Olaplex No.4 Bond Maintenance shampoo 250ml

Description

Olaplex No.4 shampoo is a concentrated, lathering bond maintenance shampoo made for every wash. It comes in 250 ml, 525 ml and 1000 ml bottles, so you can choose the size that suits you. The shampoo cleanses, hydrates and nourishes, and it is colour-safe.

This shampoo won the Allure Readers' Choice Award 2026 and 2025 in the shampoo category.

What is Olaplex No.4 shampoo?

Olaplex No.4 is a colour-safe shampoo with a concentrated, richly lathering formula. It is built on the patented Olaplex bond building technology. The shampoo cleanses away impurities while it hydrates, moisturises and nourishes hair. It also helps strengthen hair, prevent breakage and repair split ends.

The shampoo suits all hair types. The formula is vegan and cruelty free, with a pH of 6 to 6.5. It is free from DEA, aldehydes, formaldehyde, gluten, nuts, parabens and phthalates.

Choose your size

The shampoo comes in three sizes: 250 ml, 525 ml and 1000 ml. Pick the bottle by how often you wash and how much hair you have. A larger bottle is convenient when No.4 is your regular wash. A smaller one works well if you would like to try the routine at a relaxed pace first.

How to use

1. Wet your hair.
2. Dispense the shampoo into your hands and emulsify it. The formula is concentrated, so a small amount is enough. With thin hair, start with an even smaller amount.
3. Massage it through your hair, concentrating on the scalp and roots.
4. Rinse thoroughly.
5. Follow with Olaplex No.5 conditioner.

Use the shampoo at every wash. Within the Olaplex system, you use it after rinsing out No.3.

One of three steps

Olaplex builds its care from three parts: No.3, No.4 and No.5. The first is a treatment, the second a daily cleanse and the third a hydrating conditioner. In this system No.4 is the cleansing step that leaves hair fresh and ready for the next product. If you already have No.5, No.4 is its natural partner.

A small wash-day pleasure

A good shampoo turns a shower into a little moment for yourself. The lathering formula gives washing a rich feel and cleanses your hair. Take your time, massage your scalp and let the foam move under your fingers. After rinsing, your hair is clean and ready for the conditioner that adds the final touch of care.

If you wash your hair often, a larger bottle is a practical choice. It keeps the wash simple and makes sure the care you need is always within reach. The routine is the same whether you wash in the morning before work or in the evening after a long day.

Who No.4 is for

Olaplex No.4 shampoo suits anyone who wants to wash their hair gently yet thoroughly. The colour-safe formula is a pleasant choice for people with coloured hair. It works equally well on natural hair, because the shampoo suits all hair types. If your hair has split ends or visible damage, regular use supports its strength. Olaplex No.4 shampoo is a simple solution for anyone who wants one familiar product for every wash.

The same routine in every size

Whether you choose the 250 ml, 525 ml or 1000 ml bottle, use is always the same: wet hair, a small amount, a massage and a thorough rinse. That makes choosing a size easy and lets you match the care to your needs. When a bottle runs low, you know exactly what to pick next. The lathering formula turns washing into a calm and pleasant ritual.

A gift for well-cared-for hair

Olaplex is a familiar name among hair care fans. If you know someone who loves looking after their hair, the No.4 shampoo together with the conditioner makes a thoughtful gift. A larger bottle is an especially generous present and will be useful for a long time.

Frequently asked questions

How much shampoo should I use?

The formula is concentrated, so a small amount is enough. With thin hair, start with even less.

How often should I use this shampoo?

Use it at every wash.

Which conditioner goes with it?

Follow with conditioner No.5. The two products form a pair that you use at every wash.

Which sizes are available?

The shampoo comes in 250 ml, 525 ml and 1000 ml bottles. You will find more products in the shampoo category.