I don't know; there are many, many products associated with the name Christo Lube. You have to go to the specific MSDS for the product being used.SeaRat, thanks for the detailed response.
John C. Ratliff:However, my Scubapro Balanced Flow-through Piston first stage may not be a good candidate.
SeaRat
This, in my mind, seems to be much more of a concern that the Conshelf env fluid. I have seen the inside of a MK20 that had a significant amount out christo/tribolube that had been pulled through the piston stem and had pretty thoroughly coated the top of the piston in the IP chamber. I am sure some of this lubricant had become picked up by the gas and delivered to the diver.
Aren't christolube and tribolube PTFE based?
John