PROFESSIONAL WELDER GLUE (1 tube). Industrial strength contact adhesive. "Permanently seals, bonds and repairs." is what they say. "GREAT STUFF!" is what I say- this is the glue that i use to repair torn foam hinges on EPO foam, and even to make new hinges on EPO, like when cutting flaps into a wing. It's also a great "small part" contact adhesive, when you don't feel like using a brush. Use it like straight contact adhesive, or like the tubes of "Foam glue" that come with some planes (you don't wait for that to get too tacky before joining the parts)