JB Weld is MAGIC!...A two part epoxy material that you mix together and which dries to form a hardened sealer/gluing agent for metal/metal, metal/plastic, metal/fiberglass, anything/anything joints or seals.
It comes in a package with two tubes, one epoxy, one hardener. Squeeze out equal amounts and mix together into a paste. You have a limited amount of time to then apply it as a 'hole filler', or as a 'glue' before it hardens into a sandable whole. It is to epoxy resins what Duct Tape is to plastic adhesive tape!!!!!
Available at ALL good auto parts stores!
Glyn