Milbon Weekly Booster for Fine Hair — 4 x 0.3 fl oz kit, lightweight deep-conditioning vials

Milbon Smooth No. 4 Weekly Booster is a professional at-home deep-conditioning vial set formulated for fine hair to deliver immediate silkier, smoother texture after one use.

This four-vial kit is step 4 in Milbon's Signature Smooth regimen and is designed to be used once weekly in place of your regular conditioner. Each single-use vial contains a concentrated treatment that works with the Smooth homecare collection to help restore manageability, reduce surface roughness, and deliver a soft finish without weighing fine strands down. The formula is lightweight yet nourishing, combining silicones, silk-derived ingredients, squalane and hydrolyzed collagen to smooth cuticles and improve slip for easier detangling and styling.

How quickly will I notice differences in my hair?

Visible changes often appear immediately after the first treatment: hair feels softer and exhibits smoother surface texture. Continued weekly use for four weeks helps maintain the salon-grade results over time.

• Use one vial per week in place of conditioner.
• Leave on wet hair five minutes before rinsing.
• Immediate slip for easier combing and less breakage.
• Up to five weeks of improved texture when paired with Smooth homecare.

What makes this formula suitable for fine hair?

The booster is balanced to condition without heavy buildup—key for fine or limp hair types. Lightweight emollients and targeted proteins smooth the hair surface while minimizing excess weight so styles keep natural volume.

• Contains amodimethicone and dimethicone for surface smoothing.
• Squalane and hydrolyzed silk for soft conditioning without heaviness.
• Hydrolyzed collagen to support elasticity and manageability.
• Single-dose vials prevent overuse and product residue.

How do I use the weekly booster at home?

Replace your regular conditioner with one vial once per week for four consecutive weeks. After shampooing, apply to mid-lengths and ends, leave five minutes, then rinse thoroughly—no heat required.

• Shampoo hair and gently towel-dry excess water.
• Massage vial contents from mid-length to ends; avoid roots.
• Wait five minutes, then rinse completely.
• Use alongside Milbon Smooth shampoo and conditioner for best results.

Will this affect color-treated or chemically processed hair?

The formulation focuses on surface repair and conditioning; it's compatible with color- and chemically treated hair, helping improve texture and manageability without heavy buildup. Always perform a patch test if you have specific sensitivities.

• Safe for most color-treated hair types when used as directed.
• Helps smooth cuticles to improve shine and manageability.
• Contains gentle conditioning agents rather than harsh actives.
• Single-use vials limit prolonged exposure to product on the scalp.

Who is this for? Milbon Smooth No. 4 Weekly Booster is aimed at people with fine or thin hair who want salon-quality smoothness and easier styling at home. It's a good choice for anyone seeking a lightweight, concentrated weekly treatment to improve softness, reduce frizz, and maintain the results of professional smoothing services. Avoid using on oily scalps if you prefer root-volume retention—apply only to mid-lengths and ends.