i didn't know that grif! thanks. and another thing. the little straw like thing on the end of the great stuff bottle will get clogged if the great stuff dries in it. that happened to me because i didn't have any acetone so i had to buy a whole knew bottle! but with the new bottle i figured out that when you're done using it you and stick an unbent hanger in there and clean it all out! just a quick tip to save some $