L'Oréal Professionnel Dia Activateur

Shop L'Oréal Professionnel developers and activators at Beauty Hair UK. The developer behind the colour is what controls lift, deposit and how reliably a shade actually performs on the head, so it matters that you pair the right oxidant with the L'Oréal range you are using.

Match the activator to the colour line

L'Oréal Professionnel uses dedicated activators for its demi-permanent ranges and developer cream for permanent colour. Use this collection to find the correct strength for Majirel permanent services, the right activator for Dia Light glossing and toning, and the right pairing for Dia Richesse and Dia Color.

Why colourists buy from a focused supplier

Generic marketplaces tend to muddle developers between brands and strengths. Beauty Hair keeps L'Oréal developers and activators clearly grouped so you can buy with confidence and avoid the wrong oxidant landing on the head.

Read this if you are deciding strength

Our L'Oréal range comparison guide explains where Majirel, Dia Light and Dia Richesse sit in the same system, which makes choosing the right developer or activator considerably easier.