OLAPLEX Nº.4P Blonde Enhancer Toning Shampoo | Brighten + Neutralise Brass

Olaplex
A concentrated purple toning shampoo that neutralises yellow and brassy tones in blonde, lightened and grey hair while delivering OLAPLEX bond-building repair at the cleanse step.
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Regular price $49.00
Regular price Sale price $49.00
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Complete the Routine

The Moda Take

A concentrated purple toning shampoo that neutralises unwanted yellow and brassy tones in blonde, lightened and grey hair while delivering OLAPLEX bond-care at the cleanse step.

The Moda Team Review

Nº.4P is OLAPLEX's purple shampoo — a toning cleanser for blonde, highlighted, balayage and grey hair that wants to stay cool, bright and brass-free between appointments. The highly concentrated purple pigments neutralise yellow tones on contact, and the OLAPLEX Bond Building Technology continues to repair and strengthen lightened hair during the same cleanse step. Most purple shampoos tone or condition. Nº.4P tones, cleanses and repairs simultaneously. The formula is concentrated enough that 1–2 times per week is the recommended frequency, alternated with Nº.4 on other wash days to avoid over-toning.

Why Moda Carries This

OLAPLEX is the bond repair system our clients ask for by name. Nº.4P is the most requested product from our blonde clients after Nº.3 — it is what keeps the tone between appointments without requiring an in-salon toner, and it handles repair at the same time.

Key Ingredients

  • Highly Concentrated Purple Pigments: Neutralise yellow and brassy tones through colour theory — violet cancels yellow.
  • OLAPLEX Bond Building Technology: Toning and strength support in a single cleanse step.

Moda Pro Tip

The longer Nº.4P sits on the hair, the more violet it deposits. Start with 30 seconds on first use to gauge how quickly your blonde picks up tone — fine or porous hair grabs colour faster. Work up from there. If the blonde goes grey-blue, shorten the time and alternate more frequently with Nº.4.

How To Use

  1. Apply to wet hair 1–2 times per week or as needed.
  2. Lather and leave on for 30 seconds to 2 minutes depending on desired tone.
  3. Rinse thoroughly and follow with Nº.5 or Nº.5P conditioner.
  4. Alternate with Nº.4 Bond Maintenance Shampoo on non-toning wash days.
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COMMON QUESTIONS

Good to Know

Yes — daily use of any concentrated purple shampoo can deposit too much pigment and shift blonde hair ashy or grey. Use Nº.4P 1–2 times per week and alternate with Nº.4 on other wash days. That's the Moda-recommended protocol for maintaining tone without over-toning.
Yes — Nº.4P's highly concentrated purple pigment formula is one of the more effective at-home toning shampoos available. Used consistently 1–2x per week, it significantly extends time between toning appointments. Pairing it with Nº.5P conditioner gives you toning at both steps for better coverage.
Yes — Nº.4P works on any lightened or bleached sections, whether they're highlights, balayage, full bleach, or grey. It deposits neutralising purple pigment wherever the hair is porous and light enough to absorb it.
No — Nº.4P is not specifically formulated for fine hair volume, but it doesn't have a heavy texture. For fine blonde hair where volume is a primary concern, alternating Nº.4P with Nº.4 FINE gives you toning on some wash days and volume support on others.
Yes — the longer it sits, the more pigment deposits. For light brass or as maintenance toning: 2–3 minutes. For more noticeable brass or cooler tone goals: 5–10 minutes. For very warm or orange-toned hair: work up to 15 minutes. Rinse and assess — build time gradually.
SALON NOTE

Not Sure If This Is The One?

Professional hair care can be personal. If you're unsure whether this product is right for your hair type, goals, or routine, our team is happy to help you choose with real salon experience behind the recommendation.
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