this is what the man said that i got it from, we were talking about bad seals on the daisy 1200" I had the same problem with the co2 seal. I had to remove the old seal. I found some light rust under the seal. I then used a blue and rust remover to clean the rust off of the co2 seat. Next I made a crude seal with a small thin piece of rubber and reinstalled it. It works fine now with no co2 loss. Hope this helps you. My gun was out of commission for 10+ years. I finally made up my mind to fix it. Oh the years wasted....anyway, happy shooting!" also don't leave a c02 in your gun cause that will ruined seals real fast.