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Thread: Isopropyl and shellac - downsides?

  1. #1

    Isopropyl and shellac - downsides?

    Are there any downsides to using isopropyl instead of denatured alcohol with shellac? Hard to find denatured around here, but it's easy to get 99% isopropyl. Can isopropyl damage the wood in any way? It does a number on some plastics etc.

  2. #2
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    Are you sure it's not 91%.
    That's the highest percentage I've ever seen.
    I always am able to find both at drugstores and supermarkets.

  3. #3
    Just don't use rubbing alcohol (which is partly IPA and partly water).

    IPA will dry slower than ethanol (denatured). This can actually be helpful when brushing or padding, because it gives you a tad more time. However, it is also not quite as efficient at dissolving flakes, so that can take longer than ethanol.

    IPA is in fact slightly less aggressive a solvent than ethanol, so if your IPA is damaging plastics, etc, then so too will the ethanol.

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    Last edited by Bill Jobe; 12-08-2018 at 4:42 PM.

  5. #5
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    Quote Originally Posted by Bill Jobe View Post
    Are you sure it's not 91%.
    That's the highest percentage I've ever seen.
    I always am able to find both at drugstores and supermarkets.
    The 99% is very hot stuff. Not all that much use that I have seen other than cleaning flux from solder joints in electronics work. I've looked for it before at the supermarket and not found it.
    Dojo Kun, 1: Be humble and polite.

  6. #6
    Quote Originally Posted by Bill Jobe View Post
    Are you sure it's not 91%.
    That's the highest percentage I've ever seen.
    I always am able to find both at drugstores and supermarkets.
    Here in Canada, 99% isopropyl is easily found (you can get 2L for ~$10 at Costco), but good luck finding DNA...

    Thanks to all who replied.

  7. #7
    Quote Originally Posted by Tyler Bancroft View Post
    Here in Canada, 99% isopropyl is easily found (you can get 2L for ~$10 at Costco), but good luck finding DNA...

    Thanks to all who replied.
    Look for Bioflame denatured ethanol,sold as fuel for tabletop fireplaces. Canadian Tire,Rona and Home Hardware all carry it.Costs about $8/litre and works well with shellac flakes.Same thing as denatured alcohol.

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