Just For Men Ultra Dark Brown Ammonia Free Hair Colour Dye, No Mix Comb In Applicator to Away The Greys, & Peroxide A45

Amazon

Easy comb-in applicator for controlled application to where the grey is Shuts itself off so it can't go too dark Just comb-in and shampoo out. It takes only 10 minutes Leaves hair feeling soft and manageable Lasts up to 6 weeks until the grey grows back

Boots

15 Advantage card points. Just For Men AutoStop Hair Dye Dark Brown A-45- foolproof hair colour. FREE Delivery on orders over 45 GBP.