I've used the 'perfect fit' like shown by PilotFighter and the epoxy/micro balloons method, and on a 2 stroke (and most 4 bangers too) glow engines the oil still gets between the wing and the fuse, the wing tape seals that and will NOT allow any oil residue in at all (even on 150+ mph planes) and the wing tape takes a whole 30 seconds to install on both sides, and NO MESS so you don't have to wait long hours while silicone cures and you don't have silicone all over the place. I've seen the silicone used by allot of people and it's just not visually appealing at all to me, i guess if they'd of took the time for the perfect fit then used it, it might of had a better outcome but I've yet to see one that way.

kc