Think of these three as strengths of the same idea. Bentonite is the strongest oil absorber, kaolin the mildest, and multani mitti sits between them. Most people who find clay masks leave their skin tight and irritated are simply using one that is too strong for them — usually bentonite, bought because it sounded more powerful.
The Comparison
| Multani Mitti | Bentonite | Kaolin | |
|---|---|---|---|
| Also called | Fuller's earth | Indian healing clay | China clay |
| Oil absorption | Strong | Very strong | Mild |
| Best for | Oily, combination, acne | Very oily, congested | Dry, sensitive, mature |
| Frequency | 2× a week | Once a week max | 2–3× a week |
| Sensation | Cooling, tightening | Strong pull, tingling | Barely noticeable |
| Metal bowl | Avoid | Never | Avoid |
Multani Mitti — the Default for Indian Skin
Fuller's earth, rich in montmorillonite, aluminium silicate and magnesium. Historically used to degrease raw wool — which tells you exactly what it does.
Suits: oily, combination and acne-prone skin, and the humid Indian climate. It is cooling, which is a genuine comfort in summer.
Not for: dry, sensitive or mature skin — it emphasises fine lines and takes moisture the skin cannot spare.
Use: 2 tbsp multani mitti + rose water, 10–15 minutes, twice a week.
Bentonite — Strong, and Usually Too Strong
Formed from volcanic ash, with a strong negative electrical charge, which is where the claim about "drawing out" impurities comes from.
Honest note on that claim: the electrical-charge explanation is real chemistry, but the leap to "pulls toxins out of your skin" is marketing. What it demonstrably does is absorb oil, very effectively.
Suits: genuinely very oily skin, congested pores, body acne.
Do not: use it more than once a week, use it on dry or sensitive skin, or ever mix it in a metal bowl — its charge reacts with metal.
If clay masks have always left your face tight and stinging, this is probably the one you were using.
Kaolin — the Gentle One
The mildest cosmetic clay, and the one used in most commercial masks.
Suits: dry, sensitive, mature and easily irritated skin. Also good for anyone who wants a mask more than twice a week.
If clay has never worked for you because it always irritated, kaolin is where to start.
The Indian Alternatives Worth Knowing
Two traditional options that are not clays but do a similar job:
Besan (gram flour)
Mild, cleansing, suits sensitive and dry skin. Gentler than any of the three clays. This is what most Indian grandmothers actually used.
Ubtan
A blend rather than a single ingredient — typically besan, turmeric, sandalwood and herbs. Cleanses, mildly exfoliates and does not strip. Sugandhi Ubtan, and Baby Bath Ubtan for infants.
Rules for Any Clay
- Never let it dry completely. Rinse while slightly tacky. A cracked, dry mask is pulling water out of living skin.
- No metal. Glass, ceramic or wood.
- Choose the right liquid. Rose water for oily, curd for normal, honey or milk for dry. Never lemon juice — too acidic, causes irritation and photosensitivity.
- Moisturise after. Always, including oily skin.
- Patch test before first use.
- Do not use over broken or actively inflamed skin.
Which Should You Buy?
- Oily or acne-prone, Indian climate → Multani mitti
- Very oily, congested, back acne → Bentonite, once a week
- Dry, sensitive or mature → Kaolin, or besan
- Combination → Multani mitti on the T-zone only
- Unsure → Multani mitti. It suits most Indian skin, it is inexpensive, and it is easy to buy.
- Babies and young children → none of these. Use a baby ubtan.
What No Clay Does
- Lighten skin tone. It improves clarity and evenness, which reads as brighter.
- Shrink pores permanently. Pore size is genetic; clearing them makes them look smaller.
- Remove blackheads completely. It helps loosen them. It is not an extraction.
- Clear cystic acne. That needs a dermatologist.
- "Detox" your skin. Skin does not accumulate toxins that a mask removes.
Frequently Asked Questions
Can I mix two clays?
Yes — bentonite with kaolin moderates the strength, which is a good approach for combination skin.
Why does my skin sting with bentonite?
Too strong for you. Switch to multani mitti or kaolin.
Is multani mitti safe daily?
No. Twice a week maximum.
Can I use clay on my hair?
Yes, as a scalp treatment for very oily scalps. Keep it off the lengths — it is drying.
Does the clay expire?
Dry clay keeps for years in an airtight container. Once mixed with liquid, use immediately.
Where to Buy
Multani Mitti Powder · Sugandhi Ubtan · Skin Care range
For external use only. These statements have not been evaluated by the Food and Drug Administration. Not intended to diagnose, treat, cure or prevent any disease. Patch test before first use.
