I am supposed to "cushion" and adhere an aluminum wing tank to a wood spar with a bead of silicone sealant before adding tank straps around the tank and spar. Of course it should be non-corrosive to the aluminum. Where do I get such stuff. I have no luck on Google because most of the manufacturers want a large order. Has anyone used the All-in-one silicone sold by Wicks? Does putting epoxy primer on the tank and epoxy varnish on the spar provide enough of a barrier for the acetic acid normally given off by typical silicone sealants? I know about felt products but I am just trying to follow the plans directions. Oh yes, the plans also call for the nose tank to rest on a bed of silicone sealant on4130 tubes. Thanks everyone.