I agree with RV man. You won't find a better epoxy than "West System". Any yachting store has their products. You can buy a little kit that includes all the stuff necessary, but I would buy the quart can with the pump and the standard #205 hardner. The pumps are extra and come with the correct one for each of the 2 cans. No measuring, just pump an equal number of times from each can. I buy it in gallon cans because we use it for all kinds of work on our racing sailboat. They also have several filler powders available depending on whether you want strength or easy sanding. #404 for strength and #410 for ease of sanding. It is not as easy to sand as you would like, so I don't use any of that for fairing on models. For small jobs I use regular 30 minute epoxy, but for things like applying fiberglass cloth for a wing joint, West is best.