SAM’U
SAM’U Water to Ampoule Treatment, 200ml
SAM’U Water to Ampoule Treatment, 200ml
@cosme rating: 5.9/7.0
A treatment that replenishes moisture and oil to dry hair and scalp
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
Couldn't load pickup availability
What it is
The lightweight, water-type texture provides hair with rich shine and body, achieving a moisturized finish. <Features> Formulated with 54% moisturizing ingredients that hydrate hair and support a moisturized finish. The ingredients warm up when they come into contact with water, allowing the treatment to gently care for hair like a steam pack. It adds shine and bounce to dry hair, keeping it soft. <Featured Ingredients> Biotin (moisturizing ingredient), Silk Amino Acids (hair protection and repair ingredient), Hydrolyzed Keratin (hair repair ingredient). <Texture & Fragrance> Fragrance: A citrus woody musk fragrance that blends fresh citrus with warm woody notes. Texture: The watery texture transforms into a refreshing essence, quickly delivering essential ingredients to the hair and scalp.
Ingredients
PG, denat. alcohol, BG, myristyl alcohol, water, methyl gluceth-20, cetrimonium chloride, 1,2-hexanediol, steartrimonium chloride, behentrimonium chloride, fragrance, panthenol, sorbitan caprylate, DPG, sodium lactate, glycerin, ethylhexylglycerin, avena strigosa seed extract, lecithin, potassium sorbate, citric acid, hydrolyzed keratin, silk amino acids, biotin, limonene
How to use
Apply generously to hair and massage gently until the water-type texture changes into a white serum, then rinse with water.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.
The non-sticky liquid treatment is very good and I feel like it makes my hair a little straighter. Like the shampoo, some people may like the scent and others may not. I think it's a good product.
It has the scent of shampoo and conditioner that Westerners use, and it lingers faintly until the next morning. This means it may interfere with other hair fragrances. The feel is not bad, and it actually gets warm when you take it out and apply it. Some people might even find it hot. When you first apply it, it makes your hair very smooth and silky to the touch, but once it dries, it doesn't look as smooth, and it doesn't control flyaways. However, it does make your hair more manageable and significantly reduces frizz. In the first place, in-bath water treatments are becoming less common, so if you miss that type, it's worth trying.