I used the Astro fat cap on a old female old skool Krylon can of paint like the ones from the 70's without a Sekt Adapter ,and the paint exploded that's the last thing you need when street tagging. I also tried a NY fat cap, maybe it's the paint can valve tried cleaning cap, but to no avail. (APREPLY) From the 70s? Wow... I'm surprised it has pressure. Aerosol valves have a rubber O ring to seal the cap. It's most definitely rotted and ejecting the paint out.