Olaplex No.4P Blonde Enhancer Toning Shampoo Liter 33.8 oz

Keep blonde, silver, gray, and highlighted hair bright, cool toned, and healthy looking with Olaplex No.4P Blonde Enhancer Toning Shampoo Liter (33.8 oz), a professional size purple shampoo designed to neutralise unwanted yellow and brassy tones while strengthening and hydrating the hair. Powered by patented OLAPLEX Bond Building Technology™, this ultra concentrated toning shampoo helps repair damaged hair bonds while visibly enhancing brightness and shine after just one use. 

Unlike many purple shampoos that can leave hair dry or over toned, Olaplex No.4P combines intense violet pigments with bond repairing technology to tone and strengthen at the same time. The sulfate free formula gently cleanses while helping soften the hair and improve manageability without stripping moisture.

Specially formulated for blonde, lightened, gray, and chemically treated hair, the highly pigmented formula helps counteract brassiness caused by fading, heat styling, hard water, and environmental exposure. Many users report brighter cooler toned hair with improved softness and shine after only one wash.

Key Benefits

• Neutralises yellow and brassy tones
• Brightens blonde, gray, and highlighted hair
• Strengthens and repairs damaged hair bonds
• Helps soften and smooth the hair
• Highly concentrated purple toning formula
• Sulfate free and color safe shampoo
• Suitable for chemically treated hair
• Helps improve shine and manageability
• Hydrates while cleansing
• Professional salon size liter bottle

Why You’ll Love It

Unlike traditional purple shampoos that may leave hair feeling rough or overly purple tinted, Olaplex No.4P focuses on balancing toning with hydration and repair support.

Beauty editors at Byrdie described it as effective enough to “remove brassiness” while still leaving the hair softer and healthier looking. Reviewers especially praised the shampoo for helping maintain salon fresh blonde tones between appointments without excessive dryness.

Many users with bleached or highlighted hair also appreciate that the formula helps improve hair texture and strength while toning, making it especially useful for damaged blonde hair needing repair support.

Ingredients

Main ingredients include:

• Bis-Aminopropyl Diglycol Dimaleate (OLAPLEX Bond Building Technology™)
• Violet Pigments
• Glycerin
• Conditioning Agents
• Hydrating Cleansing Complex
• Strengthening Hair Care Polymers
• Antioxidant Hair Conditioning Ingredients

These ingredients work together to tone brassiness, repair damaged hair bonds, strengthen strands, and maintain softness and shine.

How to Use

1. Apply evenly onto wet hair
2. Massage gently into the scalp and lengths
3. Leave on for 1 to 3 minutes for regular toning
4. For stronger toning results, leave on for up to 5 minutes
5. Rinse thoroughly
6. Follow with conditioner or a hydrating hair mask
7. Use weekly or as needed depending on brassiness level

Who Is It Suitable For?

• Blonde and highlighted hair
• Gray and silver hair
• Bleached and chemically treated hair
• Hair with yellow or brassy tones
• Straight, wavy, curly, and coily hair
• People wanting salon fresh cool toned blonde hair

Frequently Asked Questions

What does Olaplex No.4P Blonde Enhancer Shampoo do?

It helps neutralise unwanted yellow and brassy tones while strengthening, hydrating, and brightening blonde, gray, and lightened hair.

Is it suitable for gray hair?

Yes, the purple pigments help brighten gray and silver hair while reducing yellow discoloration.

Will it dry out the hair?

Unlike many purple shampoos, the formula is designed to hydrate and soften while toning the hair.

How often should it be used?

Most users apply it weekly or whenever brassiness begins to appear, depending on hair tone and desired brightness.

Is it safe for color treated hair?

Yes, the formula is sulfate free, color safe, vegan, and suitable for chemically treated hair.