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Hello, this is SUNJIN Beauty Science
Have you ever tried adding more than 2% BEMT to the oil phase of an OW formulation?
You’ll notice the difference the moment you add it. The formula becomes shiny and sticky, and its spreadability suffers.
This highlights a common challenge“To achieve higher SPF, we need to add more UV filters, but the formulation becomes increasingly heavy.”
Today, sun care products are no longer evaluated solely on their SPF and PA ratings. The sensory experience matters just as much—formulations should feel as lightweight as a serum and as comfortable as a lotion.
Rather than simply adding more organic UV filters, SUNJIN Beauty Science introduces SUNSIL UV Capsule Technology, which allows UV filters to be incorporated into the water phase.

<Challenge> Why Is It Difficult to Achieve Both High SPF and a Lightweight Feel?

Achieving high SPF requires incorporating a sufficient amount of various UV filters.
However, dissolving and dispersing UV filters effectively while maintaining a lightweight sensory profile presents an additional formulation challenge.
BEMT is a prime example. Its solubility varies significantly depending on the type of oil used. Therefore, when incorporating BEMT at high concentrations, careful selection of solvents and oil combinations is essential for successful formulation design. For instance, BEMT exhibits high solubility in oils such as C12-15 Alkyl Benzoate, while its solubility is very low in certain silicone oils.
Ultimately, achieving high SPF requires more than simply increasing UV filter concentrations. Solubility, formulation stability, and sensory performance must all be considered together.

<Solution> Encapsulate Organic UV Filters in Silica for Water-Phase Dispersion

1. Disperse Organic UV Filters in the Water Phase

SUNJIN Beauty Science has developed SUNSIL UV Capsule Technology, which encapsulates the organic UV filter BEMT within porous silica.
Traditionally, organic UV filters are dissolved in the oil phase before being incorporated into a formulation. With this technology, BEMT is encapsulated in silica, enabling it to be dispersed in the water phase.
In particular, SUNSIL UV Capsule offers excellent dispersibility in water, making it suitable for O/W sun care formulations.
Organic UV Filter (BEMT) → Silica Loading & Encapsulation → Water-Phase Dispersion → O/W Sun Care Application
Rather than simply adding more organic UV filters, SUNSIL UV Capsule offers a new approach: encapsulating them in silica for dispersion in the water phase.
This is the core innovation behind SUNSIL UV Capsule.

02. Encapsulating Organic UV Filters in Silica Can Also Help Reduce Skin Penetration

The benefits of SUNSIL UV Capsule go beyond simply enabling dispersion in the water phase.By encapsulating organic UV filters within a porous silica structure, this technology can help limit UV filter leakage and reduce skin penetration.
In studies, BEMT encapsulated in silica demonstrated reduced skin penetration of BEMT.
The same research also showed reduced UV filter leakage and improved photostability.
In other words, encapsulating organic UV filters in silica enables water-phase dispersion while also addressing skin penetration.
SUNSIL UV Capsule is more than just a UV filter ingredient—it is atechnology designed to enable more effective incorporation of organic UV filters into sun care formulations

<Technology>

03. Beyond a Single UV Filter: A Diverse UV Capsule Portfolio

SUNSIL UV Capsule Technology is not limited to a single UV filter.
SUNJIN Beauty Science is expanding its UV Capsule Portfolio by incorporating a variety of organic UV filters into its silica-based capsule technology.
This allows formulators to select the appropriate UV Capsule based on the desired UV spectrum coverage and formulation objectives.
More than a single BEMT capsule, SUNSIL UV Capsule is a platform designed to extend silica encapsulation technology to a diverse range of UV filters.
This is the future of UV Capsule Technology that SUNJIN Beauty Science is building.

04. SUNSIL UV Capsule: Patented Technology Supported by International Scientific Research

SUNSIL UV Capsule Technology is a patented technology developed by SUNJIN Beauty Science using porous silica.
The research findings supporting this technology were published in the international scientific journal Microporous and Mesoporous Materials, Volume 397 (2025).
The study demonstrated that encapsulating BEMT in porous SiO₂ can reduce UV filter leakage, improve water-phase dispersibility and photostability, and prevent BEMT from penetrating the skin.
Patented Technology + Academic Research Building on its expertise in silica materials, SUNJIN Beauty Science continues to develop innovative technologies for encapsulating UV filters and incorporating them into cosmetic formulations.

<Why SUNSIL-S45?>

Why SUNSIL-S45 Stands Out Among UV Capsules
Compared with the original SUNSIL-S, SUNSIL-S45 increases BEMT loading from 30% to 45% and reduces capsule size from 7 μm to 4 μm.

1. Smaller Capsule Size (7 μm → 4 μm)
By reducing particle size, SUNSIL-S45 increases specific surface area, potentially improving UV filter dispersion efficiency and UV protection performance.

2. Higher BEMT Loading (30% → 45%)
More BEMT can be incorporated into each capsule, reducing the amount of silica required to achieve the same BEMT concentration in a formulation.

3. Low-Viscosity Formulations with High SPF (SPF 50, PA++++)
Using SUNSIL-S45, we developed an SPF 50, PA++++ sun serum with a lightweight, airy feel inspired by skincare formulations.

Achieve High UV Protection Without the Heavy Feel

SUNJIN Beauty Science’s SUNSIL UV Capsule enables the development of lightweight, airy sun care formulations.
Starting with SUNSIL-S45, we plan to progressively introduce new products featuring a high loading of 45% across a range of UV filters.
For technical information or sample requests, please contact us using the details below.

Q&A

Q1. What is SUNSIL UV Capsule?
SUNSIL UV Capsule is a UV capsule technology that encapsulates organic UV filters in porous silica, enabling them to be dispersed in the water phase. It allows formulators to incorporate organic UV filters into O/W sun care formulations while achieving a lightweight, airy feel.

Q2. What products are available in the SUNSIL UV Capsule portfolio?
The key products include SUNSIL-S (30% BEMT), SUNSIL-S45 (45% BEMT), SUNSIL-AB (Avobenzone), and SUNSIL-EHT (Octyl Triazone).

Q3. What is the difference between SUNSIL-S and SUNSIL-S45?
SUNSIL-S contains 30% BEMT, while SUNSIL-S45 contains 45% BEMT. SUNSIL-S45 features a higher UV filter loading and a smaller capsule size.

Q4. Can SUNSIL UV Capsule be used in O/W sunscreens?
Yes. SUNSIL UV Capsule can be used in O/W sunscreens, sun serums, sun essences, and sun lotions. By encapsulating organic UV filters in porous silica, it enables the development of water-dispersible organic UV filter systems.

Q5. What are the key benefits of SUNSIL UV Capsule?
Its key benefits include water-phase dispersion of organic UV filters, high UV filter loading, and a lightweight, airy sensory profile. It is particularly suitable for developing organic UV filter-based sun care products with a light, skincare-like feel.