Here's a link that you can check out. Go to it and click on to; "Tools and Techniques." Then click on to "Click here to view features" You'll find some info on sealants and adhesives and a whole host of things for the "Do it yourselfer." I'm guessing that you want to seal Genny tracks. My advise to you is stay away from silicone type caulking, and go with a good grade of regular boat caulking. After you apply the caulking and insert the bolts, have someone hold the heads of the bolts to keep it from moving while you tighten the nuts down below. Get the nuts snug but not too tight, and let the caulking set up for a day or two, and then come back and re tighten the nuts being careful not to let the bolt heads turn. Also, stay away from boat cleaning agents that have acid that can eat away the caulking. That's it. Good luck.Joe