WHAT IT IS Clash Hair Gum was inspired by the creativity style and rock lsquo n rsquo roll musical history of London and is not afraid to get rough. WHAT IT DOES Johnny B. Clash Hair Gum s distinct texture gives you the ability to groom your own bespoke hair experience without cocktailing it with other products. This all-in-one power player combines the features of a pomade wax and clay resulting in a classic finish with heavy hold.