FREE SHIPPING ON ALL ORDERS OVER $50*
Redken Acidic Bonding Concentrate Litre Duo
Returns & Exchanges
Thank you for shopping at Zennkai.com.
ONLINE EXCHANGE POLICY
You have 10 calendar days to return an item for EXCHANGE ONLY from the date you received it. As the purchaser you would be responsible for return shipping charges.
Final sale items are not eligible for exchange or store credit. Final Sale items include Litres, Litre Duos, Clearance, Last Chance, Hot Tools, Hair Accessories, Brushes, Combs, Nail Polishes, Nail Accessories, Hair Extensions, and Appliances.
To be eligible for a exchange:
- your item(s) must be either be unused or no more than a quarter of the volume missing.
- your item(s) must be in the original packaging.
- your item(s) need to have the receipt or proof of purchase.
STEP 1 - Complete the online return form in full. Incomplete forms will not be accepted: Click here to download a return form
STEP 2 - Ship your item(s) back to us. You are responsible for return shipping charges. Shipping costs are non-refundable.
STEP 3 - We will immediately notify you on the status of your exchange after inspecting your returned item(s)
STEP 4 - You can exchange your item(s) or receive an online shop credit in the form of an e-gift card
In the event that you cannot find a suitable exchange a merchandise credit for the same value of the product purchased will be issued to you in the form of a store credit. Store credits cannot be redeemed for cash or refunded. You will receive your e-gift card within 5 business days after the exchange is confirmed
RETURNING TO A ZENNKAI SALON LOCATION
Should you prefer to return your online purchases to a location near you, come visit us! Simply bring your items and proof of purchase to our salons, following our set out Exchange Policy.
Final sale items are not eligible for exchange or store credit. Final Sale items include Litres, Litre Duos, Clearance, Last Chance, Hot Tools, Hair Accessories, Brushes, Combs, Nail Polishes, Nail Accessories, Hair Extensions, and Appliances.
If you are not fully satisfied with your purchase we will EXCHANGE it within 10 days with proof of purchase. EXCHANGE OR STORE CREDIT ONLY, NO CASH REFUNDS.
Hair Tools & Appliances
Zennkai provides a 1 year warranty on electrical tools with a manufacturer defect. They can be exchanged within one year of original purchase date, with proof of purchase and in its original packaging/box.
All electrical tools may be returned for exchange only due to manufacturer defect, with proof of purchase and all original components. No exchanges will be given without proof of purchase. Items must be in the original box/packaging. In the event that you cannot find a suitable exchange a merchandise credit for the same value of the product purchased will be issued to you in the form of a store credit.
Hot Tools & Appliances are a FINAL SALE unless manufacturer defect and are not eligible for exchange or store credit.
Shipping
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are nonrefundable.
Contact Us
If you have any questions on how to return your item to us, contact us via email at zennkai@megahairfamily.com.
Corporate Office
310-5491 REGENT ST
BURNABY BC V5C 4H4
Email: zennkai@megahairfamily.com
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The Redken Acidic Bonding Concentrate Litre Duo is the professional-size bond repair shampoo and conditioner for damaged, bleached, and colour-treated hair — using citric acid technology to lower the hair's pH with every wash, seal the cuticle, rebuild broken bonds, and dramatically improve colour retention, in the 1-litre professional size at Zennkai's lowest Canadian price.
What's Included
• Redken Acidic Bonding Concentrate Shampoo — 1 litre (1000ml)
• Redken Acidic Bonding Concentrate Conditioner — 1 litre (1000ml)
Why Buy the Litre Size
• 35% savings vs buying two regular-size bottles of Redken's most in-demand bond repair system
• Bond repair is a daily maintenance routine — the litre size ensures you never run out mid-treatment
• Professional salon size used by colourists across Canada who recommend ABC to clients for between-appointment maintenance
• Not available at Sephora in litre size — Zennkai is one of the few authorized Canadian sources
• Lasts approximately 3–4 months with daily use — significantly better value for consistent bond repair
About Redken Acidic Bonding Concentrate
Redken Acidic Bonding Concentrate is the brand's answer to a universal problem: chemical services, bleach, and heat raise the hair's pH, force the cuticle open, and weaken the bonds inside the hair shaft. ABC uses a concentrated citric acid formula to correct this at the chemistry level — lowering pH with every wash, sealing the cuticle, and progressively rebuilding bond integrity. The result is measurably stronger, smoother hair with significantly improved colour retention compared to generic shampoos. It is now one of the most recommended professional shampoos by Canadian salon stylists for clients who colour or bleach regularly.
Key Ingredient
Citric acid technology — Redken's concentrated citric acid complex that lowers the hair's pH back to its optimal acidic level with every wash, sealing the cuticle, rebuilding bond structure, and preserving colour molecules. Sustainably-derived from citrus, it works cumulatively — the more consistently you use it, the stronger the bond repair effect.
Best For
• Damaged, bleached, or chemically processed hair
• Colour-treated hair that fades quickly between appointments
• Hair that feels rough, brittle, or breaks easily after chemical services
• Anyone transitioning to a bond repair routine recommended by their stylist
• Clients using Olaplex or K18 treatments who want a compatible bond-maintaining shampoo system
Available at Zennkai — Canada's lowest professional price on Redken Acidic Bonding Concentrate. Authorized Redken retailer. 100% authenticated professional stock. Free shipping on orders over $50. Ships anywhere in Canada. Shop the full Redken collection at zennkai.com/collections/redken.