and i found out why it wouldn't keep vaccum.. one of the holes for the rod in the imcr plates didn't stick bcuz i forgot to scuff it. all the other are in tact and trust me they are not coming out. i grabbed a pick and a hammer to see how strong that stuff was and it just made little chips on the stuff. so i did an outer coating with gasket maker called the right stuff and filled in the holes with that stuff too. right now i'm waiting for it to dry.