I just added some of that red windshield de-icer to some rain-x washer fluid.The red stuff contains ethylene glycol. I've had rain-x turn to slush after it gets out on the windshield. I'll post a report when the next icy rain comes through. John Meeks '91 Vanagon MV Northern Michigan Vanagon Rescue Squad www.vanagonauts.com
On Thu, Nov 25, 2010 at 6:28 PM, Dave Mcneely <mcneely4@cox.net> wrote: > > > WRT windshield washer fluids, some products are labeled with a freezing > point, but it looks more like a "claim" than an actual fact. But, being a > water/alcohol mix, the freezing point will change over time with > differential evaporation. That's one of the reasons that ethanol gave way > to ethylene glycol as coolant system antifreeze in the 1950s. Of course, if > you knew the proportion of alcohol by weight in the windshield washer fluid, > you could calculate the freezing point depression. > > BTW, most of these windshield washer fluids are isopropyl rather than ethyl > alcohol, I believe, the same as Windex. Don't drink any. > > DMc > > David McNeely > |
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