Olaplex Nº.4P Purple Toning Shampoo 250 mL — Blonde Enhancer, Bond-Repairing & Hydrating

Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo is an ultra-concentrated purple cleanser that tones brassy yellow tones while strengthening and hydrating hair from roots to ends.

Formulated by the original bond-building laboratory, this 250 mL purple shampoo blends Olaplex’s patented active chemistry with color-correcting pigments to target unwanted warmth in blonde, gray, highlighted, or lightened hair. It cleanses gently while working on a molecular level to help repair broken bonds, reduce breakage and improve manageability so hair looks brighter, softer and healthier without stripping moisture.

How does Nº.4P neutralize brassiness without drying out hair?

Nº.4P deposits violet pigments that counteract yellow and orange tones as it cleanses, while Olaplex’s bond-building ingredients protect and reinforce the hair structure. The formula is ultra-concentrated, so you use less product to achieve effective toning with less water loss than harsher clarifying shampoos.

• Violet pigments neutralize warm undertones for cooler-looking blonde or gray shades.
• Bond-building chemistry helps reduce breakage and strengthens weakened strands.
• Hydrating surfactants cleanse without stripping natural oils or color.
• Concentrated formula means shorter rinse times and lower product usage.

How often should I use this purple shampoo to maintain tone?

Frequency depends on your hair’s porosity, base color and how quickly brassiness appears; most users start with once or twice weekly and adjust. For heavily porous or very warm hair, you may use it twice weekly until the desired tone is reached, then reduce to maintain.

• Once weekly for subtle maintenance on lightly brassy hair.
• Two times weekly for stronger toning on porous or warm hair.
• Alternate with a regular nourishing shampoo to avoid over-toning.
• Leave on briefly to control intensity; longer application increases pigment deposit.

Will Nº.4P work on all hair types and color-treated hair?

Yes—this formula is effective on coily, curly, straight and wavy textures as well as on natural, highlighted or color-treated blondes and grays. Its bond-repairing technology is designed to strengthen hair regardless of texture while the purple pigments specifically target warmth in lightened shades.

• Safe and effective on natural and color-treated blondes and grays.
• Compatible with textured hair: coily, curly, wavy and straight.
• Helps reduce breakage from mechanical and chemical damage.
• 250 mL size fits at-home routine or travel grooming needs.

How do I use Nº.4P to get the best results?

Apply to wet hair, lather from roots to ends and leave on for a short period based on desired toning—then rinse thoroughly. For deeper toning, leave on a little longer, but monitor closely to avoid over-depositing purple pigment; follow with a conditioner or Olaplex Nº.5 for added moisture and repair.

• Wet hair thoroughly before applying a small amount evenly through hair.
• Lather and leave on for 1–5 minutes depending on toning needs.
• Rinse well and follow with a moisturizing conditioner.
• Adjust frequency and leave time based on porosity and desired tone.

Who is this for: Olaplex Nº.4P is for anyone with blonde, highlighted, silver or lightened hair who wants to neutralize brassiness while improving strength and hydration. It suits people with all textures—curly, coily, wavy and straight—who prefer a concentrated, salon-grade purple shampoo that supports bond repair and reduces breakage as part of an at-home color maintenance routine.

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)