Hate to see you do a burn out with the rim instead of the tire. Or would that be called a burn in?

I ran mine tubeless also. Mine was a heavy street car that ran 9's with these tires. They NEVER leaked any air. I did prep them with a lot of soap on the interior of the tire. I poured it in and coated the entire inside. When it dried and some of the soap puddled on the bottom, I moved the soap around until it was all absorbed by the tire.
Eventually the tires got used up. Had them for years and sat in the garage over long winters without lossing air. BTW, these were also screwed to the rims.
Allan G.

My son and I dont run tubes. He still uses QTP Hoosier's and I am using the Hoosier radial slicks. I can tell you they never leak air. They both sat all winter and did not drop any air. They hold air good. Ron

I usually use tubes and screws, but last year I had a few runs left in my old QTP's and decided to try a new pair tubeless w/o screws in a spare set of wheels. I just checked pressure this week and had lost no air all winter. I used Palmolive dish soap in them, and NAPA bead sealer on the beads.