Liquid Castile Soap Base

Rated 4.9 out of 5
Based on 121 reviews
Regular price $12.00 Incl. GST
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A true liquid castile soap base of vegetable oil origin.  The base is palm-free, surfactant-free, unscented and handmade in New Zealand exclusively for PureNature.  It has a natural translucent pale yellow colour.

Liquid Castile has many uses! DIY Body wash and handwash, natural cleaning products etc. Can add essential oils or fragrance oils for a scented product.

Can be thickened with salt, however this does not always product a stable product.  If you are wanting a thicker gel like consistency it is best thickened by the addition of Hydroxyethylcellulose (HEC)* See below.

No Parabens
No Mineral Oil compounds
No Sulfates (SLS & SLES)
No Glycols
No Phthalates

It’s important to NEVER add vinegar to liquid soap. Vinegar is an acid and it will return the soap back to its original state – oil and water.

Ingredients: Aqua, Potassium Cocoate, Glycerin, Potassium Oleate, Potassium Castorate.

*Best thickened with HEC, for stability over a long period. Simply disperse HEC into a slurry with Glycerine, add COLD water into the slurry, and SLOWLY add the cold slurry into liquid soap base under constant mixing and heating.
Mix and heat to around 35degrees then turn off. The combination of heat and alkali (soap) will cause HEC to thicken.
Add essential oils once thickened and cooled. Experimentation is required for EOs and FOs as they have different properties and all react differently in liquid soap – eg., some might require an emulsifier to prevent clouding, while others may further thicken the soap.

Example formula for producing 1,000g (1kg) liquid soap batch.
1.  Disperse 0.1-1% (or 1-10g) HEC into 3-5% (or 30-50g) Glycerine to make a slurry
2.  Add 10-20% (or 100-200g) COLD water into the slurry and disperse
3.  Add up the amount of HEC + Glycerine + cold water you have used in steps 1-2 above.
For example 10g HEC + 50g Glycerine + 200g water = 260g. Subtract that from 1,000g, which will give the amount of liquid soap base to use (1,000 - 260 = 740g liquid soap base).
4. SLOWLY add the cold water slurry into liquid soap base while SLOWLY heating, with continuous mixing.
5. Heat to around 35 degrees, turn off and cool. Stir a few times as it cools.

This is just an example – you might find that you like to dilute the liquid soap base by 50%. It’s trial and error and will depend upon your desired consistency.

This product is intended for external use only


Ingredients Aqua, Potassium Cocoate, Glycerin, Potassium Oleate, Potassium Castorate
Potential Applications Body Wash, Handwash, Natural Household Cleaning Prodcuts
Usage Up to 100%
Palm Free Yes
Vegan   Yes
Tested on animals No
Contains GMO No
Country of origin New Zealand
Documents SDS
average rating 4.9 out of 5
Based on 121 reviews
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121 Reviews
Reviewed by Ginny C.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Liquid Castile Soap Base

Very reasonably priced. So handy to have to make cleaning recipes for a gentler but very good result.

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Reviewed by Melanie Y.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

So far so good

Bought this as it's cheaper than the well known brand out there for Castile soap, which I normally use as a foaming face wash. Haven't tried it for that purpose yet but it's great so far for foaming handwash..

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Reviewed by Yvette C.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted


This castile soap base is wonderful - I just add my favourite oils and viola!!

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