8 the Thalasso
8 The Thalasso Balancing Serum & Smooth Repair Hair Oil
8 The Thalasso Balancing Serum & Smooth Repair Hair Oil
Rated 5.2 out of 7.0 by Japan's largest beauty community.
A moisturizing beauty serum hair oil that leaves your hair smooth and silky all the way to the ends.
✓ 100% authentic. Direct from brand or official stores only
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Track your order via your national carrier (USPS / Royal Mail)
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What it is
A beauty serum hair oil with a "Thalasso stem cell formula" that contains stem cell extract and seaweed extract. It balances the moisture and oil content of dry hair, penetrates into hair without stickiness, and leaves it fresh and shiny. It is a smooth, multi-purpose oil that is easy to use even for beginners, and approaches hair problems such as "dryness, frizz, frizz, wavy hair, stiffness, frizz due to humidity, and UV damage" from multiple angles. Recommended for those who want a smooth, light finish and those with soft hair. Can be used as a daytime styling product, on wet or dry hair. Fruity floral scent.
Ingredients
Cyclopentasiloxane, dimethicone, caprylic/capric triglyceride, dimethiconol, apple fruit cell culture extract, isostearoyl hydrolyzed silk, isostearoyl hydrolyzed collagen, ceramide NG, meadowfoam-δ-lactone, di(phytosteryl/octyldodecyl) lauroyl glutamate, squalane, orange roughy oil, laminaria ochroleuca extract, sage oil, salvia sclarea oil, meat Zucchini Kernel Oil, Sandalwood Oil, Marjoram Leaf Oil, Illicium Verum Oil, Lavender Oil, Vetiver Root Oil, Lecithin, Cholesterol, Lanolin Fatty Acids, Amodimethicone, Ethylhexylglycerin, Dicaprylyl Carbonate, Isononyl Isononanoate, Isostearyl Alcohol, Isostearic Acid, Isopropyl Myristate, Xanthan Gum, Glycerin, Tocopherol, Water, Phenoxyethanol, C12-15 Alkyl Benzoate, Fragrance
How to use
Spread an appropriate amount onto your palm and apply it to areas of concern such as damaged hair and the ends, then blend it into your entire hair. Can be used on both wet and dry hair.
We ship internationally from Japan!
Frequently Asked Questions
Are the products you sell authentic?
Authenticity is 100% guaranteed. We source directly from the brand, or from official stores within Japan.
All products are fresh off the shelves and never outdated.
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.
I'll definitely buy it again! I have hair that isn't wavy or thick, but tends to get dry easily, so I bought this Smooth formula. As other reviews and social media have mentioned, I apply it in the morning or before blow-drying. The light texture makes it feel a little underwhelming, but even if you apply a little more, it doesn't feel sticky and leaves my hair smooth and shiny, so I recommend it! The scent is a little similar to men's hair styling products, but it's not too bothersome.
My hair is thin and often tangled, but after using this it's smooth and silky!!
I'm currently using Eight the Thalasso shampoo and treatment, so I decided to buy this. I wish I had bought this sooner! It makes my hair so smooth. This is what smooth hair feels like! I think that's what smooth hair feels like! I'll definitely be buying this again. I love it!
Eight the Thalasso Balancing Serum & Smooth Repair Serum Oil has a lovely scent and I apply it to the ends of my hair as a finishing touch. It makes my hair shiny and is easier to use than other products, so I've repurchased it many times and love it!
My hair becomes shiny and manageable. I use it after shaving and before drying with a hair dryer, and it makes my hair smooth and shiny after drying. It doesn't have a strong smell, so I think it's easy to use.