Sebastian's leave-ins are easy to mix up because they all promise softer, healthier-looking hair. In fact they solve different problems. First work out what your hair actually does wrong. Does it feel dry, look dull, break when you brush it, or feel damaged from colour and heat? Then pick the matching leave-in.
Dry, frizzy hair that needs moisture: Potion 9
Potion 9 is Sebastian's classic leave-in styling treatment. It combines several benefits, including detangling, frizz control, shine, heat protection and flexible hold, and it suits every hair type. Use it on damp hair before styling, or smooth a little over dry ends. It comes in 50, 145 and 500 ml.
If you want the same idea in a lighter format, Potion 9 Super Luxe Styling Drops combine nine botanicals for moisture, shine and frizz control, with heat protection up to 230°C. Wash with Potion 9 Nourishing Shampoo and Nourishing Conditioner for the complete moisture routine.
Best for: dry hair of any texture, and anyone who wants one product that does several jobs.
Dull hair that needs shine and smoothness: Dark Oil
Choose from the Dark Oil family by how heavy your hair can take:
- Dark Oil: the original multi-tasking oil for intense shine, frizz control and nourishment. It protects against heat styling up to 230°C. Use it before styling or as a finishing touch.
- Dark Oil Lite: an ultra-light version for fine to medium hair. It adds shine and frizz control with very little weight.
- Dark Oil Silkening Mist: a light finishing mist to smooth flyaways and add a silky shine at the end of styling.
In the shower, Dark Oil Shampoo and Dark Oil Conditioner continue the shine without weighing hair down.
Best for: hair that is fine to manage but looks flat and lacks shine.
Hair that snaps: No.Breaker
If your hair breaks when you brush or style it, the problem is strength, not moisture. No.Breaker is a lightweight leave-in bond spray that targets breakage from heat, colour services and everyday wear. If you prefer a cream that also works as a styler, No Breaker Bonding & Styling Leave-In Cream combines bond care with styling and heat protection.
Best for: bleached, often heat-styled, or chemically treated hair that is breaking.
Damaged hair, treated overnight: Penetraitt Overnight Serum
Penetraitt Overnight Repair Serum is a leave-in you apply before bed. It smooths and conditions damaged, over-processed hair while you sleep, with nothing to rinse out in the morning. Use it with the Penetraitt Shampoo, the Penetraitt Conditioner and, once a week, the Penetraitt Mask.
Best for: brittle, coloured or chemically treated hair that needs more repair than a daytime leave-in can give.
Quick decision guide
- Dry and frizzy: Potion 9, or the Super Luxe Styling Drops
- Dull, needs shine: Dark Oil (Lite for fine hair)
- Breaking: No.Breaker spray, or the No Breaker cream
- Badly damaged: Penetraitt Overnight Repair Serum
- Heat styling every day: any of these, plus Trilliant heat protection
Your questions, answered
Can I use No.Breaker and Dark Oil together?
Yes. They do different jobs. Spray No.Breaker on damp hair first, then use a small amount of Dark Oil on the ends to finish.
Potion 9 or Dark Oil for frizz?
Potion 9 is the better choice when frizz comes from dryness, because it adds moisture and detangles. Dark Oil is better when the hair is healthy but rough on the surface and needs smoothing and shine.
Will the overnight serum mark my pillowcase?
Use only enough to coat the lengths, and keep it off the roots. The exact amount and directions are on the product page.
See every Sebastian leave-in and styler on the Sebastian Professional collection page.