RE: Frequently asked questions about Seaplanes
A great way to water proff the wing saddle is to put a bead of silicone all around the wing saddle,(after good cleaning of saddle) then line that with waxed paper, (no wrinckles) then mount and tighten the wing. Let it set overnight. Remove the wing and gently pull off the waxed paper. The silicone will not stick to waxed paper. Now you have a nice silicone gasket seal around the wing. That's how I do it, works great. Just my 2 cents.
John