🌿 New — Dual Crystal Applicator

One Crystal.
Two Surfaces.
The Purest Deodorant
You'll Ever Use.

Side A for your face. Side B for your body. 100% potassium alum — nothing else. Refillable, plastic-minimal, lasts 12–18 months.

★★★★★ 4.8 out of 5 — 247 reviews

$27.99 USD _{/ $44.99 AUD}

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Pre-order now — ships in 4–6 weeks

🌿 One Ingredient ♻ Refillable 🚫 Zero Chemicals 🌍 Ships Worldwide

💎

100% Potassium Alum One ingredient. Nothing else.

The Problem

Your deodorant has 12 ingredients. Ours has one.

Most deodorants are a cocktail of aluminium chlorohydrate, parabens, propylene glycol, and synthetic fragrance. PURALUM is none of that. It's one mineral. It's been used for four thousand years. And it works.

Crystal stones break in your bag

PURALUM's protective silicone housing keeps your crystal safe — at home, in travel, in your gym bag.

No product is designed for your face

Side A is shaped for facial skin — a flat oval crystal surface gentle enough for cheeks, forehead and chin.

Plastic tubes end up in landfill

The PURALUM housing is reusable for years. Refill cores ship in kraft paper — no plastic, no waste.

Chemical formulas you can't pronounce

PURALUM's ingredient list: Potassium alum. Full stop. That's the entire formula.

◯ SIDE A — Face

Finally. A deodorant designed for your face.

Potassium alum has been used for centuries as a natural facial astringent and antimicrobial. Side A's flat oval crystal surface is shaped for gentle use across cheeks, forehead, chin and upper lip. Wet, apply, rinse. That's all.

Flat oval crystal surface
Gentle 3mm edge radius
Designed for facial contours
Forest green cap — ◯ symbol, face only

△ SIDE B — Body

Your underarms. Done properly.

Side B's gently convex crystal surface delivers even mineral coverage across your underarm area. The convex shape adapts to natural body contours — more effective than flat stones, less harsh than sprays. Apply after shower, every morning.

Convex oval crystal surface
Glide motion with light pressure
Designed for underarm contours
Sage green cap — △ symbol, body only

How It Works

Five steps. Thirty seconds.

💧 Wet the crystal surface

Run the relevant crystal surface under clean water for 2–3 seconds. The mineral activates with moisture.

🔄 Apply with light, even pressure

Circular motion for Side A (face). Long glide strokes for Side B (underarms). No pressing hard needed.

✨ Let your skin absorb the minerals

An invisible antimicrobial layer forms on skin, inhibiting the bacteria responsible for body odour.

🚿 Rinse the crystal after use

A quick rinse removes mineral residue and any skin contact. Keeps your crystal hygienic and ready.

🌬 Air dry before replacing cap

Replace the cap only when the crystal is fully dry — prevents moisture trapping. Stands upright on any counter.

Takes 30 seconds. Lasts all day. No white marks. No fragrance. No residue.

The Ingredient

One ingredient.
Four thousand years of use.

KAl(SO₄)₂·12H₂O

Potassium alum is a naturally occurring mineral salt. It works by creating an invisible antimicrobial layer on skin that inhibits the bacteria responsible for body odour — without blocking pores, without interfering with perspiration, and without a single synthetic chemical.

Used in traditional medicine across Southeast Asia, the Middle East, and North Africa for centuries. Barbers in Thailand used it as an aftershave antiseptic. Apothecaries across the Arab world carried it as a universal skin mineral. Rediscovered by modern consumers looking for a cleaner alternative.

PURALUM contains: Potassium alum. That is the complete ingredient list.

Read the science →

Refill System

Refillable. Not disposable.

Buy the housing once. Replace only the crystals when they wear down — typically every 12–18 months.

Crystal wears down after 12–18 months When the crystal surface becomes too thin for comfortable use, it's time for a refill core.

Quarter-turn unlocks the module Grip the housing, quarter-turn the crystal end to release. No tools needed — one simple motion.

Insert new crystal. Click to lock. Slide the new refill core in, quarter-turn to lock. A tactile click confirms it's secured.

Refill Core from $14.99 USD · Aluminium-free forever

🏠 Silicone housing is designed to last for years — not months

🌱 Potassium alum crystals are a natural mineral — fully biodegradable

📦 Kraft paper packaging only — no plastic windows, no foam inserts

♻ One refill replaces a dozen conventional plastic deodorant sticks

Customer Reviews

247 people switched to PURALUM

4.8

★★★★★ Based on 247 verified reviews

Sarah M.

Sydney, AU

★★★★★

"Finally broke up with conventional deodorant. The face application is something I never knew I needed — my pores look cleaner and I've stopped getting those tiny bumps under my chin. Side B for my underarms works perfectly after the first week of transition."

Verified purchase

James T.

New York, US

★★★★★

"Was skeptical. Tried it for a month. The crystal actually WORKS if you apply it to damp skin. The dual applicator is genuinely clever — my partner uses the face side every morning. Only product in our bathroom doing two jobs."

Verified purchase

Priya K.

Melbourne, AU

★★★★★

"Love that it's one ingredient. Took about 5 days for my body to adjust but now I'm converted. The housing feels premium — nothing like those cheap Thai crystal sticks that crack in your makeup bag."

Verified purchase

Marcus D.

London, UK

★★★★★

"Bought for the refill model. The housing is really well made and the crystals click in cleanly. No more buying a new plastic tube every few months. Side A for my face after shaving is a game changer — no razor burn at all."

Verified purchase

Emma R.

San Francisco, US

★★★★★

"The packaging alone is worth it. Forest green kraft box, feels like a luxury purchase. But the product delivers. Been using for 3 months, still on my first crystal. Side B works great for my underarms on light activity days."

Verified purchase

Aiko N.

Toronto, CA

★★★★★

"Excellent product concept. The flat side for face is genuinely different to the curved body side — you can feel the difference in use. Only reason for 4 stars is waiting for the refills to be available in my country."

Verified purchase

Rachel L.

Brisbane, AU

★★★★★

"Switched from Lume deodorant. Better on my sensitive skin, zero reactions. The two-surface design actually makes sense once you think about it — why use the same applicator on your face and your armpits?"

Verified purchase

David H.

Chicago, US

★★★★★

"Works. Simple. Refillable. That's all I needed. My wife started using the face side. 10/10 would recommend for the ingredient list alone. Best thing to come out of my bathroom cabinet in years."

Verified purchase

89%

5-star reviews

4-star reviews

247

total reviews

4.8

average rating

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Free shipping over $50 · Ships in 4–6 weeks · 30-day returns

Common questions

Yes. Potassium alum inhibits odour-causing bacteria through its natural antimicrobial mineral properties. Most users find it effective throughout the day on normal activity. For high-intensity activity, reapplication may be needed. Note: potassium alum is a deodorant, not an antiperspirant — it does not block perspiration.

Side A has a flat oval crystal surface designed for the flatter skin of your face (cheeks, forehead, chin). Side B has a gently convex oval crystal surface designed to follow the natural contour of your underarm. The caps are colour-coded (forest green for Side A, sage for Side B) and non-interchangeable by design.

Typically 12–18 months with daily use, depending on frequency and how much of the crystal surface you use per application. The crystal gradually dissolves down over time. When the crystal surface becomes too thin, simply order a refill core — the housing lasts for years.

Potassium alum is generally well-tolerated by sensitive skin. It is free from aluminium chlorohydrate, parabens, fragrances, propylene glycol, and triclosan. If you have a known mineral salt sensitivity, consult a dermatologist before use. Do not use on broken, irritated, or freshly shaved skin.

Side A is designed for facial use. Potassium alum has a long history of use as a natural facial astringent and post-shave mineral. Apply lightly to damp skin after cleansing. Do not use on broken or irritated skin. For best results, apply after washing and before any moisturiser.

A quarter-turn of the crystal module unlocks it from the housing. Slide out the depleted crystal, insert the new refill module, quarter-turn to lock — a tactile click confirms it's secured. Both Side A and Side B crystals are replaced together in the standard refill pack. The refill takes about 30 seconds.

PURALUM ships in an FSC-certified kraft paper box with a forest green interior liner. No plastic window. No foam. The applicator is wrapped in recycled tissue paper. Refill cores ship in a smaller kraft paper box. We designed the packaging to be as low-waste as possible.

Crystal refill material is sourced from cosmetic-grade potassium alum suppliers. The applicator housing is manufactured in partnership with our OEM partners. We ship from warehouses in the USA and Australia. Full supply chain transparency is available on request.

One Crystal.
Two Surfaces.
The Purest Deodorant
You'll Ever Use.

Your deodorant has 12 ingredients. Ours has one.

Finally. A deodorant designed for your face.

Your underarms. Done properly.

Five steps. Thirty seconds.

One ingredient.
Four thousand years of use.

Refillable. Not disposable.

247 people switched to PURALUM

Choose your PURALUM

Common questions

Follow @puralum

Be first to know when we restock.

One Crystal.Two Surfaces.The Purest DeodorantYou'll Ever Use.

Your deodorant has 12 ingredients. Ours has one.

Finally. A deodorant designed for your face.

Your underarms. Done properly.

Five steps. Thirty seconds.

One ingredient.Four thousand years of use.

Refillable. Not disposable.

247 people switched to PURALUM

Choose your PURALUM

Common questions

Follow @puralum

Be first to know when we restock.

One Crystal.
Two Surfaces.
The Purest Deodorant
You'll Ever Use.

One ingredient.
Four thousand years of use.