Hydromer
Hydromer
Product Description
Product overview
A thermoreversible algae shield composed of over 60% Jeju Ecklonia Cava polymers that forms a breathable, antioxidant-rich film over skin — locking in hydration, shielding against environmental irritants, and priming for an all-day luminous, dewy finish with or without makeup. Silicone-free, 100% skincare.
Breathable Algae Shield
Over 60% Jeju Ecklonia Cava polymers form a protective barrier that locks hydration in and blocks dust, smog, micro-pollutants, and free radicals from direct skin contact.
Texture & feel
SENSORYBreathable Algae Shield
Over 60% Jeju Ecklonia Cava polymers form a protective barrier that locks hydration in and blocks dust, smog, micro-pollutants, and free radicals from direct skin contact.
Thermoreversible Technology
Melts down with skin warmth, filling and settling into fine lines and texture for a smooth, skin-like canvas — without silicones.
Sunscreen & Makeup Grip
Film-forming agents create a slightly tacky layer that grips sunscreen and makeup, reducing oxidation and extending wear time all day.
Dual Fungi Hydration
Hydrolyzed Sclerotium Gum and Chondrus Crispus (Irish Moss) trap moisture and plump pores throughout the day without clogging them.
Blemish-Filtering Effect
Increases light absorption and refraction from the skin surface, reducing the visible saturation of red, purple, and dull blemish tones — like a real-life skin filter.
Anti-Inflammatory Soothing
Dipotassium Glycyrrhizate (licorice root), Allantoin, Panthenol, and Beta-Glucan work together to calm irritation, support healing, and strengthen the skin barrier.
Safety & compatibility
SAFEContains Rosmarinus Officinalis (Rosemary) Leaf Oil, an essential oil some experts advise avoiding during pregnancy. Concentration is very low (near end of INCI), but consult your OB-GYN before use.
Rated fungal acne safe by SkinSort. Free from fatty acids, esters, and fermented ingredients. Contains polysorbates but at concentrations generally considered safe for malassezia-prone skin.
Rating 1/5. Oil-free, silicone-free, water-based formula. No heavy occlusives or pore-clogging oils. Suitable for acne-prone skin.
Free from drying alcohols (denat., ethanol, isopropyl). 1,2-Hexanediol is a gentle preservative booster, not a drying alcohol.
Does not contain any of the 26 EU-regulated fragrance allergens. Suitable for highly sensitive and reactive skin types.
PEG-150 Distearate and Polysorbates 20/80 are emulsifiers that help blend ingredients. Generally well-tolerated, but those with severely compromised barriers may want to patch test first.
Ingredient breakdown
INGREDIENTSEcklonia Cava Extract (Fucoidan) ~60%Proven
A brown seaweed (kelp) harvested from Jeju Island, South Korea. Rich in phlorotannins — powerful marine polyphenols with antioxidant activity 10–100x stronger than many land-based antioxidants. Forms the base of Hydromer's protective film.
- Antioxidant: Phlorotannins from Ecklonia Cava inhibit MMP-1 expression, protecting collagen from UV-induced degradation (Kim et al., Life Sciences, 2006).
- Anti-Inflammatory: Ethanolic extracts inhibit COX-2 and iNOS via MAP kinase and NF-κB pathways (Jung et al., Food Chem Toxicol, 2009).
- Film-Forming: Fucoidan-rich polymers create a thermoreversible, breathable barrier that shields skin from environmental stressors.
Hydrolyzed Sclerotium GumPromising
A polysaccharide derived from the Sclerotium rolfsii fungus. Acts as a natural film-former and moisture binder, creating a smooth, hydrated surface without the heaviness of silicones.
- Moisture Retention: Forms a breathable hydrogel layer that traps water on the skin surface, keeping skin plump throughout the day.
- Texture Smoothing: Fills micro-texture and fine lines, contributing to the product's primer-like smoothing effect.
Dipotassium GlycyrrhizateProven
A salt derived from licorice root (Glycyrrhiza glabra). A well-documented soothing and brightening agent that calms inflammation and helps fade post-inflammatory marks.
- Anti-Inflammatory: Inhibits cyclooxygenase and lipoxygenase pathways, reducing redness and irritation effectively.
- Brightening: Inhibits tyrosinase activity, helping to reduce dark spots and even out skin tone over time.
Panthenol (Pro-Vitamin B5) ~0.5%Proven
Converts to Vitamin B5 in the skin. A multi-functional humectant that attracts moisture, strengthens the skin barrier, and promotes wound healing by stimulating fibroblast proliferation.
- Barrier Repair: Promotes lipid synthesis in the stratum corneum, reinforcing the skin's natural moisture barrier (Proksch & Nissen, 2002).
- Anti-Irritation: Reduces irritation caused by other ingredients like fragrance and chemical sunscreens (Stettler et al., 2017).
Beta-GlucanProven
A polysaccharide found in fungi, oats, and yeast. Known for its ability to penetrate the skin to stimulate collagen synthesis and provide deep, long-lasting hydration with anti-aging benefits.
- Hydration: Comparable moisture-binding capacity to hyaluronic acid, with added skin-soothing properties.
- Immune Support: Stimulates macrophage activity, helping skin heal from micro-damage and inflammation.
AllantoinProven
A gentle, non-irritating compound found naturally in comfrey root. Promotes cell regeneration, soothes irritation, and helps heal micro-wounds, making it ideal for sensitive and acne-prone skin.
- Healing: Accelerates keratinocyte migration and proliferation, supporting faster skin recovery.
- Soothing: Recognized by the FDA as an effective skin protectant at concentrations of 0.5–2%.
Chondrus Crispus Extract (Irish Moss)Promising
A red seaweed rich in carrageenan, a natural polysaccharide that forms a moisture-locking film on skin. Works as an emollient to soften and smooth the skin surface while reducing transepidermal water loss.
- Occlusive: Creates a protective moisture barrier that prevents water evaporation from the skin throughout the day.
- Mineral-Rich: Contains vitamins A, E, and K plus minerals including sulfur, iodine, and calcium to nourish skin.
17 ingredients
Ecklonia Cava Extract (Fucoidan), Water, Butylene Glycol, Polysorbate 80, PEG-150 Distearate, 1,2-Hexanediol, Polysorbate 20, Propanediol, Glycerin, Hydrolyzed Sclerotium Gum, Chondrus Crispus Extract, Panthenol, Beta-Glucan, Allantoin, Dipotassium Glycyrrhizate, Rosmarinus Officinalis Leaf Oil, Ethylhexylglycerin
Where it fits in your routine
ROUTINEApply Hydromer as the final skincare step before sunscreen or makeup. It acts as a shield and primer — locking in everything underneath while gripping everything applied on top.
How to use
HOW TO USEDispense 1–2 Drops
After completing your full skincare routine (cleanser, toner, serum, moisturizer), dispense 1–2 drops of Hydromer onto your fingertips.
Apply a Thin, Even Layer
Distribute a thin, even layer across your entire face. The thermoreversible formula will melt into your skin's warmth, settling into fine lines and texture.
Wait 15–30 Seconds
Allow the film to fully set. You'll feel a slight tacky grip — this is the protective shield forming and is what holds sunscreen and makeup in place.
Apply Sunscreen or Makeup
Gently dab (don't rub) your sunscreen or base makeup onto skin. The gripping layer ensures long-lasting wear with reduced oxidation throughout the day.
Who is it for?
WHOPerfect for you if:
- You want a silicone-free primer that is 100% skincare
- Your skin gets congested or breaks out from sunscreen and makeup
- You live in a polluted city and want environmental protection
- You love the Korean glass skin / dewy finish look
- You want longer-lasting makeup without silicone-based primers
- You have sensitive skin that reacts to traditional primers
- You want to reduce visible redness and blemish appearance instantly
Consider alternatives if:
- You prefer a completely matte finish
- You want a thick, pore-filling putty-style primer
- You need high SPF (Hydromer is not a sunscreen)
- You dislike any tacky or gripping sensation on skin
- You're looking for active anti-aging ingredients like retinol or peptides
- Budget is a concern — $39 for 30ml is a premium price per ml
Skin type compatibility
SKIN TYPESOil-free, silicone-free formula helps regulate sebum-air contact and reduces oxidation that causes blackheads. Lightweight with no greasy residue.
Locks in moisture from prior skincare steps effectively. For very dry skin, pair with a rich moisturizer underneath for best results.
Balances oil-hydration levels across different face zones. Regulates dryness or oiliness over time while providing an even canvas.
EU allergen-free, fragrance-free, and loaded with soothing agents (allantoin, panthenol, licorice root). Shields sensitive skin from contact with potentially irritating sunscreens and makeup.
Comedogenic rating 1/5. Shields skin from pollution-triggered breakouts. Reduces sebum oxidation (the chemical reaction that forms blackheads). Fungal acne safe.
Results timeline
MONTH 2–3Instant Dewy Glow & Smoother Skin
Hydromer fills fine lines and texture on contact, creating a luminous, light-reflecting canvas. Visible reduction in blemish redness and pore appearance within seconds of application.
90% noticed instantlyImproved Hydration & Fewer Irritation Flare-Ups
With daily use, the protective barrier reduces contact between skin and environmental irritants. Many users report fewer random breakouts and less redness from their sunscreen or makeup.
75% noticed improvementBalanced Oil Production & Healing Support
Skin begins to regulate its own oil-hydration balance as the anti-inflammatory and barrier-supporting ingredients take cumulative effect. Blemish healing time may decrease noticeably.
65% noticed improvementCalmer, Clearer, More Resilient Skin
Long-term antioxidant protection and reduced environmental stress contribute to less congestion, more even tone, and overall improved skin resilience. Best results with consistent daily use.
60% noticed improvementRatings by platform
29+ REVIEWSPros & cons
BALANCEDPraised
- Instant glass skin / dewy glow effect praised by beauty influencers
- 100% skincare formula — no silicones, no makeup ingredients
- Minimalist 17-ingredient formula — low risk of irritation
- Extends sunscreen and makeup wear all day
- Shields sensitive skin from potentially irritating sunscreens
- Reduces breakouts caused by environmental pollution
- Vegan, cruelty-free, reef-safe, and fungal acne safe
- Unique thermoreversible algae technology — nothing else quite like it
Criticized
- Expensive for the size — $39 USD for only 30ml
- Frequent stock issues and long shipping times (ships from Korea/Canada)
- Not widely available at major retailers like Sephora or Ulta
- Some key active concentrations may be lower than ideal
- Dewy finish isn't for everyone — matte-skin lovers may find it too glowy
- Contains rosemary essential oil — not ideal for pregnancy
- Slight tacky feel before products are applied on top
Budget-friendly alternatives (dupes)
DUPESOffers a similar dewy, film-forming hydration layer but uses snail mucin instead of algae polymers. No priming grip effect. Much larger size (100ml) at a fraction of the price. Lacks the environmental shield technology.
Delivers a similar gel-grip texture that holds makeup in place. Uses hyaluronic acid for hydration. However, it contains silicones and lacks the algae-based protective barrier and skincare-first approach.
Also uses Ecklonia Cava extract from Jeju as a key ingredient with similar marine antioxidant benefits. A richer cream formula designed as a moisturizer — lacks the primer grip and film-forming shield technology.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Room temperature is fine — no need to refrigerate.
Frosted glass dropper bottle with pipette — protects formula integrity and allows precise 1–2 drop dispensing.
Yes — 30ml is well under the 100ml carry-on limit. Compact glass bottle fits easily in a travel pouch.
Frequently asked questions
FAQHydromer does not contain retinoids, salicylic acid, hydroquinone, or chemical sunscreen filters. However, it does contain Rosmarinus Officinalis (Rosemary) Leaf Oil, an essential oil that some healthcare providers advise avoiding during pregnancy and breastfeeding due to potential stimulatory effects. The concentration is very low (listed near the end of the INCI), but we recommend consulting your OB-GYN or dermatologist before use during pregnancy or while nursing.
Yes. Hydromer is rated fungal acne safe by SkinSort. The formula is free from fatty acids, fatty acid esters, and fermented ingredients that typically feed malassezia yeast. It does contain Polysorbate 80 and 20 (emulsifiers), which some strict FA guides flag, but at the concentrations used in this formula they are generally considered safe. The product is also oil-free and silicone-free, making it an excellent choice for FA-prone skin.
Yes. Hydromer is a protective shield with no actives that would conflict with retinol, vitamin C, AHAs, or BHAs. In fact, using Hydromer on top of these actives can help seal them in and protect sensitized skin from environmental irritants throughout the day. The brand specifically notes that if you use Slurp's Decalt (BHA/PHA) and Niacid in your routine, you should alternate their use to avoid pH conflicts — but Hydromer itself is compatible with all of them.
Hydromer is suitable for all skin types. It is especially beneficial for oily, combination, sensitive, and acne-prone skin because of its oil-free, silicone-free, non-comedogenic formula. It balances oil-hydration levels over time. For dry skin, it works beautifully when layered over a rich moisturizer. Those with sensitive skin who react to sunscreens or makeup will particularly benefit from the protective barrier layer.
Cosmetic results are immediate — you'll notice a luminous, dewy glow and smoother-looking skin right after application. For skincare benefits like reduced breakouts from environmental irritants, improved hydration balance, and calmer skin, most users report noticeable changes within 2–4 weeks of consistent daily use. Full skin-balancing and barrier-strengthening effects develop over 2–3 months.
Hydromer is applied as your final skincare step, after all serums and moisturizers, but before sunscreen and makeup. It acts as a bridge between skincare and sun protection/makeup — locking in your skincare while gripping everything applied on top. Apply 1–2 drops in a thin, even layer across the face, wait 15–30 seconds for the film to set, then apply sunscreen or makeup by gently dabbing (not rubbing).
Hydromer has a comedogenic rating of 1 out of 5, meaning it has a very low risk of clogging pores. The formula is oil-free, silicone-free, and water-based. Instead of filling pores with silicones, the algae polymers plump pores with hydration from the outside. Many acne-prone users report that Hydromer actually reduces breakouts by preventing pollution and irritants from making direct contact with skin.
Hydromer has a Period After Opening (PAO) of 12 months. Store it in a cool, dry place away from direct sunlight. The glass dropper bottle helps maintain formula integrity. With the recommended usage of 1–2 drops per application, the 30ml bottle typically lasts 2–3 months with daily use.
Verdict: Slurp Hydromer is a genuinely innovative product in the skincare-primer hybrid space. The 60% Jeju Ecklonia Cava algae base creates a unique protective, hydrating, and priming shield that nothing else on the market replicates. It excels for sensitive, acne-prone, and oily skin types who want glass skin without silicones. The minimalist 17-ingredient formula keeps irritation risk low, and the science behind marine polyphenol antioxidants is solid. The main drawbacks are the premium price for a small 30ml bottle ($1.30/ml), limited retail availability, and occasional shipping delays. If you can afford it and get your hands on it, Hydromer delivers a distinctive combination of real skincare benefits and cosmetic elegance that stands apart from conventional primers.
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 |
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
|
Hydrating
|
|
| 0 |
Polysorbate 80
Emulsifying
|
|
|
| 0 |
PEG-150 Distearate
Emulsifying
|
|
|
| 1 |
1,2-Hexanediol
Solvent, Skin Conditioning
|
Hydrating
|








