An end effector, coupleable to a robot, for delivering a material to a surface, comprises a material applicator assembly, comprising a central shaft and an applicator co-rotatably coupled to the central shaft and configured to apply the material to the surface. The end effector also comprises a material supply carrier, comprising a base and a supply of the material coupled to the base. The material from the supply is feedable to the applicator. The end effector further comprises an actuator that rotatably couples the material supply carrier with the material applicator assembly. The actuator is operable to rotate the material supply carrier relative to the material applicator assembly.