1 item added to your basket Could not add to basket, we currently only have 1 of this item in stock

Do you dream of having enviable blonde, or maybe you want to embrace your grey? Perhaps you’re a brunette with highlights and just want to brighten up your hair. Well, the Olaplex system has just added a splash of purple into their mix with the No.4P Blonde Enhancer Toning Shampoo.

We’re going to reveal everything from its strengthening formula right through to how it seamlessly fits with the rest of the Olaplex system, so you’ll see why we believe this brass-busting shampoo will be the one-stop solution for all your blonde haircare concerns.

What makes Olaplex different?

You might have heard Olaplex called “the gold standard in hair repair”, but it’s the science that’s packed inside that has made the brand the global success that it is. We’re not exaggerating when we say the solution to all your haircare troubles is thanks to a single molecule: Bis-Aminopropyl Diglycol Dimaleate. Free of oils and silicones, it relinks broken bonds found deep within your hair and reverses the effects of the five forms of damage:


  • Colour
  • Chemical
  • Mechanical
  • Environmental
  • Lifestyle

Suitable for every hair type and texture, from fine to coiled, the Olaplex system really does transform your hair into the best version of itself.

So what exactly is Olaplex No.4P?

We’ve all had those days when we feel as though we’ve subjected our hair to so much wear and tear that it’s left our colour looking dull and brassy. That’s where the Olaplex No.4P Blonde Enhancer Toning Shampoo comes in. More than just a regular purple shampoo, you’ll feel your hair’s moisture and strength return in an instant. You’re probably wondering how it’s possible. Well, its 100% sulphate-free formula combines the power of Olaplex’s patented bond-building technology with a highly concentrated violet pigment, along with a gentle cleansing action.

This combination neutralises those unwanted brassy tones while also providing one more crucial element for healthier hair: hydration. In fact, the Olaplex No.4P Blonde Enhancer Toning Shampoo is one of the only purple shampoos specially designed to hydrate your hair, leaving it feeling silky smooth and soft to the touch. With a guarantee to produce three times brighter results than leading purple shampoos on the market, it’s also gentle enough to use every day.

How do I use Olaplex No.4P?

One of the most exciting things about the Olaplex No.4P Blonde Enhancer Toning Shampoo is that it’s fully customisable! No matter whether you’re a natural blonde or a highlighted brunette, you can decide how much and how often you use it until you achieve your desired result. Whatever you routine, all it takes are two simple steps to transform your hair and help your colour look and feel as good as new:


  1. Massage the Olaplex No4.P Blonde Enhancer Toning Shampoo into your hair until it creates a rich foam. Leave it to process for one to three minutes. For a more intense toning, leave to process up to five minutes.
  2. Rinse out, condition and style as required. TOP TIP: If you want to tone your colour without any risk of leaving a pigment deposit, use the Olaplex No.4P Blonde Enhancer Toning Shampoo every third wash and leave it in for a maximum of three minutes.

Where does No.4P sit with the rest of the Olaplex series?

The beauty of the No.4P Blonde Enhancer Toning Shampoo is that you can mix and match it with the whole range, just like you do with the current selection. To get the luscious locks you’ve always desired, there’s even a way to use both of the shampoos together, as you’ll soon discover. If you want to go all out Olaplex, read our step-by-step guide below.

Step One

Saturate dry hair with the Olaplex No.0 Intense Bond Building Treatment, leaving it in for ten minutes, but do not rinse out. Follow up immediately with the Olaplex No.3 Hair Perfector, again leaving in for ten minutes but this time rinsing out.

Step Two

Massage the Olaplex No.4P Blonde Enhancer Toning Shampoo from roots to ends until it creates a rich foam, and leave in for three minutes. For a more intense toning, leave in for five minutes. Rinse out thoroughly.

Massage the Olaplex No.4P Blonde Enhancer Toning Shampoo from roots to ends until it creates a rich foam, and leave in for three minutes. For a more intense toning, leave in for five minutes. Rinse out thoroughly. TOP TIP: If your hair has product build-up, you can cleanse your hair using the Olaplex No.4 Bond Maintenance Shampoo before using the Olaplex No.4P.

Step Three

Apply the Olaplex No.5 Bond Maintenance Conditioner from mid-lengths to ends. Rinse out thoroughly and move on to the Olaplex No.8 Bond Building Moisture Mask. Leave in for ten minutes and again rinse out.

Step Four

Apply a small amount of the Olaplex No.6 Bond Smoother and No.7 Bonding Oil onto damp or dry hair. Proceed to blow-dry and style your hair as desired.

Shop the perfect Olaplex products for your at-home routine

We told you it was a one-stop solution!

So you see, now that we’ve gone through everything there is to know about No.4P, from its formula to how you can combine it with the rest of the Olaplex system, let’s have a quick refresh about why the No.4P Blonde Enhancer Toning Shampoo is a brilliant addition to your haircare routine.

Tried, true and trusted

Olaplex’s patented technology is renowned worldwide and continues to be the industry innovator for bond-building haircare. The No.4P Blond Enhancer Toning Shampoo is yet another example of how you can get salon-quality results in the comfort of your own home.

Calm, cool and collected

No matter whether your hair is coiled and blonde or straight and grey, the No.4P Blonde Enhancer Toning Shampoo is suitable for all hair types and textures. Even though it is highly concentrated in active ingredients, its formula is gentle enough for you to use every day if you wish.Unbreakable Blondes

Unbreakable Blondes

The Olaplex No.4P Blonde Enhancer Toning Shampoo redefines brassy-reduction haircare, as it’s one of the few that also targets hydration. Whether you use it as a stand-alone treatment or as part of your at-home Olaplex routine, you can customise it to suit your haircare needs and desired results. After all, the more you use it, the brighter your blonde.

Shop the Olaplex No.4P Blonde Enhancer Toning Shampoo at For more advice and the latest hair and beauty tips, be inspired by our page to find out more.