Used clear "bathtub" clear caulk on mine. Over 100 flights logged and it's still holding on. This type of material makes good wing to fuselage joints also. Just cover the wing with plastic / apply the caulk to the fuselage and assemble. Leave for 24 hours and it will be a perfect match. Several members at the club started looking at this joint after 4 more showed up after I started flying mine. Great fun! Bill