KLAIRS - Fundamental Watery Oil Drop 50ml

The Fundamental Watery Oil Drop resolves skincare’s oldest standoff: skin that needs an oil’s nourishment versus a person who cannot stand an oil’s finish. It is a water-based serum carrying the rich hydration of a facial oil — all of the cushion, none of the slick — in a non-sticky texture that absorbs like the serum it technically is.

Why It Works

The formula earns the “fundamental” name with a four-part build: green tea for antioxidant defense, ferment extracts — K-beauty’s absorption-friendly nutrients — supporting skin regeneration, ceramide reinforcing the barrier that holds moisture in, and peptides adding the anti-aging signal. It is oil-benefits by architecture rather than by grease: dehydrated skin gets deep, lasting comfort, aging skin gets active support, and nobody’s pillowcase pays for it.

How to Use

Morning and evening after toner: a dropper’s worth pressed into skin, then cream. Dry skin can layer it under the Rich Moist Soothing Cream for a hydration double; dehydrated-but-oily skin can wear it as the whole treatment step. Which one is you? Dehydrated vs dry, explained.

Who It’s For

Dehydrated skin that dislikes facial oils, combination skin whose cheeks and T-zone want different things, and anyone building gentle anti-aging without heavy textures. It is the Fundamental line’s cleverest bottle. More options in Korean serums.

FAQ

Is it an oil or a serum?

A water-based serum engineered to deliver oil-level hydration — the format of a serum, the payoff of an oil, the finish of neither being greasy.

Will it work for oily skin?

That is its specialty audience: oily and combination skin that is secretly dehydrated gets the moisture without the shine. If pure oils have always felt like too much, start here.

Where does it go in a routine?

The serum slot — after toner, before cream. It layers under other treatments peacefully and plays the buffer role beautifully alongside stronger actives.

100% authentic, sourced from verified Korean distributors. Explore the full KLAIRS collection, more Korean serums, and the complete KLAIRS brand guide.