iUNIK Beta-Glucan Barrier Sunscreen SPF 50+ PA++++ · 60ml

iUNIK Beta-Glucan Barrier Sunscreen
SPF 50+ PA++++ · 60ml

Sun protection that works as hard on your barrier as it does on UV defence. The iUNIK Beta-Glucan Barrier Sunscreen is a broad-spectrum chemical SPF that brings something genuinely different to the sunscreen category — a formula built not just to block UV rays, but to actively hydrate, soothe, firm, and strengthen the skin while it does so. The result is a daily SPF that feels and functions more like a high-performance skincare step than a standalone sun product, with a serum-like texture that disappears into the skin completely, leaving a soft matte finish and zero white cast on every skin tone.

The UV protection system is a 5-layer sun filter delivering comprehensive broad-spectrum SPF 50+ PA++++ coverage. The filter lineup is precisely chosen for both efficacy and photostability: Ethylhexyl Triazone provides potent, highly photostable UVB protection at low concentrations; Diethylamino Hydroxybenzoyl Hexyl Benzoate (Uvinul A Plus) offers robust UVA coverage with an outstanding safety and stability profile; Drometrizole Trisiloxane (Mexoryl XL) is a hybrid UVA/UVB filter known for its excellent photostability and skin feel; Terephthalylidene Dicamphor Sulfonic Acid (Mexoryl SX) adds water-soluble UVA protection; and Diethylhexyl Butamido Triazone is one of the most photostable UVB filters available, retaining 90% of its efficacy after 25 hours of UV exposure. Together, this five-filter system creates layered, complementary, photostable coverage that holds throughout the day without degrading — the foundation of genuinely reliable daily sun protection. 

The formula is structured as a triple-layer oil-in-gel-in-water system, a sophisticated emulsion architecture that gives the product its distinctive serum-like lightness while ensuring the UV filters are evenly suspended and delivered across the skin surface. Butyloctyl Salicylate acts as a cosmetic elegance enhancer — helping dissolve the oil-soluble filters, reducing greasiness, improving spreadability, and contributing to a clean, comfortable finish. Diisopropyl Sebacate further supports the formula's elegant skin feel, absorbing rapidly while reducing the heaviness that can make chemical sunscreens feel unpleasant. InciDecoder

Beta-Glucan — the active the product is named for — is a powerfully hydrating polysaccharide that holds up to 20% more moisture than hyaluronic acid. Derived from yeast, oat, or mushroom cell walls, Beta-Glucan works by forming a breathable, protective film on the skin surface that locks in moisture, reduces transepidermal water loss, and creates a calming, antioxidant-rich microenvironment — making it particularly valuable in a sunscreen, where it actively counteracts the dehydrating effect that UV exposure can have on the skin. Studies have shown Beta-Glucan can penetrate deeply enough to stimulate fibroblast activity, supporting collagen production and contributing to the formula's broader anti-aging function. Glow & Skin Care

GreenDiol® — a next-generation moisturising active — works alongside Beta-Glucan to deliver long-lasting hydration and further reinforce the skin's natural moisture barrier. The Aging-Shield Peptide™ complex — comprising Argireline Amplified® Peptide (an enhanced version of the well-known expression-line-targeting Acetyl Hexapeptide-8), Goldrella Peptide, and Panax Ginseng Extract — works to improve elasticity and deliver a visible firming and slow-aging effect with continued use. Chlorella Ferment and Lactobacillus Ferment add probiotic-derived skin-balancing and barrier-supporting properties. Panthenol soothes and supports barrier repair. Allantoin calms, protects, and promotes cell renewal. Lecithin enhances skin compatibility and absorption. Caprylic/Capric Triglyceride provides lightweight, non-comedogenic nourishment. InciDecoderK Beauty World

The overall formula is fragrance-free, vegan, and free from common allergens — a clean, thoughtful formulation that suits sensitive skin without compromise.

SPF: 50+ PA++++ · Broad Spectrum
Skin types: All skin types — including dry, sensitive, and aging skin
Free from: Fragrance, parabens, sulfates, common allergens, oxybenzone
Vegan · Cruelty-free · Made in Korea
Size: 60ml (also available in 15ml mini)

How to use: As the final step of your morning skincare routine, apply a generous, even amount to the face and any exposed areas 15–30 minutes before sun exposure. Apply before makeup — the matte finish acts as a smooth base that improves makeup adherence and longevity. Reapply every two hours during outdoor sun exposure. Remove thoroughly at the end of the day with an oil cleanser followed by a water-based cleanser.

Key ingredients: 5-Layer UV Filter System (Ethylhexyl Triazone · Diethylamino Hydroxybenzoyl Hexyl Benzoate · Drometrizole Trisiloxane · Terephthalylidene Dicamphor Sulfonic Acid · Diethylhexyl Butamido Triazone) · Beta-Glucan · GreenDiol® · Aging-Shield Peptide™ (Argireline Amplified® · Goldrella Peptide · Panax Ginseng Extract) · Chlorella Ferment · Lactobacillus Ferment · Panthenol · Allantoin · Lecithin

✦ Why Seoulma Skincare Recommends This

There are plenty of decent K-beauty SPFs, but iUNIK has built something notably considered here. The five-filter system prioritises photostability above all else — a detail that matters because a sunscreen that degrades after two hours of UV exposure is not actually providing SPF 50 protection by midday. The Beta-Glucan addition is genuinely meaningful rather than cosmetic: at a concentration that outperforms hyaluronic acid for moisture retention, it turns this into a product that actively builds barrier health with every use, rather than just sitting on top of it. And the Aging-Shield Peptide™ complex — Argireline Amplified in particular — is the kind of addition you'd expect to find in a dedicated serum, not a sunscreen. For customers who want their morning SPF to carry more of the routine's weight, or for anyone with dry, dehydrated, or aging concerns who wants their sun protection to work overtime, this is an easy recommendation.