![image of bust your brass cool blonde strength repair shampoo 9.2oz / 275ml.](https://cdn.shopify.com/s/files/1/2117/1151/files/shadow_2000x2000_2.png?v=1734538352&width=100&height=100&crop=center)
![texture image of the bust your brass cool blonde strength repair shampoo](https://cdn.shopify.com/s/files/1/2117/1151/products/4-TextureShot_2.jpg?v=1734538352&width=100&height=100&crop=center)
![the bust your brass shampoo and conditioner duo is designed for blondes, silvers, and grays, offering a solution to brighten and tone brassy hues. Clinically proven to make hair 2.2x stronger with 55% less breakage, the system also delivers softer, more manageable hair while being color-safe. The sleek lavender bottles, set against a modern purple backdrop, highlight the duo’s ability to neutralize warm tones and maintain vibrant, healthy-looking hair.](https://cdn.shopify.com/s/files/1/2117/1151/files/01_byb_benefits_2000x2000_5506730f-a7b4-4f02-81f6-4e3b5794c620.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass system visibly tones and strengthens blonde, silver, and gray hair. the before image shows a model's hair with brassy, warm tones, while the after reveals cooler, brighter hues with enhanced vibrancy and shine. The product helps neutralize brassiness, leaving hair looking healthier, stronger, and more refreshed.](https://cdn.shopify.com/s/files/1/2117/1151/files/02_byb_BA_model-2_2000x2000_c5d92069-4cfa-4d45-a0e7-0c492216527e.jpg?v=1734555812&width=100&height=100&crop=center)
![amika’s bust your brass system tones and strengthens blonde, silver, and gray hair. the before image shows a model's hair with brassy, warm tones, while the after highlights cooler, brighter hues with refreshed vibrancy and shine. hair appears healthier, stronger, and more balanced, with brassiness visibly neutralized.](https://cdn.shopify.com/s/files/1/2117/1151/files/03_byb_BA_model-2_2000x2000-1.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass system features hair-loving ingredients to tone and strengthen hair. plant butters, including vitamin-rich mango butter, shea butter, and borage oil, nourish and hydrate. ultra-violet pigments counteract yellow and brassy tones for cooler hues. bond fortifying technology targets and strengthens the bonds in hair most prone to breakage, leaving hair healthier and more resilient.](https://cdn.shopify.com/s/files/1/2117/1151/files/04_byb_ingredients_2000x2000_b0aa6023-08d8-40ad-a448-b1006e861aaa.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass system delivers softer, brighter, and more manageable hair. this image highlights healthy, vibrant blonde tones with smooth texture and radiant shine, showcasing the product’s ability to maintain and enhance lighter hair shades.](https://cdn.shopify.com/s/files/1/2117/1151/files/05_byb_ideal-for_2000x2000_904d4499-7343-45bd-8cfe-a6dfdfd35747.jpg?v=1734555812&width=100&height=100&crop=center)
![wave bye-bye to brass with the bust your brass system. the bust your brass shampoo and conditioner duo is designed for blondes, silvers, and grays, offering a solution to brighten and tone brassy hues. the bust your brass mask offers intensive conditioning to neutralize warm tones and maintain vibrant, healthy-looking hair.](https://cdn.shopify.com/s/files/1/2117/1151/files/06_byb_when-to-use_2000x2000_4391221b-433a-4bf5-9a88-a8fb43ed3ef6.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass system visibly tones and strengthens blonde, silver, and gray hair. The before image shows a model's hair with brassy, warm tones, while the after reveals cooler, brighter hues with enhanced vibrancy and shine. The product helps neutralize brassiness, leaving hair looking healthier, stronger, and more refreshed.](https://cdn.shopify.com/s/files/1/2117/1151/files/07_byb_BA_model-3_2000x2000_83c5da24-67a2-4782-8d02-f24355c6be70.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass system visibly tones and strengthens blonde, silver, and gray hair. The before image shows a model's hair with brassy, warm tones, while the after reveals cooler, brighter hues with enhanced vibrancy and shine. The product helps neutralize brassiness, leaving hair looking healthier, stronger, and more refreshed.](https://cdn.shopify.com/s/files/1/2117/1151/files/08_byb_BA_model-4_2000x2000-1.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass system visibly tones and strengthens blonde, silver, and gray hair. The before image shows a model's hair with brassy, warm tones, while the after reveals cooler, brighter hues with enhanced vibrancy and shine. The product helps neutralize brassiness, leaving hair looking healthier, stronger, and more refreshed.](https://cdn.shopify.com/s/files/1/2117/1151/files/09_byb_BA_model-1_2000x2000-1.jpg?v=1734555812&width=100&height=100&crop=center)
![the bust your brass wash duo is color safe*, vegan, cruelty-free, contains no mineral oil, phthalate-free, paraben-free, sles + sls-free, and is suitable for chemically treated hair. *clincally proven when shampoo + conditioner are used as a system.](https://cdn.shopify.com/s/files/1/2117/1151/files/11_byb_freefrom_2000x2000_7e2a03d4-053a-4f7b-936b-74530e6c1140.jpg?v=1734555605&width=100&height=100&crop=center)
![An image depicting the core ingredients in our signature scent: sandalwood, orchid, vanilla, grapefruit, and rose](https://cdn.shopify.com/s/files/1/2117/1151/files/Frangance_Desktop_-_Infographic_with_text.png?v=1736790449&width=100&height=93&crop=center)
![image of bust your brass cool blonde strength repair shampoo 33.8oz / 1L.](https://cdn.shopify.com/s/files/1/2117/1151/files/shadow_2000x2000-1_e17141e5-45d3-4f14-b74f-4bce10f30593.png?v=1734555536&width=100&height=100&crop=center)
bust your brass
cool blonde strength repair shampoo
![](https://cdn.shopify.com/s/files/1/2117/1151/products/amika_221107_PDP_ForeverFriend_Tritan_Refill_Shampoo_300ml_orange_pump_0609-RGB-trans-shadow-2000x2000.png?v=1678307503&width=100&crop=center)
forever friend
refillable shampoo bottle
refillable + reusable shampoo bottle made with BPA-free and EA-free Eastman Tritan ™️ plastic. holds 300ml / 10oz
takeMeThereproduct details
what is bust your brass cool blonde strength repair shampoo?
an ultra-violet shampoo that tones brassy hues + is clinically proven to strengthen + hydrate damaged hair.
who it's for
all blondes, grays, and silvers 1-4c, + high porosity hair
why it's special
wash your way to a brighter + healthier looking blonde! packed with bond fortifying technology, quinoa protein, plant butters + ultraviolet pigments, this purple shampoo keeps your blonde lookin' cool and strong.
bust your brass cool blonde strength repair shampoo is clinically proven to tone, hydrate + strengthen strands, resulting in 2.2x stronger hair* with 55% less breakage.*
safe for strands: clinically proven to be safe for color-treated hair.**
*after 1 use when used as a system, clinically tested.
**clinically tested when shampoo and conditioner are used as a system.
how to use?
![bust your brass routines by blonde type infographic](https://cdn.sanity.io/images/3x9887l8/usa/20e036005ace411f0398910353811620bb8c257b-1500x1500.jpg)
- massage through wet hair.
- rinse.
safety information:
avoid contact with eyes.
ingredients
key ingredients
- bond fortifying technology: helps target + strengthen the bonds in hair most prone to breakage due to environmental stressors, heat, chemical treatments, + more.
- plant butters: vitamin-rich mango butter, borage oil + shea butter.
- vegan proteins: derived from quinoa + provide keratin-like benefits.
- ultra-violet pigments: counteract yellow + brassy tones to bring out the best shades of blonde, silver + gray.
full ingredients
water/aqua/eau, sodium c14-16 olefin sulfonate, cocamidopropyl betaine, glycerin, sodium methyl cocoyl taurate, disodium cocoamphodiacetate, peg-7 glyceryl cocoate, glyceryl stearate, hippophae rhamnoides (sea buckthorn/argousier) fruit/seed oil, borago officinalis (borage/bourrache) seed oil, persea gratissima (avocado/avocat) oil, mangifera indica (mango/mangue) seed butter, butyrospermum parkii (shea/karite) butter, hydroxypropyl guar hydroxypropyltrimonium chloride, lavandula angustifolia (lavender/lavande) flower extract, chamomilla recutita (matricaria/matricaire) flower extract, rosmarinus officinalis (rosemary/romarin) leaf extract, hydrolyzed quinoa, aminomethyl propanol, bis-pca dimethicone, butylene glycol, disodium edta, disodium peg-12 dimethicone sulfosuccinate, peg-55 propylene glycol oleate, peg-12 dimethicone, peg-150 distearate, peg-150 stearate, polyquaternium-10, polyquaternium-7, polysorbate 20, propylene glycol, polyethylene glycol, citric acid, dehydroacetic acid, benzyl alcohol, phenoxyethanol, potassium sorbate, sodium benzoate, benzoic acid, stearic acid, sodium chloride, fragrance/parfum, benzyl benzoate, hydroxycitronellal, limonene, ext. violet 2 (ci 60730)
please be aware that ingredient lists may change or vary from time to time. to confirm that an amika product is suitable for your personal use, please reference the list of ingredients that is included on your product packaging.
where it's made
usa
sustainability
contains recycled material: 33.8 oz / 1 l, 9.2 oz / 275 ml, and 2 oz / 60 ml contain post consumer recycled plastics (PCR). PCR has a lower impact compared to virgin plastics.
reduction strategy: 16.9 oz / 500 ml uses less material than our standard bottles. when combined with our forever bottles you support a refill model, which helps us produce less material overall.
HOW TO RECYCLE
![Climate Neutral](https://cdn.shopify.com/oxygen-v2/26498/10886/22614/1397367/build/_assets/climate-neutral-logo-I3UF4WLI.png)
![B Corporation](https://cdn.shopify.com/oxygen-v2/26498/10886/22614/1397367/build/_assets/b-corp-logo-WKJMVKJG.png)
![color safe icon](https://cdn.sanity.io/images/3x9887l8/usa/a8a759da0dfe0a00a3626d89ae7dd98fe97b6f3f-261x261.png)
![keratin safe icon](https://cdn.sanity.io/images/3x9887l8/usa/c90f6f100e3f928e41af259553aaf44d83b0fd7b-261x261.png)
![paraben free icon](https://cdn.sanity.io/images/3x9887l8/usa/3a696bfaf8f7d9bb0bb03714ac284cd169712b18-261x261.png)
![sulfate free icon](https://cdn.sanity.io/images/3x9887l8/usa/fe4268140212e018e33b5772efc1cd3ee5c55cff-261x261.png)
wash, condition and hair mask your way to a brighter + healthier looking blonde
86% more repair and 55% less breakage after 1 use when used as a system, clinically tested.
works well with...
![person holding bust your brass cool blonde shampoo and conditioner and bust your brass cool blonde intense repair mask](https://cdn.sanity.io/images/3x9887l8/usa/839e54fb0cf7fde7ac84f09eed634f4bf84ace7f-855x500.jpg)
A-train: 5 steps to a bright blonde blowout
![model with platinum blonde hair](https://cdn.sanity.io/images/3x9887l8/usa/8fed58b11a9f8bd9c9436dfee53e80f7c02137c6-855x500.jpg)
how to find your perfect hair routine for your shade of blonde
![person's hair being washed with purple shampoo in hair salon](https://cdn.sanity.io/images/3x9887l8/usa/a869e765c02e197c2e66f12447de3727e052137f-855x500.jpg)
how to maintain your icy blonde hair
![blonde collection product line](https://cdn.sanity.io/images/3x9887l8/usa/35536684be2e6cb92b2a0c6627b91d18987e1359-855x500.jpg)
NEW + updated blonde collection spotlight: how to get rid of brassiness in blonde hair
FAQ
is this color safe?
yes! bust your brass is suitable for color-treated hair.
is this safe for keratin, Brazilian, or other chemically treated hair?
yes!
what is the amika signature scent?
an intoxicating blend of warm vanilla, spicy sweet clover + fresh citrus.