Rustic Strength

[REFILL] Ultra Concentrate Castile Soap

Please note that we no longer sell this product, but we want to make sure you still had access to the product's information.

Refills do not come with a container! You can choose to use your own containers when refilling OR use one of our containers. To learn how to order refills, visit our How to Order page.

This soap is designed for extra long-lasting use, unlike most castile soaps on the market that are thin or watery!

Regular Price/oz
Regular Price/oz
Sale Price/oz
Refill Container Approximate Volume Needed for
  • mL
  • tbsp
  • fl oz
  • cup
  • gal
Not sure what your refill container volume is? Learn how you can find out here.

A little goes a long way | The signature honey-like tone and thickness you see are a result of the ultra-concentration. This soap is designed for extra long-lasting use, unlike most Castile soaps on the market that are thin or waterySee the difference for yourself. We highly recommend dispensing with a pump.

See the "Replacement For" section to learn how you can use this soap!

Other Values

  • More concentrated than leading Castile brands
  • Dilute for many uses
  • No harsh chemicals
  • GMO-Free
  • Organic Trade Association

Organic oils + more | Crafted with organic oils, organic aloe, water, potassium hydroxide, and citric acid. Coconut oil is used for its cleaning and lathering properties, sunflower and olive oil for a soothing, gentle feel, and castor for additional lathering and fluffy bubbles. The blending of organic aloe adds a soft and hydrating finish. 

Toxin + Irritant Free | Ditch the toxins and irritants found in most soaps. Our Castile Soap is hypoallergenic and completely dye-free ∙ perfume-free ∙ SLS-free ∙ SLES-free ∙ sulfate-free ∙ paraben-free ∙ phthalate-free ∙ 1,4-dioxane-free ∙ ethoxylated alcohol-free ∙ optical brightener-free ∙ filler-free ∙ petroleum-free ∙ palm oil-free ∙ gluten-free ∙ hormone disruptor-free ∙ carcinogen-free — and simply worry-free.

    Replacement For

    • Multipurpose Cleaner
    • Pet Wash
    • Makeup Remover
    • Cleaning Artists Brushes
    • Wound Cleaning
    • Deodorant
    • Dish Soap
    • Window Cleaner
    • Baby Wipe Solution
    • Shampoo
    • Face Wash
    • Body Wash
    • Hand Soap
    • Shaving
    • Foot Bath
    • Laundry Detergent
    • Bath
    • Sinus Decongestion
    • Toilet Cleaner
    • Ant Spray
    • Fruit & Veggie Rinse
    • Teeth Cleaner
    • Play Spray for Bugs
    • Makeup Brush Cleaner
    • Mouthwash
    • Scouring Scrub
    • Mop Floors
    • AND MORE!

    How to Use

    1. For full instructions on how to use this castile soap, please visit Rustic Strength's blog post.

    Care Instructions

    Store at room temperature and away from children's reach.


    • Water
    • Coconut Oil
    • Extra Virgin Olive Oil
    • Castor Oil
    • Sunflower Oil
    • Aloe
    • Potassium Hydroxide
    • Citric Acid

    BOLD = Organic

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