The glue I use is 3M 78 spray glue made exclusively for foam. I used to purchase it at Home Depot, but they quit carrying it. As Jim says the 3M 77 will attack the foam if sprayed on too heavily. They recently changed the formula for 77 and it now contains acetone. I assume the light coats allows the acetone to evaporate as it is sprayed. If this is the case, you might want to also keep the can a good distance away from the foam as you spray. This will allow even more time for the acetone to evaporate. Not too sure about this, just my thoughts..............Seaplane