Great Planes Pro Epoxy 30-Minute Formula 9 oz GPMR6047
This epoxy comes from a rather unusual source, as the company is a Radio Controlled Airplane manufacturer. However, they have an excellent epoxy adhesive, which I suspect is manufactured for them by someone else. One of the great things about this adhesive is the 30 minute working time, which is ideal for some more complicated assembly operations. There are times when five or six minutes just isn't enough. The cured epoxy retains some flexibility, so you don't need to worry about it fracturing or coming loose from vibration or flexing. This product is designed so that you can use it with milled fiberglass, fiberglass cloth or microballoons to increase the strength or act as a gap-filling adhesive. The epoxy comes in twin four ounce bottles.