B Luxury
B Luxury The Repair Acid Heat Treatment Serum, 100ml
B Luxury The Repair Acid Heat Treatment Serum, 100ml
@cosme rating: /7.0
Acid Heat out-of-bath serum for smooth, shiny, beautiful hair
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
This leave-in, intensive, internally penetrating treatment uses hair beauty technology's acid heat treatment to leave your hair smooth and shiny. The acid heat treatment effect keeps your hair moisturized and shiny when you dry it with a hair dryer. It restores your hair to a healthy, slightly acidic state, leaving it moisturized and shiny.
Ingredients
Water, dimethicone, phenyl trimethicone, trideceth-20, glyoxylic acid, glyoxyloyl carbocysteine, glyoxyloyl keratin amino acids, hydrolyzed keratin, hydrolyzed collagen, hydrolyzed silk, isostearoyl hydrolyzed collagen AMPD, meadowfoam delta-lactone, chamomile flower extract, hydrolyzed royal jelly extract, argania spinosa kernel oil, avocado oil, jojoba seed oil, shea butter, carbomer, potassium hydroxide, butylene glycol, trehalose, calcium/sodium borosilicate, silver oxide, tocopherol, ethanol, phenoxyethanol, fragrance
How to use
After towel-drying your hair, spread an appropriate amount on your palm and then apply a thin layer, focusing on damaged areas. After application, use a hair dryer or hair iron to style your hair. The straightening iron will create and maintain smooth, sleek straight hair, while the curling iron will create and maintain lustrous curls.
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.
I've used the oil and it was great, so I bought this one. It's lighter than the oil, but the scent is nice and it gives my hair a moist, shiny finish even after ironing.
I've used up the mini size. I got it at the store. The Repair Acid Heat Treatment Serum is said to restore hair to a healthy, slightly acidic state, leading to a moisturized, smooth, and shiny texture. I don't really notice much improvement when drying my hair with a hair dryer, except that it's easier to manage. The color really makes an impact. I'll consider buying it if I have the chance.
I bought this on the recommendation of the store staff and it's a repeat purchase, but I also found it available here so I decided to buy it. My hair is rough, but it keeps it manageable and moisturized, and it's great for blow-drying.
I compared the products at the store before purchasing this. I highly recommend this for those with frizzy or wavy hair! It keeps my hair in place very well.
I received a gift from someone I met at work. First of all, I love the smell. (It reminds me of a woman coming back from the hair salon.) My hair feels smoother than usual after drying with a hair dryer.