Saturn Sulfur Spot Treatment Mask
Saturn Sulfur Spot Treatment Mask
Product Description
Product overview
A fast-acting, medicated 10% sulfur spot treatment mask that clears up existing acne blemishes while preventing new breakouts from forming. Formulated with 4% niacinamide, zinc PCA, bentonite clay, tea tree oil, and manuka oil to absorb excess oil, soothe redness, and purify congested skin for a visibly smoother, clearer complexion.
Maximum-Strength Sulfur
Contains the highest OTC-allowed concentration of sulfur (10%) to dry out blemishes, kill acne-causing bacteria, and dissolve dead skin cells clogging pores.
Texture & feel
SENSORYMaximum-Strength Sulfur
Contains the highest OTC-allowed concentration of sulfur (10%) to dry out blemishes, kill acne-causing bacteria, and dissolve dead skin cells clogging pores.
Radiance-Boosting Niacinamide
4% niacinamide (vitamin B3) reduces surface redness, improves congested skin, and supports a healthier, more luminous complexion.
Oil-Absorbing Bentonite Clay
Volcanic-ash derived clay draws out impurities and excess sebum from pores, leaving skin feeling clean and mattified without over-stripping.
Tea Tree & Manuka Oils
Highly potent tea tree oil (rich in terpinen-4-ol) paired with manuka oil purifies and clarifies congested skin for a smoother appearance.
Safety & compatibility
SAFETopical sulfur is generally considered safe during pregnancy and lactation based on minimal systemic absorption, though no controlled human studies exist. Consult your OB-GYN before use, especially during the first trimester.
Sulfur itself is antifungal and effective against Malassezia. However, the inactive ingredients include polysorbate 60, polysorbate 20, and cetyl ethylhexanoate which may feed Malassezia yeast. Mixed safety for fungal acne.
Rated 1/5. Bentonite clay and zinc PCA actively absorb oil and unclog pores. The formula is designed for acne-prone skin and is unlikely to cause additional breakouts when used as directed.
Free of parabens, sulfates (SLS/SLES), formaldehydes, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, triclosan, and triclocarban. Vegan and cruelty-free.
10% sulfur is a high concentration. May cause dryness, mild burning, or redness, especially on sensitive or broken skin. Patch test recommended. Contains alcohol denat. and tea tree oil which can be irritating.
Do not use with other topical acne medications simultaneously, as this increases the risk of excessive dryness and irritation. Avoid combining with retinoids, benzoyl peroxide, or AHAs/BHAs on the same area at the same time.
Ingredient breakdown
INGREDIENTSSulfur 10%Proven
The star active ingredient. Sulfur is an FDA-approved OTC acne treatment with antibacterial, keratolytic, and sebum-absorbing properties. It has been used medicinally for centuries to treat acne, rosacea, and seborrheic dermatitis.
- Mechanism: Kills Propionibacterium acnes bacteria, dissolves keratin plugs in pores, and dries excess sebum
- Efficacy: Effective against multiple acne types including inflammatory, hormonal, cystic, and rosacea-related breakouts
- Concentration: 10% is the maximum strength allowed in OTC sulfur products per FDA monograph
Niacinamide (Vitamin B3) 4%Proven
A multitasking B vitamin derivative that addresses redness, uneven skin tone, enlarged pores, and excess oil production. Works synergistically with sulfur to boost overall skin clarity.
- Research: Studies show 4% niacinamide significantly reduces sebum production and improves skin barrier function
- Benefits: Reduces post-inflammatory redness, minimizes pore appearance, and supports a healthier skin barrier
- Tolerance: Well-tolerated by most skin types at this concentration, including sensitive skin
Zinc PCA 1%Proven
A zinc salt of pyrrolidone carboxylic acid that combines the antibacterial benefits of zinc with the hydrating properties of PCA (a natural moisturizing factor component).
- Oil Control: Helps regulate sebum production for a clearer, more matte complexion
- Dual Action: Absorbs excess oil while simultaneously providing light hydration, preventing the over-drying common with sulfur treatments
Bentonite KeyProven
A volcanic ash-derived clay with exceptional oil-absorbing properties. Its negative ionic charge attracts and draws out positively-charged bacteria, toxins, and impurities from pores.
- Absorption: Can absorb up to several times its weight in sebum and impurities
- Pore Cleansing: Physically pulls dirt, oil, and debris from deep within pores for a thorough cleanse
Tea Tree & Manuka Oils KeyProven
Tea tree oil (Melaleuca alternifolia) standardized for high levels of terpinen-4-ol, the primary antimicrobial compound. Paired with New Zealand manuka oil for enhanced antibacterial potency.
- Research: Tea tree oil at 5% concentration has been shown to be as effective as 5% benzoyl peroxide for mild-moderate acne with fewer side effects
- Manuka Synergy: Manuka oil provides complementary antimicrobial activity, enhancing overall antibacterial efficacy
Dipotassium Glycyrrhizate SupportingPromising
A licorice root derivative with anti-inflammatory and soothing properties. Helps counterbalance the potential irritation from sulfur and tea tree oil, reducing the appearance of acne-related redness.
- Function: Calms inflammation and soothes irritated skin to reduce visible redness
- Complementary: Works with allantoin to offset the drying effects of the active ingredients
34 ingredients
Active Ingredient: Sulfur 10%. Inactive Ingredients: Water/Eau/Aqua, Cetyl Ethylhexanoate, Isoamyl Laurate, Niacinamide, Gum Arabic, Bentonite, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Polyglyceryl-2 Caprate, Olive Oil Glycereth-8 Esters, Zinc PCA, Allantoin, Dipotassium Glycyrrhizate, Melaleuca Alternifolia (Tea Tree) Leaf Oil, Leptospermum Scoparium (Manuka) Branch/Leaf Oil, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Melia Azadirachta Leaf Extract, Amber Powder, Melia Azadirachta Flower Extract, Coccinia Indica Fruit Extract, Solanum Melongena (Eggplant) Leaf Extract, Ocimum Basilicum (Basil) Flower/Leaf Extract, Quartz, Polysorbate 60, Sorbitan Isostearate, Tocopherol, Disodium EDTA, Phenoxyethanol, Polysorbate 20, Alcohol Denat., Chlorphenesin, PEG-40 Hydrogenated Castor Oil, Caprylyl Glycol.
Where it fits in your routine
ROUTINEApply to clean skin as a spot treatment. Leave on for 20–30 minutes, then rinse off with warm water. Follow with a hydrating serum or moisturizer to offset any dryness. Use PM only, several times per week as needed.
How to use
HOW TO USECleanse Your Skin
Wash face with a gentle cleanser and pat dry. Ensure skin is clean and free of makeup, sunscreen, or other products before application.
Apply to Blemished Areas
Squeeze a small amount of the green paste and dab directly onto active blemishes, blackheads, or congested areas. Avoid surrounding skin to prevent unnecessary dryness.
Let It Dry (20–30 Minutes)
Allow the mask to dry completely on the skin. You will feel a tightening sensation as the bentonite clay and sulfur work to draw out impurities. The mask will turn lighter in color as it dries.
Rinse Off with Warm Water
Gently remove the dried mask with warm water. Pat skin dry. Follow with a hydrating moisturizer if needed — the brand recommends Sunday Riley U.F.O. Face Oil or Tidal Water Cream.
Who is it for?
WHOPerfect for you if:
- You struggle with inflammatory, hormonal, or cystic acne
- You have oily or combination skin prone to breakouts
- You want a targeted spot treatment rather than a full-face product
- You need a non-prescription alternative to stronger acne medications
- You deal with congested pores, blackheads, or acne rosacea
- You prefer a clean, vegan, and cruelty-free formula
Consider alternatives if:
- You have very dry or dehydrated skin (sulfur can be very drying)
- You are sensitive to sulfur or tea tree oil
- You want a large-volume product for full-face use (0.5 oz is small)
- You are on a tight budget (higher price per ounce vs drugstore options)
- You need a strictly fungal-acne-safe formula (contains some FA triggers)
- You are bothered by strong product odors
Skin type compatibility
SKIN TYPESIdeal match. Sulfur, bentonite, and zinc PCA all target excess oil production. Absorbs shine and unclogs pores without needing additional mattifying products.
Works perfectly as a spot treatment on oily, congested zones (T-zone, chin) without affecting drier areas. Use only where needed for best results.
Specifically formulated for acne. Addresses inflammatory, hormonal, cystic, and rosacea-related breakouts. Low comedogenic rating of 1/5.
Effective for occasional breakouts. Use as a targeted spot treatment when blemishes appear. Follow with moisturizer to maintain skin balance.
Can be very drying. Limit to spot application only, never full-face. Always follow with a rich moisturizer. Some users with dry skin report irritation or flaking.
Contains 10% sulfur, tea tree oil, and alcohol denat. — all potential irritants. Patch test is essential. Start with shorter application times (10 min). Some sensitive users report redness or burning.
Results timeline
4–6 WEEKSImmediate Mattifying & Drying Effect
Active blemishes begin to dry out. Skin feels tighter and oil is visibly absorbed where mask was applied. Some pimples may come to a head overnight when used before bed.
70% noticed overnight improvementVisible Blemish Reduction
Existing pimples shrink noticeably in size and redness. Inflammatory lesions begin to flatten. Many users report pimples disappearing within 1–2 days of consistent spot treatment use.
65% saw pimple size reductionClearer, Smoother Complexion
Consistent use leads to fewer new breakouts. Congestion clears as bentonite and sulfur draw out impurities. Niacinamide begins improving overall skin tone and reducing post-acne redness.
60% experienced fewer new breakoutsSignificant Acne Improvement
With regular use several times per week, overall acne severity decreases. Pores appear smaller, oil production is better regulated, and skin looks healthier and more radiant thanks to niacinamide.
55% reported significantly clearer skinRatings by platform
2K+ REVIEWSPros & cons
BALANCEDPraised
- Rapidly dries out pimples — many users see overnight results
- Maximum-strength 10% sulfur is highly effective on inflammatory and cystic acne
- Multi-active formula with niacinamide, zinc, tea tree, and bentonite
- Works on multiple acne types including hormonal and rosacea-related
- Clean, vegan, cruelty-free formula — Clean at Sephora certified
- A little goes a long way as a spot treatment
- Can double as an overnight spot treatment or short-contact mask
Criticized
- Strong sulfur/herbal smell that some describe as unpleasant
- Very small tube (0.5 oz) for the price — poor value per ounce
- Can be extremely drying, especially for dry or sensitive skin
- Tea tree oil may cause burning or contact dermatitis in some users
- Tube sometimes contains a lot of air, less product than expected
- The green tint can stain pillowcases if used overnight
- Brand had controversy over fake Sephora reviews at product launch
Budget-friendly alternatives (dupes)
DUPESSame 10% sulfur concentration in a simple, no-frills formula (only 2 ingredients: sulfur + polyethylene glycol). Lacks niacinamide, zinc PCA, and botanical extracts but delivers comparable acne-drying results at a fraction of the cost. Cult favorite on TikTok.
Also features 10% sulfur with niacinamide and glycolic acid for added exfoliation. Larger size for the price. Newer product with less long-term user data but similar active formulation approach.
Contains 10% sulfur plus niacinamide and glycolic acid. French pharmacy formulation designed for sensitive skin. Suitable for those who want a similar active profile from a dermatologically-tested brand.
Comparison with competitors
SIDE-BY-SIDESunday Riley Saturn
De La Cruz Sulfur Ointment
Kate Somerville EradiKate 10% Sulfur + BHA
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight and heat. Keep tube tightly closed when not in use. Do not store in humid bathrooms for extended periods.
Squeezable aluminum tube with screw cap. Green paste formula visible through tube opening.
Yes — 15ml / 0.5 fl oz is well under the 100ml TSA carry-on limit. Note: classified as ORM-D due to sulfur content, may have shipping restrictions (ground only in some cases).
Frequently asked questions
FAQTopical sulfur is generally considered safe during pregnancy and breastfeeding due to minimal systemic absorption. Medical literature notes that no fetal anomalies have been reported with topical sulfur use, and it is commonly recommended by dermatologists as a pregnancy-safe acne treatment. However, no controlled human studies have been conducted specifically on this product. Always consult your OB-GYN or dermatologist before starting any new skincare product during pregnancy or breastfeeding. Do not apply to the chest/nipple area while nursing.
This is a mixed answer. Sulfur itself has strong antifungal properties and is effective against Malassezia yeast — many users on Amazon and Reddit report success using Saturn for fungal acne. However, the inactive ingredient list includes polysorbate 60, polysorbate 20, cetyl ethylhexanoate, and isoamyl laurate, which are known Malassezia triggers. The antifungal action of sulfur may offset these triggers for many users, but results can vary. If you have confirmed fungal acne, a simpler sulfur product like De La Cruz (only 2 ingredients) may be a safer choice.
Do not apply Saturn Mask at the same time as other active treatments like retinol, vitamin C serums, AHAs (glycolic, lactic acid), or BHAs (salicylic acid) on the same area. This can cause excessive dryness, irritation, and chemical burns. You can use these products in your routine on alternating nights or at different times of day — for example, Saturn in the PM and vitamin C in the AM. The niacinamide in Saturn is compatible with most actives. Wait at least 30 minutes after rinsing off Saturn before applying other actives if used on the same evening.
Saturn works best for oily, combination, and acne-prone skin types. It is specifically formulated to address multiple forms of acne including inflammatory, hormonal, cystic, blackhead-type, and acne rosacea. Normal skin types can also use it effectively as an occasional spot treatment. Those with dry or very sensitive skin should exercise caution — the 10% sulfur concentration can be quite drying, and tea tree oil may cause irritation. Always use as a spot treatment rather than full-face if you have dry or sensitive skin.
Many users report seeing overnight improvements — pimples shrink and dry out after a single use, especially when applied before bed and left on for 20–30 minutes. For ongoing acne management, most users see meaningful improvement within 1–2 weeks of regular use (several times per week). Full benefits including fewer breakouts, smoother texture, and improved skin clarity typically develop over 4–6 weeks of consistent use.
Saturn is a rinse-off treatment mask, so it sits in a unique place in your routine. Apply after cleansing (and optionally toning) on bare, dry skin. Leave on for 20–30 minutes, then rinse off. After rinsing, continue with the rest of your routine: serum, moisturizer, and SPF (if daytime, though PM use is recommended). Do not layer other actives underneath the mask. The brand suggests following with Sunday Riley U.F.O. Face Oil or a hydrating moisturizer.
Saturn has a low comedogenic rating of 1 out of 5. The formula is specifically designed for acne-prone skin and contains ingredients like bentonite clay, sulfur, and zinc PCA that actively work to unclog pores and absorb excess oil. While some inactive ingredients (like cetyl ethylhexanoate and olive oil esters) have mild comedogenic potential, the overall formula is rinse-off and unlikely to cause pore clogging when used as directed. It is not intended to be left on overnight for extended periods.
Saturn has a Period After Opening (PAO) of 12 months. The 0.5 oz tube typically lasts 1–3 months depending on frequency of use and how many blemishes you treat per session. Since it is a spot treatment and only a small amount is needed per application, many users find the tube lasts longer than expected despite its small size. Always check the expiration date on the packaging — some retailers have been reported selling expired stock.
Verdict: Sunday Riley Saturn is a potent, well-formulated sulfur spot treatment that delivers fast visible results on active breakouts. The combination of maximum-strength 10% sulfur with 4% niacinamide, zinc PCA, bentonite clay, and antimicrobial botanicals creates a multi-pronged attack against acne that many users find genuinely effective — often overnight. However, the premium price tag for a very small 0.5 oz tube is the biggest drawback, especially when budget alternatives like De La Cruz offer the same sulfur concentration for a fraction of the cost. The strong smell, potential for irritation, and small size keep this from a perfect score, but for those willing to invest in a cleaner, more elegant formula with proven supporting ingredients, Saturn remains a cult-favorite spot treatment worth trying.
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 |
Sulfur
Skin Conditioning, Antistatic Agent, Hair Conditioning, Antidandruff Agent, Antiacne Agent, Skin-Conditioning Agent -Miscellaneous, Antiseborrhoeic
|
|
|
| 1 |
Isoamyl Laurate
Skin Conditioning, Emollient, Fragrance
|
|
|
| 1 |
Cetyl Ethylhexanoate
Skin Conditioning, Emolient
|
|
|
| 1 |
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
|
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
|


