I used 3M Super 77 for a long time, in the past I purchased it from Lowe's or Home Depo, I just purchased some from Wal-Mart and something has changed. Use the last of my old spray can and didn't have any problem but I just used the new can and it attached the foam. Either 3M has changed the formula or what is sold at Wal-Mart is not the same, which is hard to believe. I do know you need to spray it about 6 - 8 inches from the foam, which I did, so in conclusion I'm will now use something different.