I do not know if it would hurt O-Rings or not.Though it may work out for a springer. Do NOT use a grease in a PCP, CO2 gun, or Pumper. For those a liquid oil is important.I just got my Crosman 101 back, and whoever had it for the last 18 years had used a grease of some kind, now I am in the process of tearing it down to clean it up, and replace all seals that have been damaged, form gunk not getting cleaned out (thanks to the use of grease).