Olaplex N°.4P Blonde Enhancer Purple Shampoo 250 mL — toning, hydrating & bond-building

Olaplex Nº.4P Blonde Enhancer Purple Shampoo is an ultra-concentrated purple shampoo that tones brassiness while cleansing and helping hydrate hair from roots to ends.

Designed for blondes, grays, and highlighted hair, this 250 mL formula blends Olaplex's bond-building technology with violet pigments to reduce yellowing and improve manageability. It works on both natural and color-treated hair to deliver a brighter, softer appearance without overly stripping moisture. Use it as part of a regular regime to maintain cooler tones between salon visits.

How does Nº.4P reduce brassy or yellow tones?

Violet pigments in the shampoo counteract warm undertones by depositing subtle cool tones during washing. The result is a neutralized, cleaner-looking blonde or gray without heavy buildup, so hair appears clarified and refreshed after rinsing.

• Purple pigments neutralize yellow and orange cast.
• Rinses out cleanly to avoid residue or dulling.
• Works on natural, highlighted, and color-treated blondes.
• Helps extend salon toning between appointments.

Will this shampoo make my hair dry or brittle?

Nº.4P is formulated to cleanse while helping retain hydration rather than stripping oils aggressively. Olaplex's active bond-supporting chemistry supports hair integrity, reducing the feeling of dryness and minimizing breakage over time when used as directed.

• Ultra-concentrated formula means you use less product per wash.
• Hydrating agents balance cleansing to maintain softness.
• Bond-building technology helps reduce breakage from mechanical stress.
• Suitable for frequent use when needed for toning maintenance.

How often should I use Olaplex Nº.4P to maintain tone?

Frequency depends on your hair’s porosity and how quickly brassiness returns; many users apply it 1–3 times per week. If your hair is particularly warm-toned or you have high-porosity color-treated hair, increase use until desired tone is reached, then move to maintenance washes.

• 1–3 times weekly is a typical starting point.
• Use more frequently for stubborn brassiness or porous hair.
• Alternate with a regular Olaplex cleansing shampoo if daily washing is needed.
• Adjust based on color longevity and personal preference.

How do I get the best results from this purple shampoo?

Apply to wet hair, lather through roots to ends, and leave on for 1–5 minutes depending on desired toning intensity. Rinse thoroughly and follow with a conditioner or a bond-supporting mask for added softness and strength.

• Wet hair thoroughly before applying for even pigment distribution.
• Shorter leave times for subtle toning; longer for stronger effects.
• Rinse well to prevent lingering purple tint.
• Follow with conditioner or treatment to restore moisture and smooth the cuticle.

Who is this for: Olaplex Nº.4P is for anyone seeking to neutralize yellow or brassy tones in blonde, gray, or highlighted hair while supporting strand strength. It's appropriate for natural and color-treated hair types that need both toning and gentle care—ideal for people who want brighter, softer-looking hair between salon visits without a heavy, drying formula. The 250 mL size offers a concentrated option for regular toning maintenance.

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)