Hmmm...I don't know what'cha got there, but I use 505, I'm not seeing that on the label anywhere, but I don't bother with the windows when I'm using it. But other things people have told me to vent the room and I usually forget to....hmmmm. My can does say to keep away from heat and I store it close to the heater vent....that's probably not good?? So maybe I'm not the best person to listen to on this one. lol :lol: