Just For Men Ultra Real Black Hair Colour Dye, No Mix Comb In Applicator to Away The Greys, Ammonia & Peroxide Free A55

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

24 Advantage card points. Just For Men AutoStop Hair Dye Real Black Hair A-55 - foolproof hair colour. FREE Delivery on orders over 45 GBP.