Multani Mitti and bentonite are the two clays people mention most often in the same breath — both are sold as raw powder, both promise to pull oil out of skin, and both show up in the same "which clay should I buy" comparisons. We sell Multani Mitti Clay, not bentonite, so this is a genuine side-by-side rather than a sales pitch dressed up as a comparison.
The short version: they're mined differently, they don't pull with quite the same strength, and one of them is a much better starting point if your skin is anything other than clearly oily. Here's how they actually differ.
• Both clays carry a natural negative charge that binds oil and surface debris — that's the mechanism behind every clay mask, not something unique to either one.
• Bentonite is generally considered the stronger, more expanding clay of the two; Multani Mitti still sits at the strong-absorber end of the range but is often the gentler introduction.
• Neither is a good starting point for dry or sensitive skin — Sampson's own product guidance says plainly to reach for kaolin or rhassoul instead.
• Sampson sells Multani Mitti and Rhassoul Clay, not bentonite — so treat the "which should you buy" section below as an honest comparison, not a push toward what we stock.
How Are Multani Mitti and Bentonite Clay Different?
Multani Mitti and bentonite are both fine, absorbent clays, but they come from different deposits and don't have identical mineral makeups. Multani Mitti — the name simply means "mud from Multan," a region now in Pakistan — is Fuller's Earth, the same clay historically used to "full," or degrease, raw wool before it was ever used on skin. Bentonite forms when volcanic ash weathers and ages over long periods; it's named after Fort Benton, Wyoming, where an early large deposit was found, though usable deposits now exist worldwide.
What they share is the part that actually does the work: both carry a net negative surface charge, so when the wet clay sits on skin it binds positively-charged sebum and grime, and rinsing carries both away. That's the whole mechanism — for Multani Mitti and for bentonite alike, per Healthline's overview of calcium bentonite clay, which describes the same "slight electrical charge" pulling toxins and oil from skin.
Which Clay Pulls More Oil From Skin?
Bentonite is generally regarded as the stronger of the two. Multani Mitti sits at the strong-absorber end of the clay spectrum and is a real oil-drawing clay in its own right — that's why it's traditionally reached for by oily and combination skin — but bentonite's montmorillonite-rich composition is widely described in the clay-therapy research literature as having an especially strong capacity to bind and lift surrounding material, which is part of why it built its reputation as the more intense "detox mask" clay (see the review by Moosavi, 2017, "Bentonite Clay as a Natural Remedy").
In practice that means bentonite dries faster and pulls harder, so it's easier to over-dry skin with it if you leave it on too long. Multani Mitti's own usage guidance is a good rule for either clay: rinse while the mask is still slightly tacky, not once it has dried to a hard crack.
Is One Better for Acne and Blackheads?
Neither clay treats or cures acne, and Sampson doesn't make that claim for Multani Mitti — what a clay mask can do is lift oil and debris out of congested pores, which some people find helps with midday shine and blackhead-prone areas when used once or twice a week. Bentonite has more published research behind it specifically: the same Moosavi (2017) review documents antibacterial and wound-healing findings for bentonite that haven't been studied for Multani Mitti in the same depth, which is part of why bentonite shows up more often in acne-specific skincare writing.
That research gap doesn't mean Multani Mitti "doesn't work" for oily, congestion-prone skin — it means the specific antibacterial studies simply haven't been run on it. If a documented antibacterial mechanism matters to you, that's a real point in bentonite's favor; if you'd rather use a single-ingredient clay with a long traditional track record for oily skin, Multani Mitti still does the basic job — pulling oil, not fighting bacteria.
Can Either Clay Be Used on Dry or Sensitive Skin?
No — not as a regular routine step. Sampson's own product notes for Multani Mitti Clay say plainly: "if your skin is dry or sensitive, this is the wrong clay — reach for kaolin or rhassoul instead." Bentonite carries the same practical caution, since its pull is at least as strong; Healthline recommends a patch test on a small, hidden area before using any bentonite mask on the face for the first time.
If your skin runs dry, combination-leaning, or reactive, our own comparison of Rhassoul Clay vs Multani Mitti covers the gentler option in more detail.
Which Should You Use as a Hair or Scalp Mask?
Both can work as an occasional oily-scalp treatment, used the same basic way: mixed into a paste, worked into the roots (not the lengths), left on briefly, then rinsed thoroughly. Sampson recommends Multani Mitti this way once or twice a month for scalp oiliness between washes — see our full breakdown in Multani Mitti for Hair: Does It Actually Work? Bentonite has its own documented history here too — Healthline notes that in Iran it's used as a traditional hair cleanser and softener.
Neither clay is a shampoo replacement for dry or normal hair — both are stripping enough that they're best reserved for genuinely oily roots.
Which Clay Should You Choose?
If you want a single-ingredient, traditional oil-absorbing clay for oily or combination skin — with no fragrance, no filler, and a long track record for congestion and midday shine — Multani Mitti is the straightforward choice, and it's the one we sell. If you specifically want the stronger pull, or the antibacterial research behind bentonite, that's a legitimate reason to reach for bentonite instead; we're not going to pretend otherwise just because we don't carry it.
Either way, the skin type test comes first: both clays are for oily and combination skin, not dry or sensitive skin, and both work best at once or twice a week — not as a daily cleanser.
Shop the Clay
Multani Mitti Clay
Single-ingredient, ultra-fine milled Fuller's Earth — no water, fragrance, or filler. Mix your own paste for oily and combination skin.
Shop now → ✓ 30-day money-back guarantee · Free shipping over $75How to Mix and Apply a Multani Mitti Mask
- Mix. Combine roughly 1 teaspoon of Multani Mitti with enough water or rosewater to form a smooth, spreadable paste, using a non-metal bowl and spoon.
- Apply. Spread an even layer over clean, oily-prone areas (or work it into oily roots for a scalp mask), avoiding the eye area.
- Rinse. Rinse with lukewarm water while the mask is still slightly tacky — not once it has dried to a hard crack — and follow with a light moisturizer.
Frequently Asked Questions
Is Multani Mitti stronger than bentonite clay?
Generally no. Bentonite is considered the stronger, more expanding clay of the two. Multani Mitti still sits at the strong end of the clay range and is often described as the gentler entry point into clay masking.
Can I mix Multani Mitti and bentonite together?
Some people blend the two to soften bentonite's stronger pull. Sampson's Multani Mitti is formulated to be used on its own, mixed with just water or rosewater.
Does Sampson sell bentonite clay?
No. Sampson currently sells Multani Mitti Clay and Rhassoul Clay. See how those two compare in Rhassoul Clay vs Multani Mitti.
How often should I use a Multani Mitti or bentonite mask?
Once or twice a week for oily or combination skin, per Sampson's own usage guidance. Using either clay more often than that risks over-drying skin.