Does it leave an oily, heavy or sticky finish?

It has a light, fast-absorbing texture without a sticky, heavy or oily finish.

How many drops should I use, and where does it go in my routine?

After cleansing and toning, apply 2–3 drops and massage the serum over your face and down toward your neck. Follow with moisturizer.

Which skin types is this serum intended for?

It’s intended for all skin types and is especially recommended for oily skin lacking moisture. It has also completed primary irritation testing, including testing for sensitive skin.

Is the formula fragrance-free?

Yes. The formula is fragrance-free.

Is the product vegan-friendly and cruelty-free?

Yes. The product is labeled vegan-friendly and cruelty-free.

How long should I use it after opening?

Use it within 12 months after opening. Its listed expiry is 36 months from the manufacturing date.

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KLAIRS

Fundamental Watery Oil Drop

What it is: A water-based, oil-like moisturizing serum that helps hydrate and reduce moisture loss while leaving a light, non-sticky finish.

Helps hydrate and reduce moisture loss
Light, fast-absorbing finish
For all skin types
Fragrance-free formula

Net weight: 50 mL

Fundamental Watery Oil Drop

50ml ·$13.99 USD

Helps hydrate and reduce moisture loss

Light, fast-absorbing finish

For all skin types

Fragrance-free formula

Main active: Green Tea
Intensity: Supportive

PRODUCT DETAILS

Hello, hydration—with an oil-like touch. Fundamental Watery Oil Drop is a water-based moisturizing serum, not a conventional facial oil. It sits in a soft middle ground between watery hydration and oil-like richness, with a light, fast-absorbing feel without a sticky or oily finish.

The serum helps hydrate and reduce moisture loss, supporting a hydrated, glowing appearance. It’s intended for all skin types, especially oily skin that feels short on moisture. That balance makes it a thoughtful choice when you want moisture without trading it for a greasy after-feel.

Jeju green tea water is featured to help reduce moisture loss. Ceramide NP, fermented extracts and a peptide duo also appear in the formula, supporting its hydrated, glowing-skin story. The formula is fragrance-free, vegan-friendly and cruelty-free.

Learn more

GOES WELL WITH

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Lotion$14.99 USD

1025 Dokdo Sleeping Pack$15.99 USD

1025 Dokdo Cream$24.99 USD

1025 Dokdo Pad$20.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

Explore its moisture support, hydrated glow and light, non-sticky finish.

Hydration without heaviness
A hydrated-looking glow
Fragrance-free care

Key Ingredients

Pressed, pointed Camellia sinensis leaves partially magnified by a translucent jade glass lens on a warm oat surface.

Green Tea

Specific tea-leaf formulas may support hydration and a smoother, less shiny look.

Overlapping ivory wax-like layers on a warm blush background, representing ceramide barrier lipids.

Ceramides

Barrier-supporting lipids that help reduce moisture loss and ease visible dryness.

Clear hydrogel spheres and droplets on a pale lilac background.

Hyaluronic Acid

Helps hydrate and visibly plump the skin.

Translucent amber gel folded into soft sculptural waves, surrounded by rounded droplets on a warm peach surface.

Bifida Ferment Extract

A ferment-derived ingredient that helps improve the look and feel of uneven skin texture.

Translucent watery serum swatch on a light gray background.

Concerns & Benefits

Your Concerns

1
Dehydration
For skin that feels short on moisture, including oily skin that still needs hydration.
2
Dullness
For a complexion that could use a more hydrated, glowing appearance.
3

How To Use

1After cleansing and toning, apply 2–3 drops to your face.
2Massage the serum over your face and down toward your neck. Leave it on and follow with moisturizer.

A hand holding a glass dropper above an open palm.

Frequently asked questions

Is Fundamental Watery Oil Drop a serum or a facial oil?

It’s a water-based moisturizing serum with oil-like richness, not a conventional facial oil.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemFundamental Watery Oil Drop$13.99 USD

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cleanser$11.99 USD

Total price: $44.97 USD

This itemFundamental Watery Oil Drop$13.99 USD

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cleanser$11.99 USD

Total price: $44.97 USD

ROUND LAB

1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml$18.99 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz$22.99 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

ROUND LAB

1025 Dokdo Sleeping Pack

A lightweight, unscented overnight gel for hydration and smoother-feeling skin.

100 ml$15.99 USD

ROUND LAB

1025 Dokdo Cream

A rich, unscented balm moisturizer for lasting hydration and a soft, cushioned feel.

80 ml$24.99 USD

ROUND LAB

1025 Dokdo Pad

Two-sided toner care for tidier texture and balanced moisture.

70 pads / 120 g$20.99 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD

KLAIRS Fundamental Watery Oil Drop Serum 50 mL

KLAIRS

Fundamental Watery Oil Drop

What it is: A water-based, oil-like moisturizing serum that helps hydrate and reduce moisture loss while leaving a light, non-sticky finish.

Helps hydrate and reduce moisture loss
Light, fast-absorbing finish
For all skin types
Fragrance-free formula

Net weight: 50 mL

Fundamental Watery Oil Drop

50ml ·$13.99 USD

Helps hydrate and reduce moisture loss

Light, fast-absorbing finish

For all skin types

Fragrance-free formula

Main active: Green Tea
Intensity: Supportive

PRODUCT DETAILS

Learn more

GOES WELL WITH

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Lotion$14.99 USD

1025 Dokdo Sleeping Pack$15.99 USD

1025 Dokdo Cream$24.99 USD

1025 Dokdo Pad$20.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

Explore its moisture support, hydrated glow and light, non-sticky finish.

Hydration without heaviness
A hydrated-looking glow
Fragrance-free care

Key Ingredients

Bifida Ferment Extract

A ferment-derived ingredient that helps improve the look and feel of uneven skin texture.

Concerns & Benefits

Your Concerns

1
Dehydration
For skin that feels short on moisture, including oily skin that still needs hydration.
2
Dullness
For a complexion that could use a more hydrated, glowing appearance.
3

How To Use

1After cleansing and toning, apply 2–3 drops to your face.
2Massage the serum over your face and down toward your neck. Leave it on and follow with moisturizer.

Frequently asked questions

Is Fundamental Watery Oil Drop a serum or a facial oil?

It’s a water-based moisturizing serum with oil-like richness, not a conventional facial oil.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemFundamental Watery Oil Drop$13.99 USD

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cleanser$11.99 USD

Total price: $44.97 USD

This itemFundamental Watery Oil Drop$13.99 USD

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cleanser$11.99 USD

Total price: $44.97 USD

ROUND LAB

1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml$18.99 USD

ROUND LAB

1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

ROUND LAB

1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz$22.99 USD

ROUND LAB

1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

ROUND LAB

1025 Dokdo Sleeping Pack

A lightweight, unscented overnight gel for hydration and smoother-feeling skin.

100 ml$15.99 USD

ROUND LAB

1025 Dokdo Cream

A rich, unscented balm moisturizer for lasting hydration and a soft, cushioned feel.

80 ml$24.99 USD

ROUND LAB

1025 Dokdo Pad

Two-sided toner care for tidier texture and balanced moisture.

70 pads / 120 g$20.99 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD