Olaplex No. 4 Bond Maintenance Strengthening and Reparative Hair Shampoo 250ml

✅ Product Overview

The No. 4 Bond Maintenance Shampoo from Olaplex is a reparative everyday shampoo designed to cleanse while strengthening and rebuilding hair that has been damaged—whether by color-treatments, heat styling, chemical services or everyday wear. 
It is formulated to be sulfate-free, color-safe, and suitable for all hair types — straight, wavy, curly, coily, fine, medium or thick. 

✨ Key Benefits & Features

According to the official website and authorised stockists, the main benefits include:

• Repairs and strengthens hair by helping to re-link broken disulfide bonds, the bonds inside hair that are damaged by chemical or heat treatments.

• Prevents breakage and split ends. 

• Gently cleanses without stripping the hair of moisture; leaves hair smoother, shinier, easier to manage. 

• Color-safe and free from sulfates (SLS/SLES) and many other harsh additives. 

• Suitable for daily use or for every wash.

🧴 How to Use

1. Wet your hair thoroughly. 

2. Apply a small amount of the shampoo (because it is highly concentrated, you don’t need a huge amount)

3. Massage into scalp and through hair from roots to ends.

4. Rinse thoroughly. 

5. For best results, follow with the complementary conditioner, the Olaplex No. 5 Bond Maintenance Conditioner. 

🔍 Ingredients & Technology

The hero patented ingredient is Bis-Aminopropyl Diglycol Dimaleate, which is Olaplex’s bond-building technology that works on a molecular level within the hair structure. 
Other features:

• Sulfate-free surfactants derived from coconut oil for gentle lathering. 

• Vegan, cruelty-free formulation in many markets.

👍 Pros & 👎 Cons (Based on User Feedback)

Pros:

• Many users report that their hair becomes smoother, stronger, less prone to breakage with repeated use.

  “My hair feels more solid… smoother and yes stronger.” 

• Good for damaged or processed hair, helping rebuild structure and manageability.

• Suitable for color-treated hair (doesn’t strip or dull color).

Cons / Things to Watch:

• Because it is a “bond-repairing” and strong product, some users report their scalp became greasy or heavy when using it too often or not rinsing thoroughly. 

• Some users with very high-porosity or severely damaged hair felt results took time—this is not always a quick fix.

• Price point is higher than many standard shampoos (reflecting the technology).

• As one user noted:

  “My hair feels worse than when I started using it… I have long high- porosity, lightened hair.” 
  Possibly meaning this product must be paired with good conditioning and maybe a clarifier occasionally.

🎯 Who It’s Best For

• Those with damaged, color-treated or chemically processed hair wanting to rebuild strength and structure.

• People who use heat-styling tools frequently and want to repair and protect their hair bonds.

• Individuals who prefer sulfate-free, gentler cleansing but still want performance.

• Anyone looking to maintain their hair between salon treatments or after major colour/bleach service.

🚫 Who Might Need to Be Cautious

• If your scalp is extremely oily and you find heavy conditioners/shampoos don’t work well—some users found hair felt “greasy” with this product.

• If your hair is not damaged but very fine and you prefer ultra-lightweight cleansing (though the product says suitable for all types).

• Users looking for dramatic overnight transformation—while improvements may show, bond repair often takes repeated use.