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Description + Benefits + How To
FREE YOUR BLONDE
Masque Ultra-Violet Hair Mask by Kérastase is an intensely nourishing purple mask with ultra-violet neutralisers for blonde hair prone to brassiness. It's specially formulated with Hyaluronic Acid and Vitamins C+E and delivers instant nourishment, shine and long-lasting softness.
INSTANT NEUTRALISATION UP TO 3 DAYS OF SOFTNESS* UP TO 81% MORE NOURISHMENT*
*Instrumental test after application of Bain Ultra-Violet + Masque Ultra-Violet
The rich ultra‑violet thick cream strengthens the hair fibre to enhance resilience to daily stressors. It delivers an instant boost in smoothness, while neutralising pigments remove brassiness to reveal the hair's natural softness and purest light reflection.
How to keep your salon-fresh blonde bright & soft? With a combination of micronised nourishment + cuticle brightening formula
Pair Blond Absolu Masque Ultra-Violet Hair Mask with other products from the Blond Absolu range, like Bain Lumière Shampoo and Blonde Guard, for ultimate brightness and softness.
BENEFITS
Blonde Maintenance
Anti-Brass
Colour Maintenance
✔ Instantly neutralises brassy hair and yellow undertones to reveal the ultimate bright & hydrated-feeling blond. ✔ Nourishes hair and protects against oxidation to maintain a bright, soft, and vibrant cool tone.
INSTANT NEUTRALISATION UP TO 3 DAYS OF SOFTNESS* UP TO 81% MORE NOURISHMENT*
*Instrumental test after application of Bain Ultra-Violet + Masque Ultra-Violet
FREE YOUR BLONDE
Masque Ultra-Violet Hair Mask by Kérastase is an intensely nourishing purple mask with ultra-violet neutralisers for blonde hair prone to brassiness. It's specially formulated with Hyaluronic Acid and Vitamins C+E and delivers instant nourishment, shine and long-lasting softness.
INSTANT NEUTRALISATION UP TO 3 DAYS OF SOFTNESS* UP TO 81% MORE NOURISHMENT*
*Instrumental test after application of Bain Ultra-Violet + Masque Ultra-Violet
The rich ultra‑violet thick cream strengthens the hair fibre to enhance resilience to daily stressors. It delivers an instant boost in smoothness, while neutralising pigments remove brassiness to reveal the hair's natural softness and purest light reflection.
How to keep your salon-fresh blonde bright & soft? With a combination of micronised nourishment + cuticle brightening formula
Pair Blond Absolu Masque Ultra-Violet Hair Mask with other products from the Blond Absolu range, like Bain Lumière Shampoo and Blonde Guard, for ultimate brightness and softness.
BENEFITS
Blonde Maintenance
Anti-Brass
Colour Maintenance
✔ Instantly neutralises brassy hair and yellow undertones to reveal the ultimate bright & hydrated-feeling blond. ✔ Nourishes hair and protects against oxidation to maintain a bright, soft, and vibrant cool tone.
INSTANT NEUTRALISATION UP TO 3 DAYS OF SOFTNESS* UP TO 81% MORE NOURISHMENT*
*Instrumental test after application of Bain Ultra-Violet + Masque Ultra-Violet
Step 1: Apply to shampooed and towel-dried hair. Massage lengths and ends.
Step 2: Leave on for 3 to 5 minutes.
Step 3: Rinse.
In case of direct contact with eyes, rinse thoroughly with water. Avoid eye contact. Adult use only.
B/A PRODUCT CAROUSEL
BEFORE / AFTER
Illustration of the contemplated results obtained after applying:
Whatever your blonde hair: you dare, we care. The Blond Absolu collection provides intense nourishment and instant brightness to achieve a perfect blonde.
Blond Absolu maintains and perfects cool tones through deep ultra-violet neutralisers, intensely nourishes the hair fibre, and brightens hair.
KEY INGREDIENTS
Vitamins C+E Within the formula, Vitamin C & Vitamin E combine their power to brighten the fibre's cuticle and help maintain the integrity of the hair fibre.
Hyaluronic Acid Within this formula, two distinct molecular H.A. weights are used. In this formula, the low molecular weight H.A. penetrates the hair fibre, improving resistance, while the high molecular weight enhances smoothness and provides a plumping effect. When combined in the formula, this dual-action effect helps to deliver benefits both on the inside and outside of the hair fibre
AQUA / WATER / EAU
•
• PARAFFINUM LIQUIDUM / MINERAL OIL / HUILE MINERALE
•
•
•
•
•
•
•
•
•
• CI 60730 / ACID VIOLET 43
• CARVONE
• CITRUS AURANTIUM PEEL OIL
•
• LINALYL ACETATE
•
•
•
• PINENE
•
•
• CI 45100 / ACID RED 52
• SODIUM SULFATE
•
BLOND ABSOLU
ULTIMATE HAIR CARE FOR ALL TYPES OF BLONDE
Whatever your blonde hair: you dare, we care. The Blond Absolu collection provides intense nourishment and instant brightness to achieve a perfect blonde.
Blond Absolu maintains and perfects cool tones through deep ultra-violet neutralisers, intensely nourishes the hair fibre, and brightens hair.
Vitamins C+E Within the formula, Vitamin C & Vitamin E combine their power to brighten the fibre's cuticle and help maintain the integrity of the hair fibre.
Hyaluronic Acid Within this formula, two distinct molecular H.A. weights are used. In this formula, the low molecular weight H.A. penetrates the hair fibre, improving resistance, while the high molecular weight enhances smoothness and provides a plumping effect. When combined in the formula, this dual-action effect helps to deliver benefits both on the inside and outside of the hair fibre
AQUA / WATER / EAU
•
• PARAFFINUM LIQUIDUM / MINERAL OIL / HUILE MINERALE
•
•
•
•
•
•
•
•
•
• CI 60730 / ACID VIOLET 43
• CARVONE
• CITRUS AURANTIUM PEEL OIL
•
• LINALYL ACETATE
•
•
•
• PINENE
•
•
• CI 45100 / ACID RED 52
• SODIUM SULFATE
•
FRAGRANCE
TOP NOTES
ORANGE BLOSSOM, BERGAMOT, MANDARIN
HEART NOTES
PEONY, FIG, LAUREL
BOTTOM NOTES
CEDARWOOD, MUSK, CARDAMOME
FRAGRANCE
CALIFORNIA SPLASH
The fragrance is a contemporary clean‑luxury blend of dazzling citrus with blooming florals. With modernity at it's core, this aromatic signature leaves a lasting trail full of youth and audacity.
CALIFORNIA SPLASH
TOP NOTES ORANGE BLOSSOM, BERGAMOT, MANDARIN
HEART NOTES PEONY, FIG, LAUREL
BOTTOM NOTES CEDARWOOD, MUSK, CARDAMOME
The fragrance is a contemporary clean‑luxury blend of dazzling citrus with blooming florals. With modernity at it's core, this aromatic signature leaves a lasting trail full of youth and audacity.
PDP Section UGC Banner
FREE YOUR BLONDE!
The dream line up for all types of blondes. #FreeYourBlonde
FREE YOUR BLONDE!
The dream line up for all types of blondes. #FreeYourBlonde
PDP Section FAQs
FREQUENTLY ASKED QUESTIONS
Why does lightened and bleached hair get brassy?
Bleaching and lightening the hair means removing the hair’s natural pigments which can reveal unwanted undertones. When bleaching dark based hair colour, red or orange undertones can appear. Even light-based hair colour can reveal unwanted undertones when bleached. Blond Absolu Masque Ultra-Violet hair mask has Ultra-Violet Neutralisers in its formula to cancel out unwanted undertones and help get rid of brassiness.
Why should I use Masque Ultra-Violet?
Masque Ultra-Violet should be used to reduce hair's brassiness, and neutralise yellow undertones in order to reveal a bright & intensely nourished blonde.
How often should I use Masque Ultra-Violet?
Use Masque Ultra-Violet weekly to get rid of brassiness and unwanted undertones. Complement by using Cicaflash on other wash days.
Will the Masque Ultra-Violet make my hair purple?
We advise leaving the Masque Ultra-Violet hair mask on for a maximum time of 5 minutes then rinse off completely. This product does not stain nor will it turn your blonde hair purple if used properly.
PDP Section Routine Carousel
COMPLETE YOUR ROUTINE
BLOND ABSOLU
At Kérastase, we believe in the power of a complete haircare routine. Discover the products of this range and maximize your results!
Blonde Guard Hydrating Wonder Shield is an innovative leave-in for all blonde hair seeking protection from the main blonde aggressors: Heat, UV damages, Chlorine, Salt Water and Dryness.
Rated 5 out of
5 by
MJ567 from
OutstandingI used this k food the first time today, oh my it’s completely improved the colour and condition of my hair. I left it on for 5 minutes as my hair had gotten very brassy, it totally toned it down to a much cooler colour and it feels great, highly recommend and I’m so glad I took a chance on this product as it’s a considered purchase.
Date published: 2025-01-31
Rated 5 out of
5 by
Ik5511 from
Amazing maskI used it as combo with a purple shampoo and it's amazing. Never see purple mask working soooo good on yellow hair. Definitely my number 1 mask.
Date published: 2023-04-17
Rated 5 out of
5 by
Emmajane from
Amazing results on my yellow blonde!I had a tester of this treatment from my hairdresser and immediately ordered it. I was so unhappy with my yellow brassy blonde and ready to go dark again when she suggested a treatment mask once a fortnite (I only wash my hair twice a week). I left it on for 8 minutes and my hair is gorgeously soft and glossy and a perfect shade of cool light blonde again! No need to change my colour now I've found this!
Date published: 2023-03-17
Rated 5 out of
5 by
Hills from
Worth every pennyI don't normally buy expensive hair products, but after a lockdown home bleaching disaster I purchased this. It had an immediate positive effect on the terrible condition of the hair, made it manageable and also toned down the brassiness. Totally converted now.
Date published: 2021-04-09
Rated 5 out of
5 by
Kathryn from
Great for brightening and reducing brassy tonesI bought this about 2 months ago and it has completely transformed my hair! I used to have quite brassy ends but now they are looking much cooler and glossier.
I tend to leave it on for about 15 mins, instead of 10 as it makes quite a big difference.
Would definitely recommend.
Date published: 2021-03-18
Rated 3 out of
5 by
Dawn from
First trySwitched from my usual nutritive and resistance range . It dies not have the punch kerastase smell I had hoped for . Didn’t feel as luxurious while I was applying and the texture was so thick I seemed to use quiet a bit . Not as conditioning as Expected . The couloir of my highlighted hair seem to brighten up though . However I was slightly disappointed so I will revert back to my normal ranges !
Date published: 2021-01-09
Rated 1 out of
5 by
Shaunagh from
Extreme colour warning!!!As with all hair masks, I left this on longer than the guide on box, it totally changed my hair colour from blonde to grey and a lilac. I understand I dint follow instruction but the result was so severe there should be a warning that the primary function is colouring your hair not conditioning it. My hairdresser had to put 2 colour correctors on my hair and still remnants of lilac remain.
Date published: 2019-10-04
Rated 4 out of
5 by
Lizzie from
It works!This product actually works ! and removes brassiness from highlighted blond hair . BUT do use disposable gloves as required despite the video declaring "use disposable gloves when applying" and also states that on the box ,the girl in the video is using bare hands !!. I forgot to use the gloves on one occasion and my hands and arms became very itchy and I had a rash . So be careful if you have sensitive skin . the first time I tried it I left it on for longer than 10mins -more like 15 and I had to wash and wash it out over and over again to remove the product as my hair was looking grey ! I now do 8-10 mins only and its fine . I am pleased with this product .