L'Oreal Majirel Cool Cover Hair Colourant 50ml - 4 Brown

L'Oréal Professionnel Majirel Cool Cover Hair Colourant 50ml in shade 4 Brown is a permanent professional hair colour formulated for 100% grey coverage with a cool, ash-neutralising finish. It delivers an even, true-to-tone medium brown while caring for the hair fibre during the colouring process — a salon-grade formula designed for use by professional hairdressers or experienced home colourists.

About L'Oréal Professionnel Majirel

L'Oréal launched its very first hair dye in 1909, founded on the idea that hair colour should be both effective and respectful of the hair. Majirel is the brand's flagship permanent colour range, with the Cool Cover line specifically engineered for two priorities at once: strong grey coverage and a cool, ash-leaning result that neutralises any unwanted warmth. Shade 4 Brown sits in the medium-brown family, suited to natural bases between levels 3 and 5.

Key benefits

• Up to 100% grey coverage with intense cool tonality.
• Neutralises warmth — ideal for clients who want a true cool brown without red or copper reflections.
• Care while colouring: the formula's Ionène G and Incell technologies help reinforce the hair fibre and protect against damage.
• Long-lasting: colour vibrancy and shine maintained for up to six weeks.
• Silky finish: hair feels soft and elastic after processing.

Who it's for

Majirel Cool Cover 4 is designed for use by qualified colourists in salon, or by experienced home users familiar with mixing and developing professional colour. It is the right choice for anyone wanting full grey coverage in a cool medium brown, or wanting to deepen and neutralise warm tones in pre-coloured hair.

How to use

1. Always perform an allergy alert test 48 hours before each colouring service, even if you have used the product before.
2. Mix Majirel Cool Cover with the appropriate L'Oréal Professionnel developer in a non-metallic bowl, following the recommended ratio.
3. Apply to clean, dry hair, working in sections from roots to ends for an even result.
4. Leave to process according to professional guidelines (typically 30–35 minutes for full grey coverage).
5. Rinse thoroughly, shampoo and condition with a colour-care system. Wear gloves throughout.

Specifications

• Size: 50ml
• Shade: 4 Brown (Cool Cover)
• Type: Permanent professional hair colour
• Brand: L'Oréal Professionnel
• Range: Majirel Cool Cover

For the best result, use only with the L'Oréal Professionnel developer system and follow the salon protocol provided by your stylist or the brand education materials.