After looking up the stats of 1,1,1,2-Tetrafluoroethane (R-134a) and Dichlorodifluoromethane (R-12) it looks to me like this RED-TEK stuff (they call it R-12a) has a wider range of active temperatures, but not by much. And it's more dense, meaning it can transfer more heat. It also has a lower vapor pressure, meaning you can have more of it in the system, if I'm not mistaken. All in all, theoretically, from what I can tell this stuff would revolutionize the refrigerant market. Then again, that begs the question why doesn't it if it's as good as they claim?
Not to mention, nowhere have I found mention of a refrigerant classified as R-12a. And from what I understand through my avid, patriotic viewing of the Colbert Report, if it's not on Wikipedia-- it's not true.
Then again, it's been a whole week since the last time I was in Chem studying this sort of thing, so I might be completely off my rocker.