R12 vs R134 ...... HC12a

[Arryn Milne]

Yeah, and if you have a leak in the evaporator core, you might want to 
refrain from smoking...


At 08:26 PM 5/12/01 -0700, CL Wong wrote:
>yes,
>this stuff was called many things such as HiCool,
>HC12a but they all had the same ingredients: propane
>and isobutane.  EPA will not approve of this mixture
>for vehicular use because it's flammable and arguably
>explosive in the right circumstances.
>
>There's plenty of sites on the net which discuss
>making your own using an R12 side tapper on a can of
>isobutane found in camping stores (cooking fuel) and
>adding some propane in some ratio which now escapes
>me.  The mixture is an excellent refridgerant and
>produces duct temperature readings much colder than
>R12 or R134a.
>
>Caution must be taken in attempting to use this stuff.
>  Besides the flammability concerns you will likely
>piss off anyone who tries to recycle your
>refridgerant.
>
>
> >Steve Sherman spsherm at attglobal.net said:
> >Although it has been a year or two since I looked
> >into this, I recall a company that was selling an R12
>
> >compatible replacement.  It was a
> >mixture of propane and butane and some other
> >unspecified gases
>
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