Olaplex No.4CURL Bond Shaper Hydrating Curl Shampoo 33.8oz

Cleanse, strengthen, and deeply hydrate curls with Olaplex No.4CURL Bond Shaper Hydrating Curl Shampoo 33.8 oz, a professional salon size curl shampoo specially designed for curly, coily, and wavy hair textures. Powered by patented 3D Bond Shaper™ Technology and Hydra-Define Technology™, this sulfate free formula gently removes buildup while helping repair damaged curl bonds, reduce frizz, and improve softness and definition. 

Unlike harsh shampoos that can strip natural oils from textured hair, No.4CURL uses a gentle moisture balancing cleansing system that helps preserve hydration while refreshing the scalp and curls. The creamy rich lather removes dirt, product buildup, and excess oil without leaving curls dry, tangled, or rough. 

Specially formulated for naturally fragile textured hair, this shampoo helps strengthen weakened bonds caused by heat styling, coloring, environmental stress, and daily manipulation. Olaplex clinical testing reported 7 day curl hydration and 50% less frizz even in humid conditions after use with the matching No.5CURL Conditioner. 

The professional liter size is especially ideal for frequent curl maintenance, salon use, or households with multiple curl care users.

Key Benefits

• Gently cleanses curly, coily, and wavy hair
• Helps strengthen damaged curl bonds
• Deeply hydrates textured hair
• Enhances curl definition and softness
• Helps reduce frizz by 50%
• Supports healthier more manageable curls
• Sulfate free and silicone free formula
• Suitable for color treated and chemically processed hair
• Provides hydration for up to 7 days
• Professional salon size liter bottle

Why You’ll Love It

Unlike traditional shampoos that can leave curls dry or difficult to manage, Olaplex No.4CURL focuses on balancing deep hydration with bond repair and lightweight cleansing.

Beauty editors at Allure tested the shampoo across different curl patterns and praised how soft, hydrated, and defined curls felt after washing. Reviewers especially appreciated that the shampoo cleaned effectively while still maintaining bounce and moisture. 

Byrdie reviewers also noted that the shampoo improved softness and reduced frizz without flattening curls or leaving heavy buildup behind. The formula’s silicone free design was highlighted as especially beneficial for textured hair prone to dryness and product overload. 

Many users with damaged, bleached, or heat styled curls also appreciate the added bond repair support that helps restore healthier looking curl patterns over time.

Ingredients

Main ingredients include:

• 3D Bond Shaper™ Technology
• Hydra-Define Technology™
• Hydroxypropyltrimonium Hyaluronate
• Glycerin
• Avocado Oil
• Gentle Sulfate Free Cleansing Agents
• Brassicamidopropyl Dimethylamine
• Conditioning Curl Complexes
• Moisture Binding Ingredients 

These ingredients work together to strengthen damaged curl bonds, hydrate textured hair, reduce frizz, improve elasticity, and support healthier more defined curls.

How to Use

1. Apply onto wet hair and scalp
2. Massage gently to create a rich lather
3. Work through curls and scalp thoroughly
4. Rinse completely
5. Follow with No.5CURL Bond Shaper Hydrating Curl Conditioner
6. Use regularly as part of your curl care routine 

Who Is It Suitable For?

• Curly, coily, and wavy hair
• Dry and frizz prone curls
• Damaged or chemically treated textured hair
• Heat styled curls needing hydration
• Thick and coarse curl patterns
• Salon and frequent curl care users

Frequently Asked Questions

What does Olaplex No.4CURL Shampoo do?

It gently cleanses curls while hydrating, strengthening damaged bonds, reducing frizz, and improving curl definition and softness. 

Is it suitable for all curl types?

Yes, the formula is designed for wavy, curly, and coily hair across different textures and porosity levels.

Does it help with frizz?

Yes, Olaplex states the shampoo and conditioner system can reduce frizz by 50% even in humid conditions. 

Will it dry out curls?

No, the sulfate free formula is specifically designed to maintain hydration and softness while cleansing. 

Is it safe for color treated hair?

Yes, the shampoo is sulfate free, silicone free, vegan, and safe for chemically treated or color treated hair.