bust your brass | cool blonde strength repair conditioner

$14.5 ~~$29~~ In stock

Category: straight (1a-c)

condition + tone your way to a brighter blonde + 2.2 stronger hair*

what is bust your brass cool blonde repair shampoo?

a blonde's best-kept secret. this ultra-violet conditioner tones unwanted brassy hues, while resulting in 2.2x stronger hair* with 55% less breakage.*

who it's for

all blondes, silvers + grays 1–4c looking to cool warm tones

why it's special

packed with bond fortifying technology, quinoa protein, plant butters + ultraviolet pigments, this purple conditioner keeps your blonde lookin' cool + strong.
bust your brass cool blonde strength repair conditioner 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 + conditioner are used as a system.

how to use

how-to get your strongest + brightest mane

please note: we suggest applying the bust your brass products on a test strip of hair at the nape of the neck before settling on a routine.

customize your bust your brass routine!
if you are a natural (non-color treated) blonde:

in the summer months (when hair is more likely to become brassy), use the bust your brass shampoo + conditioner every other wash.
use the bust your brass repair mask 1x per week in place of conditioner.

liter pumps how-to:
the pumps will need to be opened/unlocked prior to putting them in your liter-sized bottles -- these pumps have a tight lock on them (so that you can re-lock if needed for travel or storage, and be assured nothing will leak)!

please hold the dip tube (straw like portion) in one hand, just below where the pump sticks out from under the threaded cap, and place your other hand on the top of the pump (that dispenses product).
twist the hand on the top portion of the pump (where product dispenses) away from you, and the hand on the dip tube/just under the threaded portion of the lid towards you.

if you are a platinum blonde:

to maintain tone, use bust your brass shampoo + conditioner every other wash.
we suggest alternating bust your brass shampoo + conditioner with the kure shampoo + conditioner and multi-task repair treatment.
use bust your brass repair mask 1x per week in place of conditioner.
if you notice pesky brassiness pop up, use the bust your brass system every wash until desired tone is reached.
keep track of your tone: if you're loving your tone, keep up your routine as is. if you notice brassiness peeking in, increase use the bust your brass mask an additional time per week. if you are a little too cool-toned and nearing a violet tone, cut back on the bust your brass routine for a week or two.

if you have highlights, a balayage, or natural-looking (color-treated) blonde hair:

use bust your brass shampoo + conditioner every other wash.
assess hair's tone and pivot (increase or decrease usage) as needed.
those with naturally dark hair should use the bust your brass intense repair mask 1x per week in place of conditioner.
please note: naturally darker or brunette hair will fight to return to natural hair color; in this case, increase the usage of system.

if you have gray hair:

use bust your brass shampoo + mask every wash or alternate every other wash with the kure collection.

if you are a textured blonde:

follow the regimen suggested above based on type of blonde, but use the bust your brass repair mask in place of conditioner for an extra dose of moisture. the bust your brass repair mask is the perfect mix of toning, moisture, and repair which is just what a textured blonde needs."

please hold the dip tube (straw like portion) in one hand, just below where the pump sticks out from under the threaded cap, and place your other hand on the top of the pump (that dispenses product).
twist the hand on the top portion of the pump (where product dispenses) away from you, and the hand on the dip tube/just under the threaded portion of the lid towards you.

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.
vegan proteins: derived from quinoa + provide keratin-like benefits.
plant butters: vitamin-rich mango butter, shea butter + borage oil.
ultra-violet pigments: counteract yellow + brassy tones to bring out the best shades of blonde, silver + gray.

full ingredients

Water/Aqua/Eau, Myristyl Alcohol, Propylene Glycol, Cetearyl Alcohol, Cetrimonium Chloride*, Hippophae Rhamnoides (Sea Buckthorn/Argousier) Fruit/Seed Oil, Borago Officinalis (Borage/Bourrache) Seed Oil, Mangifera Indica (Mango/Mangue) Seed Butter, Butyrospermum Parkii (Shea/Karite) Butter, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Aloe Barbadensis Leaf Juice, Glycerin, Hydrolyzed Quinoa, Aminomethyl Propanol, Bis-PCA Dimethicone, Butylene Glycol, C11-15 Pareth-7, C12-16 Pareth-9, Caprylyl Glycol, Decyl Oleate, Disodium PEG-12 Dimethicone Sulfosuccinate, Trideceth-12, Trimethylsiloxyamodimethicone, Citric Acid, Etidronic Acid, Lauryl Alcohol, Hydrogenated Palm Glycerides Citrate, Phenoxyethanol, Potassium Sorbate, Sodium Benzoate, Cetyl Alcohol, Benzyl Alcohol, Tocopherol, Fragrance/Parfum, Hydroxycitronellal, Limonene, Ext. Violet 2 (CI 60730) *antistatic agent/agent antistatique

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.

clinically tested results

bust your brass cool blonde strength repair conditioner 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 + conditioner are used as a system.

how to use?

bust your brass routines by blonde type infographic

1. massage conditioner from mid-lengths to ends.
2. leave on for 2-3 minutes.
3. rinse thoroughly.

liter pumps how-to:
the pumps will need to be opened/unlocked prior to putting them in your liter-sized bottles -- these pumps have a tight lock on them (so that you can re-lock if needed for travel or storage, and be assured nothing will leak)!

please hold the dip tube (straw like portion) in one hand, just below where the pump sticks out from under the threaded cap, and place your other hand on the top of the pump (that dispenses product).
twist the hand on the top portion of the pump (where product dispenses) away from you, and the hand on the dip tube/just under the threaded portion of the lid towards you.

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.
vegan proteins: derived from quinoa + provide keratin-like benefits.
plant butters: vitamin-rich mango butter, shea butter + borage oil.
ultra-violet pigments: counteract yellow + brassy tones to bring out the best shades of blonde, silver + gray.

full ingredients

learn more about our ingredients here

key ingredients

bond fortifying technology: helps target + strengthen the bonds in hair most prone to breakage due to environmental stressors, heat, chemical treatments + more.
vegan proteins: derived from quinoa + provide keratin-like benefits.
plant butters: vitamin-rich mango butter, shea butter + borage oil.
ultra-violet pigments: counteract yellow + brassy tones to bring out the best shades of blonde, silver + gray.

full ingredients

learn more about our ingredients here

sustainability + impact

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.

Customer Reviews (5.0 / 5 · 7 reviews)

Jacob G. ★★★★★ Aug 13, 2026

My hair feels noticeably thicker after just three washes, and the repair side of this conditioner is no joke. The violet tone does its job without leaving any purple streaks, even on my light platinum sections. It's become a staple in my shower routine.

Ellie ★★★★★ Aug 12, 2026

The violet tint actually neutralizes the brass without leaving any purple cast, and my blonde looks brighter after just two washes. Even better, my hair feels softer and less tangled in the shower, which is a win for a conditioner that also tones.

Henry ★★★★★ Aug 11, 2026

My hair feels noticeably thicker after just two washes, and the violet tone keeps my highlights looking fresh without that purple-tinged dullness. It's not heavy like some conditioners, which is a win since my fine strands get weighed down easily.