In my experience, the spray on deicers deice the window, then quickly
promote frost formation as they evaporate.  Same if I try to deice using
the windshield washer (and the two products, washer fluid and deicer are
the same stuff -- isopropyl alcohol).  So, to me it is just money and
effort wasted.  Use a scraper and/or the defogger.  Dave Mc

On Thu, Jan 7, 2010 at 12:09 PM, Rocket J Squirrel wrote:

> "Promote" as in to encourage, to favor, to advance, to foster, or to
> incite.
>
> I don't know whether rust can be incited much. But it doesn't take
> much
> encouragement for it to get into seam rusting.
>
> Different companies have different formulations for windshield
> de-icers.
> Usually an alcohol, and sometimes with propylene or ethylene glycol.
> Not
> sure what the effect of a glycol would be if it crept into and decided
> to
> take up residence in body seams.
>
> I just want to check before spraying that stuff on the windshield.
>
> --
> Mike "Rocket J Squirrel" Elliott
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> 74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
> Bend, OR
> KG6RCR
>
>
> On 1/7/2010 9:49 AM craig cowan wrote:
>
>> I don't know how it would "promote" it,
>> isn't it just a concentrated aerosol alcohol?
>>
>> -Craig
>>
>>
>> On Thu, Jan 7, 2010 at 11:38 AM, Rocket J Squirrel
>>