IPA Concentration

[hudson2302]

Hi all
When doing the wipedown, does the concentration of IPA matter ( 70, 80, 90 etc)
The reason I ask is I have noticed that 90% seems to leave a white film on surfaces when it dries

[dsg03gt]

I wouldn't imagine it making a difference. It would just change the dilution ratio.

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[Bunky]

I think Mike P's recommendation was 20% for all paints. I like CarPro's Eraser better..less grabby.

[3AM]

Read this:
http://www.autogeekonline.net/forum/hot-topics-frequently-asked-questions/31183-how-mix-ipa-inspecting-correction-results.html

90% is too concentrated. 10-20% is safe from what I've read.

Edit: Here is a small snippet from the article.

Another colleague in the industry coined the term Hot to describe strong solutions of Isopropyl Alcohol used to chemically strip paint.

Hot = How fast a liquid will bite into the paint, the strength of the dilution and the flash time for the liquid to evaporate off the finish.
Full strength IPA is a HOT chemical stripper, the stronger the ratio, the hotter it is.

My colleague agrees with my chemist friends that 50%, 70% and 91% dilution levels are all too strong to safely use to chemically strip paint. This person's recommendation was to stay at or below 25% dilution of IPA to water solution.

[hudson2302]

Read

90% is too concentrated. 10-20% is safe from what I've read.

Edit: Here is a small snippet from the article.

Thank you for that. The vb search sucks