully used Acetone to clean the skins of Proseal. In one case, I reapplied because I visually saw that I hadn't pushed the Proseal into the gap well enough. It was very simple and easy.

That’s perfect - thank you!