Castile Soap (Liquid)
Castile Soap (Liquid)
Gentle liquid soap for body, hands, and everyday cleaning
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A versatile liquid soap for personal care and household cleaning.
Made from plant-based oils, liquid Castile soap cleans by lifting dirt and oils so they can be rinsed away. It’s gentle on skin while still being effective enough for everyday cleaning, making it a practical option across body, hands, and home.
- Cleans skin without harsh detergents
- Lifts dirt and oils from surfaces and fabrics
- Suitable for body, hand wash, and general cleaning
- Works as a base in DIY liquid recipes
Plastic free • Vegan Friendly • No Added Fragrance
Why you’ll use this
Why you’ll use this
Liquid Castile soap is a ready-to-use soap that works across both personal care and cleaning. It removes dirt and oils without stripping the skin, which makes it suitable for body and hand wash - something stronger soaps aren’t designed for.
It’s also a flexible base for DIY liquid recipes, allowing you to create hand wash, body wash, dish liquid, and general cleaners using one ingredient.
This ingredient is for you if you have:
- A need for a gentle soap for skin and hands
- Too many separate products for body and cleaning
- A preference for simple, multi-use ingredients
- DIY recipes that require a liquid soap base
What makes it useful
- Gentle on skin compared to stronger soaps
- Multi-purpose across personal care and household cleaning
- Ready to use in liquid form
- Works well in DIY cleaning and body care recipes
- Plant-based and biodegradable
- Replaces multiple liquid products
- Easy to measure and mix
Ways people use it
- Hand wash and body wash
- Dish washing and general cleaning
- DIY multi-purpose spray
- Cleaning fruits and vegetables (diluted)
- Pet washing (properly diluted)
Learn more about liquid Castile soap
🔗 Ingredient library
See what you can make with it
🔗 DIY recipes
Good to know
Good to know
Made from only four ingredients
- Olive oil
- Coconut oil
- Filtered rainwater
- Potassium hydroxide (lye)
The naturally occurring glycerine is retained.
A note on temperature
Because this soap contains a high percentage of olive oil, it can go cloudy or develop white sediment when temperatures drop below about 15°C.
This is completely normal. As soon as the temperature rises again, the soap clears. There is absolutely nothing wrong with it - I promise.
Packaging details
Packaging details
Not only is this ingredient beautiful on the inside - it’s just as stunning on the outside, packaged in a premium amber glass, pharmaceutical-grade bottles.

Enjoy 15% Off
When you bundle any 4 ingredients. Discount will be applied at checkout.
Clean on Your Terms
You choose the ingredients, giving you full control over what comes into your home.
One Ingredient. Endless Uses.
No single-use products. Each ingredient works solo or together across many tasks.
Full Green Approach
Biodegradable & eco-friendly. Responsibly sourced with plastic-free packaging.
I've been using this for a year or so now, for hand and body wash and bench spray. Love the quality and knowing if my kids ate it they wouldn't get sick!
I really enjoy making my own household cleaning products - all the ingredients from Under Your Sink are top notch!!
I like to buy aussie made, made my first batch of dishwashing liquid and had soap from the website. Couldn’t be happier. The service Analise provides is outstanding.
Fantastic Service and Products
These were exactly what I’d hoped for - excellent quality, everything feels really well made. And thank you for the extra little gift. So generous and kind!! xoxo
Get Emails Worth Opening
To start, you’ll receive my quick-start guide to DIY green cleaning, plus a welcome discount for your first order.