It's a pre-wash treatment. Finely milled volcanic pumice lifts away the flakes, scales and product build-up that shampoo leaves behind, while salicylic acid loosens what's stuck around the follicle. Underneath that, tamanu, avocado and grapeseed oils calm the irritation and put moisture back in. Exfoliate, soothe, nourish — in one step, two or three times a week.

Most of what you've tried was a shampoo. Shampoo runs over the top of build-up and rinses out in ninety seconds — it never gets underneath the layer causing the problem. The scrub is a different job entirely: it physically clears that layer first, so anything you use afterwards can actually reach your scalp.

If it still doesn't work for you, you've got 60 days to tell us and get your money back.

The scrub is made for flaky, itchy, congested scalps — whether that's stubborn dandruff, dryness, or the build-up that comes from styling products and hard water. It's a cosmetic treatment for how your scalp looks and feels, not a medicine.

If you've been given a diagnosis or you're on a prescription, keep your doctor in the loop and check with them before adding anything new to your routine.

1. Wet your hair thoroughly, roots to ends.
2. Work a small amount into the scalp in slow, circular motions — think massage, not scrubbing.
3. Leave it on for a few minutes.
4. Rinse with warm water, then shampoo as normal.

Two to three times a week while you're clearing things up. Once a week after that to keep it that way.

Most people say their scalp feels cleaner and calmer after the first wash. Visible change to flaking usually takes two to three weeks of consistent use, because you're waiting on skin to turn over, not just washing something off. Our customers get their best results by making this part of the routine rather than treating it as a quick fix.

A little extra flaking in the first week or two is normal — that's loosened build-up coming away, not the product making things worse. Keep going.

It's built for sore scalps. Salt scrubs sting because salt dissolves into broken skin — we use finely milled pumice instead, cushioned in a base of soothing oils, so it stays cool rather than sharp.

If your scalp is broken, bleeding or raw from scratching, wait until it's closed over before exfoliating. And if you're nervous, patch test behind your ear for 24 hours first.

No. There are no plastic beads or coarse grains to snag on, and the formula has enough slip to glide through hair without tangling.

Yes — it's sulfate-free, so it won't strip your colour. It works on the scalp rather than the lengths, and clearing away dulling residue and hard-water minerals often leaves colour looking brighter than it did.

Fine, thick, straight, curly or coily — the scrub is working on the skin, not the hair. Section damp hair and apply directly to the scalp so the exfoliants land where they're needed.

It's a favourite in the curly community, where heavy styling products are usually what's behind the irritation in the first place.

No. The pumice is milled fine enough to rinse away with warm water — no grit left behind, no gritty sound when you towel dry. Rinse thoroughly first, then shampoo as usual.

The working ingredients are volcanic pumice, salicylic acid, tamanu seed oil, avocado oil, grapeseed oil, turmeric root oil, panthenol and grapefruit seed extract. Lavender, ylang ylang and orange peel oils give it its scent.

No sulfates, no parabens, no steroids, no synthetic fragrance. The full INCI list is in the ingredients panel further up this page — worth a read if you have a known sensitivity, particularly to essential oils.

Yes. It's a pre-wash step, so it slots in ahead of whatever you already use — and clearing the build-up first tends to make everything after it work better.

If you've been prescribed something by a doctor, don't stop taking it to try this. Talk to them first.

Four to six weeks at two to three washes a week. Longer once you drop to weekly maintenance. The formula is concentrated, so a small amount covers the whole scalp — most people use far less than they expect on the first go.

Not at all. There's no minimum and no contract. You can pause, skip a delivery, change how often it arrives or cancel outright from your account at any time, and it takes about thirty seconds.

If you'd rather just buy one jar and see how you get on, choose the one-time option instead.

Then you get your money back. You've got 60 days from delivery to email support@metalxu.com and we'll sort your refund — you don't need to have anything left in the jar.

Full terms are on our returns page.

Orders ship from our Idaho warehouse with tracking. US delivery takes 5–8 business days; international orders take 7–18 business days. You'll get tracking by email as soon as it leaves us.

International customers may be charged import duties on arrival — those are set by your country, not by us.