This review dives deep into the KOSAS Revealer Skin Improving Foundation SPF 25, exploring its performance on oily skin. We'll examine its unique gel-like texture, application methods, and buildable coverage capabilities. Discover whether this foundation lives up to its promise of a natural, radiant finish while addressing concerns like pore visibility and longevity. We'll also discuss its scent, a key aspect often mentioned in other reviews. This comprehensive analysis will help you determine if the KOSAS Revealer Foundation is the right fit for your skincare routine, especially if you have oily skin.This in-depth review covers everything from the elegant packaging and initial application experience to its wear throughout the day, including mask-wearing conditions. We'll discuss the foundation's ability to conceal imperfections, its long-lasting power, and its overall impact on the skin's appearance. The final verdict includes a star rating and addresses whether the foundation's claims are justified, offering valuable insight for potential buyers considering adding this product to their makeup bag.
Pros And Cons
- Medium to full buildable coverage
- Hydrating
- Gives a natural, glowy finish
- Blends well with cream contour and blush
- Doesn't cling to dry patches
- Long-lasting (minimal touch-ups needed after 8 hours)
- Contains skincare ingredients (hyaluronic acid, niacinamide, peptides, squalene, vitamin B5, arnica, caffeine)
- SPF 25 with no flashback in photos
- Hypoallergenic and non-acnegenic
- Feels like skincare, not makeup
- Initial weird smell (described as wet rug)
- Doesn't blur pores as claimed, although setting powder helps
- Can become oily in certain areas after 8 hours
Read more: Hydrating Foundation for Dry Skin: Top 5 Picks
Packaging and First Impressions
The KOSAS Revealer Skin Improving Foundation arrived in sleek, minimalist packaging, typical of the brand's aesthetic. The bottle is elegant and feels high-quality. The foundation itself has a unique, almost gel-like consistency; unlike other liquid foundations I've used.
One pump dispensed enough product for half my face, and the initial texture felt slightly unusual, as if it was on the verge of setting. I used a brush for my first layer, but the finish was a bit flat.
Application and Blendability
Switching to a damp sponge significantly improved the application process. The foundation blended much more seamlessly, creating a more natural, skin-like finish. It has an unusual smell, which is described as smelling like a wet rug.
The thin consistency of the foundation allows for easy buildable coverage. Despite the initial concerns, the foundation has a wonderful glowy look after the application. It felt hydrating and comfortable on the skin, almost like skincare.
Coverage and Finish
The KOSAS foundation provides a medium to full buildable coverage. My hyperpigmentation was effectively concealed, and the overall effect was a natural-looking glow. Initially, pores were visible, but setting powder helped to minimize their appearance.
The finish is described as dewy, yet it didn’t look oily, enhancing the overall radiance of my skin. Even after applying contour and blush, the foundation held up beautifully, not shifting or settling into fine lines.
Wear Test and Longevity
After four hours, the foundation remained largely intact despite mask wear, showcasing impressive longevity. A small amount of transfer occurred where the mask touched. The initial dewy look mellowed slightly, becoming more naturally matte.

At the eight-hour mark, some oiliness emerged on my forehead, nose, and cheeks. After blotting, the coverage remained medium, and the overall look was surprisingly good considering the duration. It still looks very decent and didn't show excessive wear.
Final Thoughts and Rating
I'm giving the KOSAS Revealer Foundation a 4.5 out of 5 stars. The coverage, longevity, and natural finish are exceptional. The slightly unusual scent is a minor drawback, but it fades quickly. It did not minimize my pores as promised but didn’t highlight them either.
The foundation's hydrating properties and skin-like feel are significant positives. I appreciate its SPF 25 and lack of flashback in photos. This foundation could be a great everyday option for various skin types, providing a beautiful, healthy-looking complexion.