Abstract: An applicator for spraying hair building solids is configured for one-handed operation and includes an applicator body which is connectable with a container including hair building solids. The applicator body includes a top part, a bottom part and a main part extending between the top part and the bottom part; an air pump electrically configured for creating an air flow; and a nozzle for spraying hair building solids out from the applicator. The bottom part includes an attachment structure for attaching the container to the applicator body, a first orifice in flow connection with the air pump for delivering air flow from the air pump via the bottom part and a second orifice in flow connection with the nozzle for delivering hair building solids via the bottom part to the nozzle.