OLAPLEX Nº.4P Blonde Enhancer Toning Shampoo vs. Nº.4Curl Bond Shaper Hydrating Curl Shampoo: Key Differences for Color-Treated Curls

Choosing the right shampoo is essential for maintaining healthy, vibrant hair, especially when you have specific needs like toning brassiness or defining curls. OLAPLEX offers two standout formulas—Nº.4P Blonde Enhancer Toning Shampoo and Nº.4Curl Bond Shaper Hydrating Curl Shampoo—each designed to address different hair concerns while strengthening bonds. In this comparison, we break down their key differences, benefits, and which one suits your hair type and routine best.

Whether you are a blonde looking to neutralize unwanted yellow tones or someone with curly hair seeking deep hydration and curl definition, understanding the unique properties of each shampoo will help you make an informed choice. Both products are powered by OLAPLEX’s patented bond-building technology, ensuring that your hair remains strong and resilient with every wash.

What Sets Nº.4P Blonde Enhancer Toning Shampoo Apart?

Nº.4P Blonde Enhancer Toning Shampoo is specifically formulated for blonde, silver, or highlighted hair. Its violet pigments work to neutralize brassy and yellow undertones, leaving your color looking fresh and cool-toned. Unlike many toning shampoos that can be drying, Nº.4P is sulfate-free and infused with OLAPLEX’s bond-building technology, so it cleanses gently while strengthening the hair from within.

This shampoo is ideal for anyone who wants to maintain their blonde or gray color between salon visits. It helps extend the life of your color treatment while keeping hair soft, shiny, and less prone to breakage. If you have color-treated hair that tends to turn brassy, this is a must-have addition to your wash day routine.

• Contains violet pigments to cancel brassy and yellow tones
• Sulfate-free and gentle enough for daily or weekly use
• Strengthens hair bonds to reduce damage from color processing

How Does Nº.4Curl Bond Shaper Hydrating Curl Shampoo Differ?

Nº.4Curl Bond Shaper Hydrating Curl Shampoo is designed specifically for wavy, curly, and coily hair types. Its primary focus is on delivering intense moisture and enhancing natural curl patterns without stripping the hair of its essential oils. The formula includes shea butter and coconut oil to nourish and define curls, while OLAPLEX’s bond-building technology repairs and strengthens the hair shaft.

Unlike the toning shampoo, this product does not contain color-correcting pigments. Instead, it is formulated to reduce frizz, improve elasticity, and provide lasting hydration. It works beautifully for those with natural curls or chemically textured hair, helping to maintain definition and softness wash after wash.

• Enriched with shea butter and coconut oil for deep hydration
• Enhances curl definition and reduces frizz
• Sulfate-free and safe for color-treated or chemically processed curls

Key Differences at a Glance

To help you decide which shampoo fits your needs, here is a quick comparison of their primary features and benefits. Both products share the same bond-strengthening foundation, but their targeted benefits cater to very different hair goals.

• Nº.4P: Violet pigments for toning blonde, silver, or highlighted hair; best for neutralizing brassiness
• Nº.4Curl: Hydrating formula for curly, coily, or wavy hair; focuses on moisture, definition, and frizz control
• Both: Sulfate-free, color-safe, and contain OLAPLEX bond-building technology

Which Shampoo Should You Choose?

Your choice depends on your hair type and primary concern. If you have blonde or silver hair and struggle with brassiness, Nº.4P Blonde Enhancer Toning Shampoo is the clear winner. It will keep your color looking salon-fresh while strengthening your strands. For those with natural curls or waves seeking hydration and definition, Nº.4Curl Bond Shaper Hydrating Curl Shampoo is your best bet.

If you have both blonde curls and want to address brassiness and curl definition, you can alternate between the two shampoos. Use Nº.4P once or twice a week to tone, and Nº.4Curl on other wash days to maintain moisture and curl health. For added nourishment, pair your shampoo with the Weightless Nourishing Mask for a deep conditioning boost that works for all hair types.

• Blonde or silver hair with brassiness? Choose Nº.4P Blonde Enhancer Toning Shampoo
• Curly, coily, or wavy hair needing hydration? Choose Nº.4Curl Bond Shaper Hydrating Curl Shampoo
• Both? Alternate between them for the best of both worlds

Both OLAPLEX Nº.4P Blonde Enhancer Toning Shampoo and Nº.4Curl Bond Shaper Hydrating Curl Shampoo are excellent choices for maintaining healthy, strong hair. Whether you are toning your blonde or hydrating your curls, you can trust OLAPLEX to protect and strengthen your hair with every wash. Explore the full range, including the Blonde Enhancer Set, to build the perfect routine for your unique hair needs.