[richalex2010]

Yeah, Aeropoxy (and other brands; can't think of them right now) is really awesome. And it actually helps hold together rockets that can break mach three and/or reach FL 300 (30,000 feet) in seconds.

West System and other brands are also really good, and cheaper (not sure about how much cheaper). Polyester isn't so great (pretty much anything you find cheaply), and neither is "hobby" stuff (which is actually more expensive if you need a lot of it; this is anything that you mix with 50:50 proportions).