Efassor 12 x 28g by L Oréal Professionnel

Why you'll love it

• A professional permanent-colour remover, in a convenient 12 x 28g sachet pack
• A mild foaming bath that washes away permanent colour build-up
• Designed for colour correction and colour removal before re-colouring
• Formulated to be gentler than a full lightening service
• Single-use sachets for consistent, pre-measured dosing

The colourist's go-to for colour correction. L'Oréal Professionnel Efassor is a professional permanent-colour remover, a decolouriser that gently washes away built-up permanent colour before a new colour is applied. Mixed with developer, it creates a mild foaming bath that lifts out artificial pigment, making it an invaluable tool for colour correction and removal, evening out banding, clearing dark build-up on the lengths, or prepping the hair for a fresh application. It comes as a pack of 12 pre-measured 28g sachets, for convenient, consistent dosing.

What it does for the hair

When permanent colour builds up over repeated applications, or a colour result needs correcting, you often need to remove the existing artificial pigment before you can re-colour. That's exactly what Efassor is for: it works to break down and wash away built-up permanent colour, evening out the canvas so a new colour can go on more predictably. It's designed as a gentler approach than a full bleach/lightening service for this task, though it's still a chemical process that lifts pigment and must be handled with professional care. The single-use sachet format gives you a consistent, pre-measured dose each time, which helps with predictable, repeatable results.

How to use it

For professional use by trained colourists only. Always carry out an allergy alert test and a strand test before the service. Mix a sachet of Efassor with the appropriate developer at the ratio specified by L'Oréal to form the foaming bath, apply to the areas of built-up colour, process under supervision (checking regularly), then rinse thoroughly and neutralise/prep as needed before your subsequent colour application. Never exceed the recommended mixing ratios or processing times, and follow the full instructions.

Who it's for

This one's for professional colourists doing colour correction and removal work, clearing colour build-up, correcting a result, or prepping the hair before re-colouring. We've been perfecting colour, blow-dries and styling for clients in Codsall for years, and colour correction is one of the most skilled parts of a colourist's work, so having the right, reliable tools for it matters.

Build your routine

Colour-corrected hair needs gentle, protective aftercare. Find suitable washes in our shampoo collection, explore more colour, toning and treatments across our hair products, or browse our shop by brand pages for your favourites.

Free UK delivery on all orders.

For professional salon use only, by trained colourists following the full manufacturer's instructions. This is a chemical colour-removal product to be mixed with an appropriate developer, not used on its own. It can cause allergic reactions and skin/eye irritation: always carry out an allergy alert test and a strand test before use. Wear suitable gloves, avoid contact with the eyes and skin, do not use on an irritated or broken scalp, work in a well-ventilated area, and follow the mixing ratios and processing times exactly. Do not leave the client unattended during processing. Keep out of reach of children.