8 the Thalasso
8 The Thalasso Smooth Coat & Rich Serum Hair Mask
8 The Thalasso Smooth Coat & Rich Serum Hair Mask
Rated 3.7 out of 7.0 by Japan's largest beauty community.
A moisturizing beauty serum hair mask 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 serum hair mask with a "Thalasso stem cell formula" that contains two types of stem cell extracts and seaweed extract. It contains a high concentration of serum ingredients, which intensively cares for severely damaged hair and provides intensive repair. The dense serum cream absorbs and penetrates every strand of hair, filling it with moisture and coating it from the inside. It leads to "smooth hair" that is smooth and easy to run your fingers through all the way to the ends. It can also be used as a special care product once or twice a week. Fruity floral scent.
Ingredients
Water, Cetyl Alcohol, Dimethicone, Stearyl Alcohol, Behentrimonium Chloride, Glycerin, Crithmum Maritimum Callus Culture Filtrate, Apple Fruit Cell Culture Extract, Sodium Alginate, Seawater, Squalane, Hydroxypropyl Chitosan, Laminaria Sinensis Extract, Cladosiphon Okinawani Extract, Hydrolyzed Conchiolin Protein, Porphyra Porphyra Root Extract, Succinoyl Atelocollagen, Isostearoyl Hydrolyzed Collagen, Ceramide NG, Cholesterol, Bisethoxydiglycol Cyclohexane-1,4-Dicarboxylate, Hydrolyzed Collagen, Hydrolyzed Keratin (Cashmere Goat), Hydrolyzed Silk, Phytosteryl/Octyldodecyl Lauroyl Glutamate, Vetiver Root Oil, Salvia Sclarea Oil, Origanum Majorana Leaf Oil, Lavender Water, Sandalwood Oil, Myristic Kernel Oil, Sage Oil, Illicium Vulgare Oil, Xanthan Gum, Lanolin Fatty Acids, Isostearic Acid, Zinc Sulfate, Disodium Phosphate, Potassium Phosphate, Lecithin, Pyridoxine HCl, Ethylhexyl Palmitate, Dicaprylyl Carbonate, Amodimethicone, Lanolin, Oleyl Alcohol, Steartrimonium Chloride, Sucrose Polyoleate, Distearyldimonium Chloride, Cyclopentasiloxane, Dicocodimonium Chloride, Aminopropyl Dimethicone, PEG-200 Hydrogenated Castor Oil, Butylene Glycol, Linseed Oil, Isostearyl Alcohol, Ceteth-20, Isopropyl Myristate, Alcohol, Tocopherol, Citric Acid, Sodium Benzoate, Phenoxyethanol, Isopropanol, Fragrance
How to use
After shampooing, lightly remove excess water, take an appropriate amount in your palm, spread it evenly, and apply it to your entire hair. Then rinse thoroughly. We recommend using it once or twice a week.
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 received this as a gift. Thank you. I had high hopes for it as it is a good match for Stella Seed's treatment. The texture is light and the scent is a unique unisex scent. A refreshing musk...or something like that. My hair feels smooth after washing, but becomes dry after drying. I feel like it lacks a little moisture. I prefer a smooth, moisturized feel, so I'm hesitant to repurchase, but I'll continue using it for a little longer.
My hair feels smooth after washing, and even after drying, it stays smooth and frizzy, with a lot less frizz! I have naturally curly hair, and I regularly get it straightened to improve its texture, but it tends to get dry and brittle due to timing, color, or dryness. After using this, I could immediately tell that my hair was smooth! That said, I didn't feel like I hadn't rinsed it enough or that it was too sticky. Even after drying, the volume was significantly reduced, and my hair felt softer! I have another hair mask that I'm interested in, and I'd like to consider repurchasing this one as well!
I received this as a gift from Suzykirei. Thank you! I've only used it twice, but here are my impressions so far. My hair is thick, full, and curly with little damage. It doesn't tangle much, but I do have some issues with dryness and frizz. I use Diane's brown shampoo and conditioner. After using this product, my hair feels a little smoother. It still feels a little smoother the next day, but it doesn't feel less frizzy, calm, or easy to manage. Also, as many people have mentioned, the scent is very unique, with a strong, perhaps floral scent. The scent fades after drying, so it's not particularly bothersome, but the first time I used it, I was surprised and wondered, "What was that scent?" I received it, so I'll use it until the end and write my review. P.S. I'm almost out, so I'll add a review. There's been no noticeable change from my initial impression... It's unfortunate that it didn't really suit me, even though I received it so kindly. Thank you to everyone who gave me the opportunity to try it.
I love the scalp massage brush from Hair Smoothing Eight The Thalasso, but this is the first time I've used the treatment. My hair is exposed to UV rays and colored every day, so it's pretty damaged and rough, but when I use this after shampooing, my hair becomes smooth and reduces volume. However, the fruity floral scent is similar to the scent of coloring agents and color shampoos, so I don't really like it... But I really like the finished product.
#Sponsored by #EightTheThalasso Sponsored by LIPS It makes my hair smooth. I've used carbonated shampoo and special treatment before, but Eight The Thalasso leaves my hair smoother and easier to run my fingers through. With the coming season, my hair tends to get dry due to UV rays, so I'd like to try this product for hair care.