Olaplex Nº.4P Purple Toning Shampoo for Blonde — 250 mL, neutralizes brassiness & strengthens hair

Formulated with Olaplex’s patented bond-building chemistry, Nº.4P is designed to tone brassiness without over-drying. It works from roots to ends to refresh cool, neutralized blonde, silver and highlighted shades while providing hydration and helping to minimize breakage during cleansing. Safe for natural and color-treated hair textures — including coily, curly, wavy and straight — this 250 mL bottle delivers salon-grade toning with everyday usability.

How does Nº.4P remove brass and yellow tones?

Olaplex Nº.4P uses concentrated purple pigments to counteract warm yellow and brassy tones that appear in blonde, gray and highlighted hair. The purple molecules deposit a cool tint that neutralizes unwanted warmth while the formula cleanses gently.

• Ultra-concentrated purple color deposit for faster neutralizing.
• Balanced surfactants cleanse without stripping natural oils.
• Use as a periodic toning wash to maintain cool shades between color services.

Will this shampoo help reduce breakage and strengthen hair?

Nº.4P contains Olaplex’s active bond-building chemistry that addresses weakened bonds created by color, heat and styling. By working on a molecular level during the wash, it helps hair feel stronger and look healthier over time.

• Patented bond-repairing ingredients support internal hair structure.
• Hydrating agents help reduce friction and tangles that cause breakage.
• Regular use complements repair treatments for ongoing strength improvements.

How should I use it for best toning results without over‑purpleing?

Apply a small amount to wet hair and emulsify from roots to ends; leave on briefly if targeting stubborn brassiness, then rinse. Frequency depends on hair porosity and desired coolness — start with once weekly and adjust.

• For subtle toning: lather and rinse immediately.
• For stronger neutralizing: leave on 1–3 minutes, then rinse thoroughly.
• Follow with a moisturizing conditioner; consider mixing with regular shampoo for lighter toning.

Is Nº.4P suitable for all hair types and color processes?

Nº.4P is formulated to be effective on both natural and color-treated hair across textures — from fine and straight to coarse and coily. It targets brassiness in blonde, bleached, silver and highlighted hair while also being gentle enough for repeated use when needed.

• Safe for highlighted, balayage, bleached and gray hair tones.
• Appropriate for textured hair — coily, curly, wavy and straight.
• Works as a maintenance step between salon color appointments.

Who is this for: Olaplex Nº.4P is ideal for anyone looking to neutralize yellow or brassy tones in blonde, silver or highlighted hair while adding hydration and strengthening benefits. It suits salon clients and at-home users who want concentrated toning power without sacrificing hair health, including those with fragile, color-treated or textured hair seeking a reliable maintenance shampoo.

Ingredients

Water (Aqua/Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Glycerin, Sodium Cocoamphoacetate, Sodium Chloride, Acrylates Copolymer, Betaine, Phenoxyethanol, Fragrance (Parfum), Polyquaternium-7, Bis-Aminopropyl Diglycol Dimaleate, Guar Hydroxypropyltrimonium Chloride, Ethylhexylglycerin, Hexyl Cinnamal, Limonene, Citric Acid, Sodium Benzoate, Acid Violet 43 (Cl 60730)