B:treat
B:treat Vitreat Eyelash Extension Mascara (Black)
B:treat Vitreat Eyelash Extension Mascara (Black)
@cosme rating: 5.0/7.0
Revive your eyelash extensions with mascara! Mascara made specifically for eyelash extensions!
✓ 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
Good news for women with eyelash extensions. Introducing a mascara specifically designed for eyelash extensions! Revive your lashes with this mascara! ▼Brush: The triangle brush prevents snagging on eyelash extensions and straightens the flow of each lash, preventing clumping and straightening each individual lash for beautiful separation. ▼Black coating that fills in gaps: The black film naturally fills in gaps in eyelash extensions that have fallen out over time, adding a healthy shine. ▼Damage care with serum: Eight beauty ingredients provide intensive care for lashes damaged by extensions and dryness, maintaining firm, shiny, and strong eyelashes that rival those of eyelash extensions. ▼Easy to remove with warm water: The film type comes off easily with warm water, yet is resistant to sebum and sweat. It doesn't put a strain on your eyelashes every day, and with thorough cleansing, your eyelash extensions will stay beautiful and last longer.
Ingredients
Water, Iron Oxides, Acrylates/Ethylhexyl Acrylate Copolymer, Beeswax, Acrylates Copolymer, Butylene Glycol, PVP, Carnauba Wax, Glyceryl Stearate, Isopropyl Lanolinate, Palmitic Acid, Triethanolamine, Stearic Acid, Phenoxyethanol, Aluminum/Magnesium Silicate, Laureth-23, Methylparaben, Fragrance, Butylparaben, Tocopheryl Acetate, Squalane, Phellinus Linalool Extract, Glycyrrhiza Ural Root Extract, Panthenol, Hydrolyzed Keratin, Royal Jelly Extract, Placenta Extract, Laureth-21, 1,2-Hexanediol, Arachidic Acid, Disodium EDTA, Lauric Acid, Myristic Acid, Oleic Acid
How to use
Apply the liquid to the brush and comb it over your eyelashes and eyelash extensions. Apply the liquid a little away from the base to avoid getting the brush caught on the adhesive part of the extensions. It can also be used on eyelashes without extensions.
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 usually wear Paris lash extensions, and I always have trouble with uneven coverage for a week or two before I need to replace them, but this mascara has a lot of fibers and covers up any areas where my eyelash extensions have fallen off in a really natural way! If the fibers stick so beautifully, I wonder if just using eyelash perm is enough?! I'm also grateful that it can be removed with warm water!
I usually use it on my lower lashes, and it's also useful when my lash extensions start to fall apart and gaps appear! I always wear mascara on my lower lashes because it makes a huge difference in the look of my makeup, but personally, there are some key points to using it on the lower lashes: it doesn't create dark circles, it comes off easily with makeup remover, it doesn't clump, and it gives a moderate amount of volume and length. Not only does it not create dark circles, but being waterproof yet removable with makeup remover is extremely important, and this product ticks all the boxes, so I've already used several bottles. Of course, when my lash extensions start to fall apart and gaps appear, it fills them in naturally and doesn't put any strain on the extensions when I remove it.
I use it on top of my eyelash extensions when they start to wear off! It spreads well and applies beautifully! I also apply it to my lower lashes, and it's cleaner and spreads better than regular mascara! This is the only thing I can use.
It comes off easily with warm water or face wash, so it helps my eyelash extensions last longer. There aren't many mascaras that can be used with eyelash extensions, so I'm very grateful that this mascara gives me volume and length. However, the liquid tends to bead up, and I personally find the brush to be too big. Also, the scent is berry-like, which I'm not particularly fond of, so it's harsh on my nose until it dries.
I've tried several mascaras that are OK for eyelash extensions, and this one doesn't clump, and it makes thinning or gaps in your lashes look beautiful and long. I've been buying it for a while now, and this is my third one.