My Review of The Big Detox Mud Mask by Fourth Ray Beauty

Can Fourth Ray Beauty's wash-off mask really work? I put it to the test to see.
Updated on: September 10, 2025

Image courtesy of Fourth Ray Beauty

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This is not a paid or sponsored review. All opinions are the author's own. Individual experience can vary. If you click on links we provide, we may receive compensation.

Fourth Ray Beauty may not yet have the household recognition of the legacy giants but within skincare circles its playful yet ingredient driven formulas have earned a loyal following and more than a few shelfie cameos. The brand thrives on affordable innovation and invites users to treat skincare as both science and self care, a balance I appreciate.

Enter The Big Detox Mud Mask, a product whose name feels equal parts spa session and superhero catchphrase. According to the brand it is designed to hit the reset button on congested complexions with a blend of bamboo charcoal and kaolin clay that promises smaller looking pores and a clearer healthier finish. I spent a full two weeks applying it exactly as directed to see if this detox lives up to its bold moniker and if it deserves a spot in your routine.

What is The Big Detox Mud Mask?

The Big Detox Mud Mask is a wash-off mask designed to sit on the skin for a short period then be removed completely with water. Wash-off masks offer a temporary but concentrated treatment window that can deliver active ingredients without the need for prolonged wear, making them useful when you want a quick reset rather than an all-night commitment.

This particular formula relies on two classic purifiers: kaolin clay and bamboo charcoal. Kaolin is a naturally occurring clay with fine particles that can bind to surface oil while remaining gentle enough for most skin types. Bamboo charcoal is known for its porous structure that helps pull debris from pores. Together they target excess sebum and the buildup that can make skin look dull or congested.

Beyond the clays the mask includes a low level of glycolic acid for mild chemical exfoliation, plus tea tree and eucalyptus oils that lend a noticeable cooling sensation. Plant extracts like licorice root and calendula round out the supporting cast, aiming to calm potential irritation from the active ingredients.

Fourth Ray Beauty markets the mask as a way to leave skin clearer and smoother after just one use. The directions recommend applying a thin layer to clean skin, allowing it to dry for five to twenty minutes, then rinsing thoroughly. Frequency is flexible, which makes it easy to slot into a weekly or as-needed routine.

Did it work?

In the name of science I benched my regular clay mask three days before starting this trial, a move that felt very lab-coat of me despite the absence of actual credentials. Fourteen days struck me as a fair window to spot meaningful change so I worked the mask into my evening routine every other night, settling on the ten-minute mark for dry-down since that kept the tingle pleasant rather than prickly.

First application brought the predictable cooling rush from tea tree and eucalyptus; pores looked marginally tighter once I rinsed but the effect was subtle and wore off by morning. By the third session I noticed smoother texture along my nose and chin where congested bumps usually linger. The glycolic acid seems low enough to dodge irritation yet high enough to coax away surface roughness, a balance I appreciated.

Midway through the two weeks the mask felt like a reliable quick fix after sweaty workouts. Surface shine dialed down without the tight, squeaky aftermath cheaper clay formulas can leave. Still, any glow boost was short lived. I did not see a cumulative brightening or dramatic pore shrinkage, just a temporary reset that held for about a day and a half.

By day fourteen my skin was neither miraculously transformed nor upset. I logged no breakouts, flaking or redness and the occasional blackhead did look a touch shallower after each use. That said the overall clarity of my complexion mirrored my baseline once I skipped the mask for a couple of days, suggesting benefits are situational rather than long range.

So did it deliver? Partly. The Big Detox lives up to its promise of quick surface smoothing and oil absorption but stops short of the deeper detox its name suggests. I will likely reach for it when I need a fast pre-event polish though it will not earn a permanent spot in my personal lineup. If your goal is an easy, budget friendly refresh it could still be a welcome cameo in your masking rotation.

Main ingredients explained

At first glance The Big Detox reads like a greatest hits album for oil control and gentle exfoliation. Kaolin clay forms the base, prized for its fine particle size that absorbs excess sebum without pulling every drop of moisture. Alongside it sits bamboo charcoal whose porous structure acts like a sponge for surface grime, making the duo an efficient if short lived reset button for clogged pores.

Glycolic acid appears next and while the concentration here feels mild it still dissolves dead skin bonds quickly enough to reveal smoother texture after a few uses. Because glycolic is an alpha hydroxy acid it may heighten sun sensitivity so SPF becomes non-negotiable on masking days.

The formula leans on a trio of essential oils for its signature cool tingle: tea tree, eucalyptus and peppermint. Tea tree carries well documented antibacterial credentials that can help calm budding breakouts whereas eucalyptus and peppermint mainly deliver that spa like vapour hit. All three are present in small amounts yet those with very reactive or sensitized skin may prefer a patch test.

Calming counterweights show up in licorice root extract, calendula and willow bark. Licorice is valued for soothing redness and a gentle brightening nudge thanks to its glabridin content. Calendula brings anti inflammatory flavonoids while willow bark supplies natural salicylates that lightly exfoliate and can reduce oiliness without the intensity of a standalone BHA serum.

Glycerin sneaks in early on the ingredient list as a classic humectant pulling water to the upper layers so skin never feels desert dry once the mask rinses off. Dimethicone and a sprinkling of tourmaline powder round out the texture story giving the mask its smooth glide and slight pearlescent finish.

Those checking for pore clogging culprits will be relieved that the blend is mostly non comedogenic which means the components are unlikely to block pores. PEG-12 dimethicone and the plant oils used here have reputations for sitting lightly on the skin though very acne prone users should still monitor for personal triggers.

Animal by-products are absent so both vegans and vegetarians can apply with a clear conscience. As for pregnancy safety the presence of essential oils plus exfoliating acids puts this firmly in the “ask your doctor first” category. When in doubt skip or substitute until you receive professional clearance.

Finally the preservative system relies on phenoxyethanol and caprylyl glycol which keep the formula stable without parabens. The scent is entirely from the listed essential oils and dissipates after rinsing. Overall the ingredient deck balances oil control with mild resurfacing making it a solid occasional treatment for combination to oily skin types looking for a quick revival.

What I liked/didn’t like

After two weeks of testing here is the no frills rundown.

What works well:

  • Light creamy clay texture glides on evenly and rinses clean without leaving residue
  • Delivers an immediate mattified finish with noticeably smoother texture for a day or so
  • Balances oil absorption with glycerin so skin feels fresh not stripped and the price point stays accessible for routine use

What to consider:

  • Results fade quickly so consistent use is needed to maintain the effect
  • The cooling hit from tea tree eucalyptus and peppermint may not suit very reactive or sensitised skin
  • Pore size and overall clarity show only modest improvement which may fall short for those seeking a stronger detox

My final thoughts

After clocking a fortnight with The Big Detox Mud Mask I land at a solid 7/10. It does the basic clay mask duties quickly and without fuss, giving combination and oily skin an instant but short lived smoothness. I would tip it to a friend who wants an affordable, no drama wash off option for pre event polish or post workout de-slicking, as long as they understand it is a maintenance player rather than a transformational star. Dry or highly reactive skin types should probably look elsewhere for their weekly treat.

If you love the ritual but want alternatives, I have a few favorites that deliver a similar reset while tailoring the finish slightly differently. Deascal’s Pink Clay Glow Mask is my current allrounder: it exfoliates, clears pores, brightens and somehow leaves every skin type I have tested it on feeling balanced rather than parched. For a deeper purge the Rare Earth Deep Pore Cleansing Masque by Kiehl’s still earns its cult status thanks to Amazonian clay that genuinely decongests stubborn T-zone buildup. When I need a budget friendly chemical-plus-clay hit the Salicylic Acid 2% Masque by The Ordinary keeps breakouts in check without stripping. And for a gentler botanical approach the Instant Detox Mask from Caudalie tempers oil while adding a subtle glow that lingers a bit longer than most.

Before you slather anything new please remember a few fundamentals. Always patch test (sorry to sound like an over-protective parent) and respect any tingling or redness as your skin’s way of setting boundaries. Consistency matters too; wash off masks give fleeting results so factor regular use into your wider routine if you want to keep the clarity you see on rinse off night.

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