Olaplex No.4 Bond Maintenance Shampoo — 3.3 oz

Olaplex Nº4 Bond Maintenance Shampoo is a concentrated, high-lather formula designed to strengthen and hydrate hair while cleansing — including color-treated strands. It leverages Olaplex's bond-building technology to repair damaged hair and protect color-treated fibers from daily stressors like heat styling and environmental exposure.

When used as part of the No.3, No.4, No.5 system, results can include smoother detangling and noticeably reduced breakage. Clinical results reported by Olaplex show up to 90% smoother, better conditioned hair and a ~49% reduction in breakage when the system is used together as directed.

What makes this shampoo different

• Bond-strengthening chemistry that cleanses without stripping moisture, helping to preserve and repair internal hair bonds as you wash.
• Color-safe, sulfate-free formula suitable for color-treated hair and all hair types, including straight, wavy, curly, and coily textures.
• High-concentration, long-lasting shampoo that delivers strong cleansing and conditioning benefits from a small amount per wash.

OLAPLEX confirms that Nº4 is sulfate-free and color-safe, and is designed for daily use or as often as you wash your hair.

Who will love it

• Color-treated or chemically treated hair seeking to preserve vibrancy while improving manageability.
• Hair that experiences breakage, dullness, or stiffness from heat styling or environmental stressors.
• All hair types in need of a gentle cleanse that also nourishes and detangles.

In Olaplex’s own guidance, the shampoo is suitable for daily use and for curly hair, offering a balance of cleansing and conditioning without weighing hair down.

How to use

1. Dispense a coin-sized amount onto wet hair.
2. Massage into a rich lather, focusing on mid-lengths to ends, then rinse thoroughly.
3. Follow with No.5 Bond Maintenance Conditioner for best results.

Follow-up guidance from OLAPLEX emphasizes that this shampoo is part of a system and can be used daily or as needed, with a dime-sized amount as a starting point since the formula is highly concentrated.

Practical tips and true-outcomes

• Pair this shampoo with No.5 for a complete repair-and-moisture routine that leaves hair softer, shinier, and more manageable after every wash.
• If your hair is particularly dry or damaged, use the system consistently for several washes to experience cumulative bond-repair benefits.
• For color maintenance enthusiasts, using a bond-maintenance system can help extend color by preserving cuticle integrity and reducing frequent color fade caused by washing.

Numerical results highlighted by Olaplex indicate meaningful improvements in smoothness, detangling, and reduced breakage when the system is used together as directed.

In short, No.4 Bond Maintenance Shampoo isn’t just a cleanser—it’s a targeted hair-repair step that respects color, supports all hair types, and prepares strands for deeper conditioning. The compact 3.3 oz bottle makes it a practical addition to a routine you can take anywhere, without compromising on bond-boosting performance.