Rare Earth Deep Pore Cleansing Masque
Rare Earth Deep Pore Cleansing Masque
Product Description
Product overview
A purifying clay mask by Kiehl's formulated with 90% Hydro-Activated Clay Blend including Fairly Traded Amazonian White Clay and Bentonite Clay. Draws out excess oil, dirt, and impurities to visibly minimize pores and blackheads while Aloe Vera and Oatmeal soothe skin for a refined, smooth complexion.
Deep Pore Purification
90% Hydro-Activated Clay Blend with Amazonian White Clay and Bentonite draws out impurities, excess oil, and debris from clogged pores.
Texture & feel
SENSORYDeep Pore Purification
90% Hydro-Activated Clay Blend with Amazonian White Clay and Bentonite draws out impurities, excess oil, and debris from clogged pores.
Clinically Proven Results
Reduces clogged pores by 37% immediately and 44% in two weeks. Reduces surface oil production by 46%.
Soothing Botanicals
Aloe Vera and Oat Kernel Flour calm and hydrate skin during the masking process, preventing over-drying and irritation.
Fairly Traded Sourcing
Amazonian White Clay is responsibly sourced from local communities near the mouth of the Amazon River in Brazil.
Safety & compatibility
SAFENo retinoids, salicylic acid, hydroquinone, or chemical sunscreens. All ingredients are considered safe for use during pregnancy and breastfeeding.
Contains Cetearyl Alcohol and Caprylic/Capric Triglyceride which are fatty acid-based and may feed malassezia yeast. Lecithin may also be soy-derived. Patch test recommended if you are prone to fungal acne.
Clay-dominant formula absorbs oil rather than adding it. Cetearyl Alcohol (comedogenic rating 2) and Caprylic/Capric Triglyceride (rating 0-1) are present in small amounts and rinsed off. Very low risk of clogging pores.
Free from fragrances, parabens, alcohols (drying type), sulfates, silicones, and common allergens. EWG rates this product as Low Hazard.
No animal-derived ingredients appear in the INCI list; however, the brand does not carry an official vegan certification. Lecithin source may vary.
Safe to use alongside retinol, vitamin C, AHAs, and BHAs. As a wash-off mask, it has minimal interaction risk with other actives in your routine.
Ingredient breakdown
INGREDIENTSKaolin (Amazonian White Clay) ~25-35%Proven
A gentle, highly absorbent white clay sourced from the mouth of the Amazon River in Brazil. Known as "Magic Earth," it has been used for centuries by native Brazilians for its purifying and stress-relieving properties. Absorbs excess sebum without stripping essential moisture.
- Function: Oil absorption, pore cleansing, gentle exfoliation
- Source: Fairly Traded from Amazonian communities in Brazil
- Comedogenic Rating: 0 — will not clog pores
Bentonite ~15-25%Proven
A powerful natural clay with a unique negative ionic charge that attracts positively charged impurities like bacteria and toxins. Excellent at absorbing sebum, unclogging pores, and creating an instant matte finish. Rich in minerals that support skin health.
- Function: Deep cleansing, oil absorption, antibacterial action
- Research: Studies suggest bentonite can help calm skin infections and soothe allergies
- Comedogenic Rating: 0 — non-comedogenic
Glycerin ~2-3%Proven
One of the most well-researched and effective humectant moisturizers in skincare. Naturally present in skin, glycerin attracts water to the upper layers of the epidermis, helping to maintain hydration even during the drying clay mask process.
- Function: Humectant, moisture retention, skin barrier support
- Research: Extensive studies confirm glycerin improves skin hydration and barrier function
- Comedogenic Rating: 0 — safe for all skin types
Aloe Barbadensis Leaf Juice ~0.5-1%Proven
Sustainably sourced Aloe Vera extract packed with Vitamins A, C, and E. Known for its anti-inflammatory, soothing, and wound-healing properties. Counterbalances the drying effects of clay ingredients and helps calm any potential irritation.
- Function: Anti-inflammatory, soothing, moisturizing, antiseptic
- Research: Well-established benefits for skin calming and hydration
- Comedogenic Rating: 0 — non-comedogenic
Avena Sativa (Oat) Kernel Flour ~0.5-1%Proven
Finely ground oat flour with a long history of use in dermatology for its anti-itch and skin-soothing properties. Provides gentle physical softening while delivering beta-glucans that help calm reactive skin and support barrier repair.
- Function: Skin soothing, anti-itch, mild emollient
- Research: FDA-recognized colloidal oatmeal as a skin protectant
- Comedogenic Rating: 0 — non-comedogenic
Allantoin ~0.1-0.5%Proven
A gentle, non-irritating compound that promotes skin healing and cell regeneration. Works synergistically with Aloe and Oatmeal to keep skin comfortable during masking and accelerate recovery after deep cleansing.
- Function: Skin protectant, healing promoter, anti-irritant
- Research: Clinically recognized for wound healing and skin soothing
- Comedogenic Rating: 0 — suitable for all skin types
Tocopherol (Vitamin E) ~0.1-0.5%Proven
A powerful antioxidant that helps protect skin from free radical damage caused by environmental stressors like pollution and UV exposure. Also acts as a natural preservative to extend the product's shelf life.
- Function: Antioxidant protection, formula stabilizer
- Research: Extensive evidence supporting anti-aging and protective benefits
- Comedogenic Rating: 2 — low risk, especially in rinse-off formulas
Propanediol ~3-5%Promising
A naturally derived corn sugar glycol that serves multiple functions: improves skin hydration, acts as a solvent for other ingredients, and boosts the efficacy of the preservative system. Creates a pleasant sensory experience.
- Function: Moisturizer, solvent, preservative booster, texture enhancer
- Source: Derived from corn sugar via fermentation
- Comedogenic Rating: 0 — non-comedogenic
19 ingredients
Water, Kaolin, Bentonite, Propanediol, Glycerin, CI 77891 (Titanium Dioxide), Caprylic/Capric Triglyceride, Cetearyl Alcohol, Zea Mays Starch (Corn Starch), Phenoxyethanol, Ceteareth-20, Caprylyl Glycol, Xanthan Gum, Ethylhexylglycerin, Tocopherol, Lecithin, Aloe Barbadensis Leaf Juice, Avena Sativa Kernel Flour, Allantoin
Where it fits in your routine
ROUTINEUse 2–3 times per week after cleansing, on damp skin. Follow with toner and moisturizer. Can also be used as a spot treatment on breakouts.
How to use
HOW TO USECleanse Your Face
Wash your face with a gentle cleanser and lightly pat with a towel. Leave skin slightly damp — the clay activates better on moist skin.
Apply a Thin Layer
Using your fingers, apply a thin, even layer over your face, avoiding the immediate eye area. A little goes a long way — no need for a thick coating.
Wait 5–10 Minutes
Allow the mask to dry for approximately 5–10 minutes. You will feel a gentle tightening as the clay draws out impurities and absorbs excess oil.
Gently Remove
Remove the mask using a warm, wet towel in gentle circular motions. Rinse any remaining residue with lukewarm water and gently pat dry.
Follow Up
Apply your toner and moisturizer immediately after to lock in hydration. Your pores are freshly cleaned and will absorb products more effectively.
Who is it for?
WHOPerfect for you if:
- You have oily or combination skin with enlarged pores
- You struggle with blackheads and clogged pores
- You want a deep cleanse without harsh chemicals
- You need a fragrance-free, sensitive-skin-friendly mask
- You want clinically proven pore-minimizing results
- You experience hormonal breakouts or maskne
Consider alternatives if:
- You have very dry or dehydrated skin and need hydrating masks
- You are looking for anti-aging or brightening treatment masks
- You have confirmed fungal acne and need a strictly FA-safe formula
- You prefer leave-on or overnight masks for convenience
- You want a mask with active acids like BHA or AHA included
Skin type compatibility
SKIN TYPESIdeal match. Absorbs excess sebum, mattifies skin, and reduces oil production by up to 46%. Use as a full-face mask 2–3 times per week.
Apply to the T-zone only to target oily areas while leaving dry cheeks untreated. Great for balancing mixed skin zones.
Works well as a weekly detox to keep pores clear. Follow with a hydrating moisturizer to maintain balance.
Fragrance-free and gentle. Kaolin clay is milder than other clays. Multiple reviewers with rosacea report no irritation, unlike harsher clay masks.
Use as a spot treatment on T-zone only, once per week. The clay can over-dry already dehydrated areas. Always follow with a rich moisturizer.
Non-comedogenic clay formula clears out pore congestion. Works well as a spot treatment on breakouts. Effective for managing maskne.
Results timeline
3+ MONTHSInstant Mattification & Smoother Texture
Skin feels immediately cleaner, smoother, and less oily. Pores appear visibly tighter. A slight tightening sensation during use followed by refreshed, detoxified skin.
90% reported skin looked detoxified and mattifiedVisible Pore Reduction & Fewer Blackheads
With consistent use (2–3 times per week), clogged pores are visibly reduced. Blackheads begin to clear, especially around the nose and chin areas. Skin texture becomes noticeably smoother.
44% clinical reduction in clogged pores at 2 weeksRefined Complexion & Oil Control
Long-term oil production is better balanced. Pores consistently appear minimized. Skin looks clearer, more refined, and less prone to hormonal breakouts. Fewer blackheads overall.
46% reduction in surface oil productionMaintained Clear Skin & Prevention
Ongoing use maintains pore clarity and prevents new congestion from building up. Many long-term users report this remains a staple in their routine for years. Works well as a maintenance treatment.
85% of long-term users repurchase this productRatings by platform
13K+ REVIEWSPros & cons
BALANCEDPraised
- Visibly minimizes pores and blackheads after first use
- Fragrance-free and gentle enough for sensitive skin
- Clinically proven results (37–44% pore reduction)
- A little goes a long way — one jar lasts many months
- Non-drying compared to many other clay masks
- Free from parabens, sulfates, silicones, and harsh alcohols
- Fairly Traded Amazonian White Clay sourcing
- Excellent as a spot treatment for hormonal breakouts
Criticized
- Can be drying for very dry skin types if used all over
- Jar packaging is less hygienic than tube or pump
- Thick texture can lead to overuse and wasted product
- Price point higher than drugstore clay mask alternatives
- No active acids (BHA/AHA) included for chemical exfoliation
- White residue can be difficult to fully remove
Budget-friendly alternatives (dupes)
DUPESPure 100% calcium bentonite clay powder — mix with apple cider vinegar or water. More intense oil absorption but significantly more drying. No soothing ingredients like aloe or oatmeal. Requires mixing before use.
Charcoal and clay mask with added salicylic acid for chemical exfoliation. Slightly more aggressive on pores but adds BHA benefits. Not pregnancy-safe due to salicylic acid content. More liquid consistency.
Bentonite clay formula designed for sensitive, oily skin. More gentle overall but less powerful pore-cleansing action. Good pharmacy-accessible option for those who need a mild introduction to clay masks.
K-beauty clay mask with volcanic clusters from Jeju Island. Different clay type but similar pore-purifying effects. Contains BHA for added exfoliation. Not fragrance-free and not pregnancy-safe.
Comparison with competitors
SIDE-BY-SIDEFresh Umbrian Clay Pore Purifying Face Mask
Youth to the People Superclay Purify + Clear Power Mask
Peter Thomas Roth Irish Moor Mud Purifying Black Mask
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Keep lid tightly closed to prevent the clay from drying out.
White plastic jar with grey screw-top lid. Use a clean spatula or freshly washed hands to scoop product.
The 28ml mini size ($20) is TSA-approved and under 100ml. The full 125ml jar exceeds carry-on liquid limits.
Frequently asked questions
FAQYes. This mask contains no retinoids, salicylic acid, hydroquinone, chemical sunscreens, or other ingredients commonly flagged as unsafe during pregnancy. The formula is based on natural clays, glycerin, aloe vera, and oatmeal — all considered safe for use during pregnancy and breastfeeding. As always, consult your healthcare provider if you have specific concerns.
Use with caution. The formula contains Cetearyl Alcohol (a fatty alcohol), Caprylic/Capric Triglyceride (derived from coconut oil), and Lecithin (possibly soy-derived), all of which may feed malassezia yeast in susceptible individuals. If you have confirmed fungal acne, consider patch testing first or opting for a strictly FA-safe clay mask alternative.
Yes, but with spacing. Since this is a wash-off mask used only 2–3 times per week, it generally does not interact negatively with retinol, vitamin C, AHAs, or BHAs. However, avoid using it immediately before or after applying strong actives like prescription retinoids or high-concentration acid peels to prevent irritation. Apply your actives on alternate days or wait at least 30 minutes after masking.
This mask is best suited for oily, combination, and acne-prone skin types. Oily skin will benefit from the full-face application 2–3 times weekly. Combination skin users should focus on the T-zone. Normal and sensitive skin types can use it once a week. Dry skin users should limit use to the T-zone only and always follow with a rich moisturizer.
You will notice smoother, more refined skin immediately after the first use. Clinical studies by Kiehl's show a 37% visible reduction in clogged pores after the first application, increasing to 44% after two weeks of regular use. For sustained oil control and long-term pore minimization, continue using the mask 2–3 times weekly for at least 4–6 weeks.
Apply this mask after cleansing, on damp skin. It replaces your toner step on masking days. After removing the mask, continue with your regular routine: toner, serum, moisturizer, and sunscreen (if daytime). Use 2–3 times per week in the evening for best results. It can also be used as a targeted spot treatment on individual blemishes.
No, this mask has a very low comedogenic rating of 1/5. The dominant ingredients — Kaolin and Bentonite clays — have a comedogenic rating of 0 and actually work to unclog pores. While Cetearyl Alcohol (rating 2) and Tocopherol (rating 2) are present, they are in small concentrations and are rinsed off within 10 minutes, making clogging extremely unlikely.
The product has a PAO (Period After Opening) of 12 months. However, because a little goes a long way, the 125ml jar typically lasts 6–12 months with regular use (2–3 times per week). Unlike some clay masks that dry out quickly in their jar, this formulation maintains its creamy consistency well throughout its shelf life. Keep the lid tightly closed after each use.
Verdict: The Kiehl's Rare Earth Deep Pore Cleansing Masque earns its cult status as one of the most effective and gentle clay masks on the market. With clinically proven pore-minimizing results, a clean formula free from fragrance, parabens, and sulfates, and Fairly Traded Amazonian White Clay at its core, it delivers real results without unnecessary irritation. It is pregnancy-safe, low-comedogenic, and suitable for sensitive skin — a rare combination for a deep-cleansing mask. The only drawbacks are its premium price point compared to drugstore alternatives, the jar packaging (a tube would be more hygienic), and it is not strictly fungal acne safe. For oily, combination, and acne-prone skin types seeking a reliable weekly pore-purifying treatment, this is one of the best options available.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Water
Solvent, Skin Conditioning
|
|
|
| 1 |
Kaolin
Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Skin Protecting, Slip Modifier, Cosmetic Colorant
|
Pores
|
|
| 2 |
Bentonite
Viscosity Controlling, Viscosity Increasing Agent, Emulsion Stabilising, Absorbent, Bulking Agent, Opacifying, Suspending Agent -Nonsurfactant
|
|
|
| 1 |
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
|
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Promotes Wound Healing
Hydrating
|






