It is non flammable according to the can.  Some of the other replacement
"freons" do contain propane. According to EPA rules you need to change
fittings and re-lable so that during evacuation it doesn't get mixed with
another type of refrigerant.

Hotch
Richard Hotchkiss
http://www.hotstrings-inc.com

> From: Samuel Scott <SamSco@AOL.COM>
> Reply-To: SamSco@AOL.COM
> Date: Wed, 14 May 2003 11:01:32 EDT
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Cost of Freon R12
>
> In a message dated 5/14/2003 9:40:16 AM Eastern Daylight Time,
> hotch@HOTSTRINGS-INC.COM writes:
>
>> Try to find a place that uses Freeze 12.
>
> Richard -
>
> Freeze 12, I believe, is a butane-based product and is a bit risky to use.
> If you ever decide to have your A/C serviced or are selling your van, it's
> important to let them know there's Freeze 12 in the system.
>
> Sam
> '89 & '91 Carats
> Also Philly
>