Davines OI Shampoo and Conditioner 1L Pro Duo | Professional Roucou Oil System for Shine and Softness

Davines OI Shampoo and Conditioner 1L Pro Duo

The professional-size OI Roucou Oil system — OI Shampoo and OI Conditioner in 1000ml backbar format — the complete OI cleanse and condition routine for committed OI users at the best cost per wash, with optional pump dispensers.

The Moda Team Review: The OI Routine at Professional Scale

For clients who have committed to the OI routine and wash their hair three or more times per week, the 1L Pro Duo is the version that makes the most financial sense. The formula is identical to the retail sizes — same Roucou Oil concentration, same performance, same result — and the cost per wash drops significantly compared to restocking smaller bottles repeatedly. One pump of each product is the correct amount for most hair types, and the optional pump dispensers make over-pouring impossible and dosing effortless.

The Roucou Oil deposit builds cumulatively with every wash — clients using OI consistently at this volume consistently report a significant shift in baseline hair quality over four to six weeks that goes well beyond what they experienced in the first few washes. The 1L format is how that cumulative result gets maintained without interruption.

What's Included

• Davines OI Shampoo (1000ml) — Sulfate-free Roucou Oil shampoo for all hair types. Gently cleanses while depositing the first layer of Roucou Oil softness and antioxidant protection. Builds the shine and softness foundation that every subsequent OI product enhances. Vegan.
• Davines OI Conditioner (1000ml) — Roucou Oil conditioner for softness, shine and frizz control. 3–5 minutes. Always rinse with cool water to seal the cuticle and lock the Roucou Oil in for maximum shine. Vegan.

How To Use

1. Apply OI Shampoo to scalp and roots — massage gently and allow lather to rinse through lengths.
2. Rinse completely then apply OI Conditioner from mid-lengths to ends.
3. Leave conditioner for 3–5 minutes.
4. Rinse with cool water to seal the cuticle.
5. Follow with OI All In One Milk or OI Oil on towel-dried hair for the complete routine.

Moda Pro Tip

Always add the pump dispensers — at 1000ml, even small variations in pouring add up to significant product waste over a month of use. One pump of shampoo and one pump of conditioner is the correct dose for most hair types. The pumps pay for themselves within the first few weeks.

Frequently Asked Questions

What is included in the Davines OI 1L Pro Duo from Moda Salon?
Yes — OI Shampoo and OI Conditioner in 1000ml professional sizes, with the option to add pump dispensers at checkout. The formula is identical to the retail sizes — same Roucou Oil, same performance, better cost per wash.

Do pump dispensers come with the Davines OI 1L Pro Duo?
No — pump dispensers are available separately and are compatible with standard Davines 1000ml bottles. We strongly recommend adding them — they make dosing consistent and significantly reduce product waste over the life of the bottles.

How long does the Davines OI 1L Pro Duo last with daily use?
Yes — at one pump per wash on medium-length hair, 1000ml of each product lasts approximately 3–4 months with daily use. The cost per wash is significantly lower than restocking retail sizes.

Is the formula in the Davines OI 1L Pro Duo the same as the retail sizes?
Yes — exactly the same formula. No difference in Roucou Oil concentration or performance between professional and retail sizes.

Is the Davines OI 1L Pro Duo suitable for colour-treated hair?
Yes — both OI products are colour-safe. Follow with OI All In One Milk before blow-drying and OI Oil as a finishing step for the complete Roucou Oil routine.