The Versatile Uses of Isopropyl Alcohol: From Cleaning to Cosmetics
Isopropyl Alcohol in Soap & Bath Bombs: Prevent Soda Ash & Perfect Your Finish
99% IPA — your DIY secret for flawless soap, crack-free bath bombs, and pro-level results
Isopropyl alcohol (IPA) — commonly known as rubbing alcohol — is a powerful, multi-use compound in natural crafting. In soap and bath bomb making, 99% IPA is the gold standard for preventing soda ash, eliminating bubbles, and achieving a smooth, professional finish. This Australian DIY guide covers the science, safety, and pro techniques for using IPA in your projects.
What is Isopropyl Alcohol?
C₃H₈O — a colourless, volatile solvent with rapid evaporation and strong antimicrobial action. Available in 70%, 91%, 99% concentrations.
Why 99% IPA for Crafting?
- Zero water: Prevents premature fizz in bath bombs
- Fast evaporation: Leaves no residue
- Strong solvent: Dissolves CO₂ → blocks soda ash
Science: Soda ash = Na₂CO₃ formed when lye reacts with CO₂ in air. IPA creates a protective film that blocks this reaction.
IPA in Soap Making
1. Prevent Soda Ash
Problem: White, powdery film on cold process soap.
Solution: Lightly mist 99% IPA over surface 5–10 minutes after pouring.
2. Eliminate Bubbles
Spray immediately after pouring to pop surface bubbles for a glass-like finish.
3. Smooth Melt & Pour
Mist between layers to improve adhesion and reduce air gaps.
Pro Tip: Use a fine mist sprayer — too much IPA can cause cracking.
IPA in Bath Bomb Making
1. Bind Without Fizz
70% IPA + witch hazel (50:50) as a non-activating binder in humid climates.
2. Prevent Cracks
Mist outer surface lightly after unmoulding to seal and harden.
3. Smooth Finish
Spray mould before packing for easy release and glossy look.
Other Household & Cosmetic Uses
- Glass Cleaner: Streak-free windows
- Electronics: Safe for screens, keyboards
- Hand Sanitiser Base: 70% IPA + aloe
- Deodorant: IPA + essential oils
IPA Safety:
• Use in well-ventilated area
• Highly flammable — no open flames
• Wear gloves for prolonged use
• Store in cool, dark place
• Use in well-ventilated area
• Highly flammable — no open flames
• Wear gloves for prolonged use
• Store in cool, dark place
Shop 99% Isopropyl Alcohol
500 mL | 1 L | Australian Made | Cosmetic Grade
500 mL | 1 L | Australian Made | Cosmetic Grade