Borax (Natural)
Borax (Natural)
Used in cleaning and laundry products for centuries!
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A mineral cleaner for laundry, deodorising and general household cleaning.
A naturally occurring mineral salt used to soften water, boost cleaning performance and control odours - without fragrances, fillers or synthetic additives.
- Softens water to improve cleaning results
- Helps lift dirt and stains in laundry
- Neutralises odours rather than masking them
- Supports grease and grime removal
- Works across laundry, kitchen and bathroom
Plastic-free • Refillable • No fillers or fragrances
Why you’ll use this
Why you’ll use this
Borax works by softening water and stabilising pH, which helps soaps and surfactants clean more effectively. It also helps control odours and loosen dirt, making it especially useful in laundry and soaking solutions.
It’s a well-known ingredient in DIY laundry powders, deodorising soaks and general-purpose cleaning where you want consistent results without overpowering chemicals.
This ingredient is for you, if you have:
- Hard water that limits cleaning performance
- Laundry that holds onto smells
- A preference for fragrance-free, low-tox cleaning
- Too many single-use cleaning products
What makes it useful
- Naturally occurring mineral salt
- Softens hard water to improve cleaning efficiency
- Enhances soap and detergent performance
- Helps neutralise odours
- Septic-safe and biodegradable
- Breaks down naturally after use
- Replaces multiple specialised cleaners
- Concentrated and cost-effective
Ways people use it
- DIY laundry powders and boosters
- Laundry soaks for odours and buildup
- Deodorising bins, drains and cloths
- General household cleaning
- Supporting grease removal when paired with soap
- TIn crafts to make slime
Learn more about borax
🔗 Ingredient library
See what you can make with it
🔗 DIY Recipes
Good to know
Good to know
Borax is effective and widely used, but it should always be handled with care like any active cleaning ingredient.
- Not suitable for use on delicate fabrics
- Always test first on coloured fabrics and surfaces
- Avoid prolonged skin contact
- Wear gloves for extended use
- Store in a cool, dry place away from moisture
- Keep out of reach of children and pets. Harmful if ingested
Used correctly, borax is a reliable, multi-purpose cleaner that supports simple, effective green cleaning.
Packaging details
Packaging details
Everything is packaged fresh to order, and you can choose how your borax arrives:
Apothecary Jar
A wide-mouth glass jar with a tinted amber finish. The lid holds roughly a tablespoon, making it practical for scooping and measuring. Airtight, durable and bench friendly.
Earth Bag
A compostable kraft paper bag with a plant-based inner lining. Ideal for transport and low waste, but not suitable for long-term storage. Transfer to a sealed container on arrival - glass is best.
Whichever option you choose, keep it dry, sealed, and stored safely out of reach of children and pets.

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.
Borax is a powerhouse product great at removing stains. I use in my toilet, bathroom, kitchen and wash to help lift grime easily
Great
Great size for so many cleaning solutions
Love the eco friendly packaging
great product
I’ve bought several products from Under Your Sink since I’ve decided to do as much of our cleaning greener. I’m impressed by the packaging (brown paper bags), I’m close by so I can pick up, and I’d never go back to non-green cleaners, not even eco cleaners. I’ve used them for cleaning the bathroom, including shower screen and loo, in the laundry for normal washing and oxygen bleaching, and I’m about to make dishwasher tablets. We have a worm-farm black water system so using worm friendly products is important.
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.