Liquid Castile Gel Base – Concentrated

Tradition, evolved. This is Castile, reimagined.

A modern take on an old-world natural classic. The next evolution of liquid soap is here at Craft 360.

🗸 Naturally thick and luxurious—without salt
🗸 High-performance lather
🗸 Clean, concentrated, and fully customisable

💧 1L of concentrate typically makes 2–3kg of finished product, depending on your desired consistency. Easily re-thickened with salt or gums if needed.

The Liquid Castile Gel Base is a next-generation soap concentrate - thickened not by salt, but by the skin-friendly power of coco-glucoside. It delivers everything you love about traditional Castile: clean ingredients, gentle cleansing, and plant-based purity - now with a more luxurious gel-like feel.

Formulated with a 36% active surfactant level, it offers exceptional cleansing in a small amount. Perfect for makers and brands who want more from their base: more control, more richness, more innovation.

Whether you’re formulating a gentle face cleanser, a rich hand soap, a silky body wash or a multipurpose household cleaner—this base adapts. Dilute, scent, colour, thicken, or infuse with botanical extracts. You’re in control.

Why It’s So Good

Born from centuries of natural soapmaking tradition and reimagined for modern makers, this thick & luxurious liquid Castile base delivers both substance and style.

• Naturally Thickened with Coco-Glucoside
  A gentle, plant-derived cleanser that gives the base its creamy gel texture - no synthetic thickeners, no salt.
  

• Concentrated Power (36% Active Surfactants)
  A little goes a long way. This rich, effective formula gives you more washes, more lather, and more customisation per bottle.
  

• Smooth & Luxurious Consistency
  Pours like a dream. Feels indulgent. Looks stunning in any bottle - whether you’re a brand or a home creator.
  

• Rooted in Tradition, Built for Now
  Crafted with saponified olive and coconut oils, this formula cleanses without compromise—kind to the skin, tough on grime.
  

• Purely Plant-Based
  100% natural, biodegradable, vegan, and free from synthetic surfactants, PEGs, or artificial thickeners.
  

💡 Whether you’re formulating skincare, baby products, pet washes, or household essentials—this is the modern Castile you’ve been waiting for.

Ingredients

INCI: Aqua (Water), Potassium Olivate, Potassium Cocoate, Coco Glucoside, Glycerin, Potassium Citrate, Olea Europaea (Olive) Fruit Oil, Cocos Nucifera (Coconut) Oil, Potassium Hydroxide, Citric Acid

Naturally derived from plant-based oils. No preservatives. No fragrance.

Crafted using traditional saponification methods.

How to Use

This base is ultra-concentrated (36% Active Surfactant Levels), so a little goes a long way. Dilute it based on your needs using distilled water and customise it with essential oils, botanical extracts, or hydrosols.

*Typical active surfactants in Low-range Liquid soaps are between: 5-10% 

*Typical active surfactants in Mid-range Liquid soaps are between: 10-20% 

*Typical active surfactants in Premium Liquid soaps are: 20%+

How to Dilute with Water 

1. Always use distilled or filtered water for dilution — this helps prevent microbial growth and maintains clarity.
   

2. Slowly add pre-measured warm water, blending gently to avoid excess foam.
   

3. Allow your diluted mix to settle overnight for best clarity and stability.
   

4. For thicker results, see Thickening Tips below.

How to Add Essential Oils to Liquid Castile Gel

*Always patch-test a small area before initial use. 

1. Choose Skin-Safe Essential Oils
Select high-quality, skin-safe oils like lavender, tea tree, peppermint, or eucalyptus.
Avoid phototoxic oils (e.g., cold-pressed citrus) or known irritants in rinse-off products.

Please note that some essential oils may thicken or thin out the mixture - add water or a salt solution gradually to adjust the consistency until your desired texture is achieved.

2. Use the Right Ratio
🗸 A general guideline is 0.5%–2% of total product weight.
For example: In 100g of soap, use 0.5g to 2g of essential oil.

Always refer to the specific usage recommendations for your chosen essential oil—some oils are more potent or sensitising than others.
⚠️ Essential oils are powerful—more is not always better. When in doubt, start low and increase cautiously.

3. Blend Gently
Add essential oils slowly into your soap and stir gently to combine.
Avoid vigorous mixing to prevent foaming.
Note: Some oils may naturally separate. A quick shake before use can help—but for a more permanent solution, see below.

Optional: Heat & Blend
To better incorporate oils:

• Warm the soap gently over low heat (~5 minutes).
  

• Add essential oils and blend with a stick blender for 30–60 seconds.
  

• Stir occasionally as it cools.
  

• Once fully cooled, transfer to a clean bottle.
  

Optional: Use a Solubiliser - For a Crystal-Clear Finish
If your soap looks cloudy or separates:

• Add a professional solubiliser, following the manufacturer’s instructions.
  

• This helps disperse essential oils evenly in the water-based formula.
  

5. Always Patch Test First
Apply a small amount to the inside of your wrist or elbow. Wait 24 hours before wider use.

Thickening: 

💡 Want to thicken it? Once you have diluted it the concentrate, you can re-thicken the base. Use natural gum-based thickeners or prepare a 20–25% salt solution (dissolve plain table salt in warm distilled water). Slowly add it drop by drop to your cooled soap while stirring gently. Stop when your desired thickness is reached—a little goes a long way.

Dilution Ratios (Guidelines Only)