Great seal well made. I pay attention to quality and details. I used "Seal all" (yellow tubing, inexpensive) to glue the "Perfect Fit" gasket to the AC Delco Perfect Match B4 pan and reinstalled the assembly onto the gearbox. A thin continuous roller on the rim of the pan placed a spacer on the pan so the leveling lugs protruded through the pan, inverted, applied pressure with two 20 pound rods and after 10 minutes; Presto!