a strip of fiber glass cloth is what you need,2"wide and 1 to 2 oz.weight should be enough,wrap the joint then epoxy or thin ca applied on the cloth will do the job. If using ca thin cover a finger with wax paper and rub the ca in before it dries to get a good bond.Tower Hobbies, Hobby Lobby,LHS also hardware stores and auto supply stores sometimes have the cloth.