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.
It's your own mini foam cutting heat saw. Don’t use your wife or mom's good steak knives to stain with flame and cut your foam. Keep on her good side by purchasing this inexpensive knife and you won't even have to wash it afterwards!
We use this knife by heating it in a torch (or stove burner) to slice through foam in hard to reach places (like battery compartments).
For general foam cutting without heat, use the other knife with retractable blades- it is THE best all around foam cutting knife, period!