X eleventybillion for Gummi Pflege! I used it about a month ago on the firebird's door, hatch and T-Top seals, and she weathered a hammering by Mr. Hurricane Ike last week with NO leakage. Until now I had random leaks here and there on the passenger side rear floorboad and in the trunk area, but this stuff seems to have done the trick. Of course, making sure everything was closed securely helped a bit before, but with the hammering by the high winds and heavy rain, I am VERY impressed.