Amika
Bust Your Brass 1000ml Duo
Cool Blonde Shampoo + Conditioner
The blonde system. Litre size. Better value.
The complete Bust Your Brass blonde toning system in litre size — better value per wash for blondes on a consistent toning routine.
- Repair
- Blonde tone
- Brassiness
- Cleanse + Condition
B-Corp · Purple Toning · Bond Repair · 1000ml Duo · Blonde + Grey · Vegan
This is probably for you if…
- Regular BYB users upgrading to the best-value format
- Blondes on a 1-2x weekly toning schedule
- Those wanting shampoo + conditioner bundled at a better price
- Platinum or heavily bleached hair using BYB frequently
In stock + ready to ship
Unopened + unused items may be eligible for exchange or store credit within 14 days. Returns policy
- Free shipping $100+Canada + U.S. · duties included
- Packed by ModaBowmanville, Ontario
- Earn Inner CirclePoints on eligible orders
What it does
- Toning and bond repair through every step of the wash
- 1000ml — best value per wash for regular toning system users
- Available with or without pumps
- B-Corp certified — vegan, cruelty-free, recycled packaging
Perfect for
- Blonde
- Highlighted
- Balayage
- Grey
- Bleached hair
How to use
- Shampoo: Apply to wet hair 1-2x per week. Leave 1-5 minutes. Rinse.
- Conditioner: Apply mid-lengths to ends. Leave 2-3 minutes. Rinse.
- Add the BYB Mask weekly for deeper toning and repair.
Routine step
Why we like it
The Moda Team Review
Blondes who rely on Bust Your Brass regularly — and most of our blonde clients do — go through it quickly enough that the litre duo makes obvious financial sense. Same system, better value.
Read full stylist notes
The blonde client going through a 275ml of BYB shampoo every 5-6 weeks. The litre duo lasts significantly longer, costs meaningfully less per wash, and keeps the paired system they already rely on. Amika built Bust Your Brass as a system, not a single product. The 1000ml duo format serves the blondes who take that system seriously.
Moda
What’s inside — and why it’s there
The ingredients worth knowing.
- Purple Pigment + Bond Repair ComplexIdentical to the individual products. Toning and repair compounding through two steps every toning wash day.
View full ingredient list
Ultra-violet toning pigments help counter unwanted warmth. The Bust Your Brass repair routine is built for blonde maintenance, with bond-supporting care and sea buckthorn for softness and shine.
How to use
Use it the way we would.
- Shampoo: Apply to wet hair 1-2x per week. Leave 1-5 minutes. Rinse.
- Conditioner: Apply mid-lengths to ends. Leave 2-3 minutes. Rinse.
- Add the BYB Mask weekly for deeper toning and repair.
Moda stylist tipGet the pumps. Purple pigment shampoo in a litre bottle without a pump is genuinely messy in the shower. The pump variant or Liter Pump Set is worth it every time.
Reviews
Questions? We get them.
Good to know.
The questions we hear most about this product. If yours isn’t here, a real stylist will answer.
Ask ModaIs the 1000ml Bust Your Brass Duo the same formula?
Yes — identical formulas. Same purple toning pigment and bond repair actives. The 1000ml is a value format for consistent users.
How long does the 1000ml Bust Your Brass Duo last if I use it twice a week?
Yes — at 2 toning washes per week on medium-length hair, each 1000ml bottle typically lasts 6–9 months. Exact duration depends on hair length, density, and product applied per wash.
Should I try the standard sizes before buying the 1000ml?
Yes — if you haven't used Bust Your Brass before, start with the standard sizes to confirm the toning level is right for your hair before committing to a litre of each.
Do I still need to alternate with a non-toning shampoo if I buy the 1000ml?
Yes — alternating 1–2 toning washes per week with a non-toning shampoo is the recommended protocol regardless of bottle size. Daily use of toning shampoo risks over-depositing pigment.
Are pumps included with the 1000ml Bust Your Brass Duo?
No — pumps are available separately as the Amika Liter Pump Set. Adding pumps to any litre purchase is a practical choice — dispensing from litre bottles in the shower without pumps leads to over-pouring.
Returns
Unopened + unused products may be eligible for exchange or Moda store credit within 14 days.
Returns policy
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