TechWriter wrote:
StirCrazy wrote:
I just looked up the chemical compatability of Propylene glycol and rubber, it is listed as satasfactory. I have no issues using it im units, and neither do thougsands of rv dealers and service departments, its actualy recomended in my owners manual.
Chances are that those rubber seals are actually made of Santoprene. Alcohol has little effect on it.
no its pure rubber that the compatability chart is for, and you have to remember Propylene glycol is a modified alcohol so the properties arn't the same as ethanol alcohol which everyone seems to use when looking up compataibilities. now if the seals are made out of somthing different then thats even better. like I said my camper has had rv antifreeze in it every year since 1991 and seals are all still good.
Steve
