My RTV seal has not leaked in 13 years. Note that the plane is in a hangar except sun and fun and Oshkosh.
Prep fuselage flanges by cleaning with solvent. Then lightly scuff flags to provide a mechanical bond. Clean with solvent again. Apply even bead RTV along middle of flange. Circle each nut plate with enough that the rtv will be squished into the nut plate when secured.
Wax bottom contact edges of panel then apply strips of household stretch wrap over RTV. Wax screws and screw panel in place. Next time you open it remove stretch wrap
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average
speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
St.Thomas, Ontario Canada, CYQS