Olaplex Nº.4 Bond Maintenance Strengthening Shampoo

If your hair feels rough, dry, frizzy or weakened from regular styling, coloring or other chemical treatments, Olaplex Nº.4 Bond Maintenance Strengthening Shampoo is designed to make your regular wash routine more supportive of damaged hair. It is a concentrated, sulfate free shampoo made for straight, wavy, curly and coily hair, particularly medium to coarse textures. The formula gently cleanses while helping strengthen and reinforce the hair, replenish hydration and improve softness and shine.

It is available in 100ml and 250ml, making the smaller size useful if you want to try the formula before committing to the full size.

Benefits

Gently cleanses without leaving hair feeling stripped
Helps strengthen and reinforce weakened hair
Supports hydration and softness
Helps improve the appearance of shine and smoothness
Helps reduce the appearance of frizz and split ends
Suitable for straight, wavy, curly and coily hair
Color safe and suitable for chemically treated hair
Sulfate free and suitable for regular hair washing
Highly concentrated, so only a small amount is needed

Detailed Product Overview

The formula uses a blend of coconut oil derived cleansing agents designed to create a rich, abundant lather while keeping the cleansing experience gentle. It also contains Bis Aminopropyl Diglycol Dimaleate, the key ingredient associated with OLAPLEX’s bond building technology, along with conditioning and hydrating ingredients such as Panthenol, Sodium Hyaluronate, Biotin, Tocopherol, Argan Oil, Apricot Kernel Oil and Sunflower Seed Oil.

In practical terms, this makes Nº.4 more than a basic shampoo for removing oil and buildup. It is intended to fit into a strengthening haircare routine where cleansing is followed by conditioning and other repair focused products.

The formula is free of sulfates, SLS/SLES, phthalates, MIC/MIT and parabens. It is also color safe and suitable for chemically treated hair.

Texture, Lather and Real Life Experience

This is a highly concentrated shampoo, so you do not need a large amount for each wash. OLAPLEX recommends starting with around a dime sized amount and adding more only if needed. Once emulsified with wet hair, it creates an abundant lather and rinses clean.

The signature OLAPLEX scent has Grapefruit Zest as the top note, Sugared Mint and Ginger in the middle, and Crushed Sage as the base. The overall character is fresh, citrusy and clean rather than a heavy perfume style fragrance.

For Bangladesh’s warm and humid climate, this type of cleansing can be especially appealing if your hair tends to feel sweaty or weighed down between washes, while the conditioning focused formula helps avoid an overly stripped feeling.

Who Is It For?

A good choice for:

Medium to coarse hair
Straight, wavy, curly and coily hair
Dry, rough or visibly damaged lengths
Hair affected by coloring or chemical treatments
Hair that feels weak, frizzy or lacks shine
People looking for a sulfate free strengthening shampoo

It can also be used on curly hair, but anyone with very fine hair who mainly wants lightweight volume may prefer a shampoo specifically designed for fine hair. The regular Nº.4 is positioned primarily for medium to coarse textures.

If your main concern is heavy scalp buildup rather than everyday cleansing and strengthening, a clarifying shampoo may be a better addition to your routine.

Why Customers Choose It

One of the main reasons people choose Nº.4 is that it combines everyday cleansing with a strengthening focused formula. You do not need to treat shampoo as a completely separate step from your hair repair routine.

For a more complete OLAPLEX routine, you can follow it with Olaplex Nº.5 Bond Maintenance Conditioner⁠. For the finishing step, Olaplex Nº.7 Bonding Oil⁠ can be used as part of a styling routine.

How To Use

Wet your hair thoroughly.
Dispense a small amount and emulsify it between your hands.
Apply to wet hair and massage to create a lather.
Rinse thoroughly.
Follow with Nº.5 Bond Maintenance Conditioner or a suitable OLAPLEX mask.

Because the formula is concentrated, start with a small amount and add more only when necessary. Avoid contact with the eyes.

Additional Information

Brand: OLAPLEX
Product type: Strengthening shampoo
Hair type: Straight, wavy, curly and coily
Best suited for: Medium to coarse hair
Sizes: 100ml and 250ml
Finish: Clean, soft and smoother looking hair
Formula: Sulfate free
Color safe: Yes
Suitable for chemically treated hair: Yes
Signature scent: Grapefruit Zest, Sugared Mint, Ginger and Crushed Sage

Nº.4 is not simply a shampoo for making hair feel clean. Its main appeal is the combination of cleansing, hydration and strengthening support. If your hair is medium to coarse and regularly exposed to coloring, chemical processing or styling, it can make sense as an everyday shampoo.

However, if your hair is very fine and easily weighed down, a volumizing formula may suit you better. Also, if you are sensitive to fragranced haircare, note that this shampoo contains fragrance and fragrance components including citral, hexyl cinnamal and limonene.

Shop Authentic OLAPLEX in Bangladesh

You can purchase authentic OLAPLEX products from Taupe Notch, including Nº.4 Bond Maintenance Strengthening Shampoo and complementary products for a complete haircare routine.

Olaplex Nº.4 Bond Maintenance Shampoo