This method is probably more complicated than it needs to be but here goes.

I use “Super Clear” Scotch packaging tape (because I already had it!) But working with this tape is kind of like working with contact cement…you get one shot at applying it.

So I use a six inch putty knife to position the tape. I do this by folding a piece of “Super Clear” lengthwise over the end of the putty knife and taping it down with regular masking tape. The “Super Clear” is sticky side out.

Deflect the aileron and carefully position the putty knife onto the hinges, then close up the aileron. Remove the masking tape from the putty knife and trim the “Super Clear”

It generally takes four pieces to seal the aileron. The tape is absolutely invisible, permanent and if installed right to the hinges, offers no resistance.