I used it once to further secure 2 oz of lead fishing weights I had coated with epoxy and dropped into a small hole on the underside tail section of a nose heavy plane. I felt Ok that the epoxy would hold the weights in place, but, I made real sure with a one second blast of canned foam. This stuff expands like crazy, so caution is in order to prevent you from eploding any seams. As a secondard effect, I noticed it did a fine job of further supporting flex rods between my braces. I guess if someone forgot to put in these support braces close enough to prevent bending, the foam would be the ticket.