L’Oréal Professionnel Dia Activateur 1.8% 1000ml is a low-strength professional developer created specifically for use with L’Oréal Dia colour systems, offering gentle activation and beautifully controlled tonal results. Ideal for glossing, toning and refreshing colour, this 1.8% activator supports soft colour deposit with minimal lift, making it perfect for enhancing shine, neutralising unwanted tones and reviving faded mid-lengths and ends. Its creamy, easy-mix formula applies smoothly for even saturation and consistent development, delivering a natural-looking finish with a salon-quality gloss. Supplied in a generous 1000ml bottle, it’s an essential choice for busy salons and colour professionals who want predictable performance, excellent efficiency and refined colour results.