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Deep & Renew Booster Oil

Sale price$34.00 USD
Free US shipping over $75

Targeted repair. Sealed protection. Lasting resilience.

The Deep & Renew Booster Oil is a concentrated, rinse-out repair treatment that intensifies your damage-repair ritual. Developed with advanced Japanese technology, this high-potency oil drives a high concentration of cuticle-repair actives — Moringa, Argan and Camellia oils with Vitamin E — deep into the fiber to rebuild severely damaged, dry, and over-processed hair.

Blend a few pumps into the Deep & Renew Treatment Mask to boost penetration and cuticle sealing, or use it on its own as an in-shower treatment — then rinse. Hair is left visibly stronger, smoother, and more resilient, with no heaviness or residue.

Best used 1–2 times per week, as part of an intensive repair cycle.

Why you’ll love it

  • Concentrated repair for damaged areas
  • Seals and protects the hair fiber
  • Enhances shine and smoothness
  • Reduces frizz and improves alignment
  • Rinses clean — no residue or weight

Sensorial experience

A silky oil that melts into wet hair and rinses away clean, leaving a refined softness and a subtle, elegant fragrance.

Best for

For severely damaged, porous, chemically treated, or heat-stressed hair in need of intensive, targeted repair.

How to use

Two ways to use — both rinse-out. 1) Mix 1–2 pumps into the Deep & Renew Treatment Mask, apply after shampooing, leave on for 2–3 minutes, then rinse. 2) On its own: after shampooing (and masking), apply a coin-sized amount to mid-lengths and ends, leave on for 2–3 minutes, then rinse. Use 1–2 times per week. Avoid letting water into the bottle.

Salon Technique: Pair with Treatment Mask

For enhanced repair, mix 1–2 pumps of the Booster Oil into the Deep & Renew Treatment Mask before applying.

This method improves absorption, seals the cuticle more effectively, and delivers a more intensive repair result.


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Stephen Knoll Deep & Renew Booster Oil, 80 ml bottle, front view
Deep & Renew Booster Oil Sale price$34.00 USD