The kit I bought came with new tanks, supposed to be ethanol safe. Same amber color as fiberglass, but doesn't seem to have the cloth texture, very smooth. I've decided to go ahead and put them in now. My question is what adhesive is used to glue them to the aluminum spars? It's a pretty gappy fit, would take a lot of expensive epoxy. I read through some posts on this site and saw one or two mentions of silicone. Is that a good choice? What type of silicone?