Why use Propylene Glycol instead of Alcohol when making M&P Soap

Traditionally alcohol has been used as the solvent in making M&P soap. It works well and help produce a transparent bar, but it does some have some drawbacks. Many people have used Proplyene Glycol  (PG) in place of alcohol with great results. Below  a list of reasons why I prefer PG over alcohol

  • The price - Alcohol can be 4X as expensive as PG.
  • Alcohol (Enthanol) boils at 173.1°F; PG boils at 370.8°F
  • Alcohol like water will evaporate from the finished soap causing more shrinkage
  • Alcohol is restricted in many areas making is difficult to obtain.
  • You may need a special permit to purchase large quantities for soap making
  • You can purchase Specially Denature Alcohol (SDA) but these are also very expensive compared to PG
  • PG allows the soap to be re-meltable
  • And Finally - I prefer my Alcohol in a cocktail, not my soap

The instructions for making your own M&P soap from scratch are in the forums. Click here to register.



  1. Pams on April 26, 2018 at 11:01 AM

    Thank you now I know it is remelt-able. Good luck at the conference and have fun!.

    Question where do you get the molds used in the photo of the three flowers?


    • Dr John on April 26, 2018 at 11:09 AM

      The molds are Milky Way Molds. I bought them from Wholesale Supply Plus.

  2. DiamondEyes on May 16, 2018 at 6:31 AM

    Questions: Can other oils be used? What’s the criteria?

    • Dr John on May 16, 2018 at 8:28 AM

      Yes you can use other oils. You do need a large percentage of hard oils (Saturated). If you use a large percentage of soft oils the soap will still set up, but it will be rubbery. Using SoapCalc a hardness of around 40 will work well. You can go higher but you may find the soap drying. though you can always superfat.

  3. Rich Jans on January 22, 2019 at 12:43 PM

    OK, I’m new here. Where is the recipe for M&P base?

    • Dr John on January 22, 2019 at 1:06 PM

      The recipe is in the forums under – Making Melt & Pour Soap from Scratch.
      Dr John

Leave a Comment

You must be logged in to post a comment.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Hello World !