ORIGINAL: tele1974
Hey Scott!
I have a Syssa 30cc gas engine in my Venus actually. I found the foam wing saddle tape. I totally thought you were referring to an expanding product of some sort.
The area of the belly pan fore and aft is going to require alot of fill if the wing is going seat fully secure. It's sitting on the bench now shimmed and ready for something. Think I sit and stare at it a while longer.
Is their a certain silicone that will work best? Exterior white from the depot maybe.
I would try something from the auto parts store.