If your hair has been feeling dry, dull, or just a bit lifeless lately — especially from heat styling, colour treatments, or environmental stress, Olaplex No.9 might be worth your attention.

What Is It:

Olaplex No.9 is a leave-in, silicone-free serum designed to protect your hair from daily damage. It claims to:

• Protect against pollution.

• Shield hair from heat (up to 450°F).

• Add shine and softness.

• Reduce static and frizz.

• Help with detangling and manageability.

Unlike the more intensive Olaplex treatments (like Olaplex No.3), No.9 is designed to be lightweight and used more frequently, more like a styling primer than a repair mask.

How To Use It:

After washing and towel-drying your hair, apply about 2 pumps of the serum mid-length to ends. It’s a gel-serum texture, not oily, and absorbs quickly without any residue. From there, either air-dry or use your blow dryer.

You can also layer it with Olaplex No.6 (the Bond Smoother) when you want extra control or moisture — they work really well together.

What You Will Notice:

• Less Frizz — Especially on humid days. Hair will feel smoother and more “put together.”

• Shinier Finish — Even when you air-dry, your hair will have a soft sheen.

• Better Heat Protection — Your ends won't get as dry after heat styling.

• No Heaviness/Stickiness — Which is a big win for fine to medium hair!
  

What It Doesn’t Do

It’s not a miracle product! It won’t replace a deep conditioner or reverse years of damage overnight. If your hair is extremely dry or over-processed, you’ll likely still need a more intensive repair treatment (like Olaplex No.3 or a deep mask).

But as a daily protectant and styling base, it’s genuinely useful.

Who It’s Best For:

• People who heat style regularly.

• Colour-treated or highlighted hair.

• City dwellers or anyone exposed to pollution.

• Those who want shine and softness without extra weight

If your hair tends to fall flat or get greasy easily, this is a great lightweight option that won’t weigh it down.