Abstract: The invention generally relates to a surface treatment distribution apparatus and spray assembly apparatus method capable of applying a variety of surface treatments, for example mastic surface treatments, to a variety of highways, roadways and other asphalt surfaces of variable shapes and sizes. The invention generally includes a tank, pumps, operator station, control inputs, filter assemblies, spray bar and self cleaning spray tip assemblies. Each spray tip assembly includes a self cleaning functionality whereby the operator may remove any debris or clogging material from one or more spray tips with a pneumatically actuated plunger located in the spray tip assembly that acts to force the debris or blockage out of the spray tip. The plunger retracts after actuation and the spray tip assembly is then ready to resume spray operations as desired by the operator.

Abstract: The invention generally relates to a surface treatment distribution apparatus and spray assembly apparatus method capable of applying a variety of surface treatments, for example mastic surface treatments, to a variety of highways, roadways and other asphalt surfaces of variable shapes and sizes. The invention generally includes a tank, pumps, operator station, control inputs, filter assemblies, spray bar and self cleaning spray tip assemblies. Each spray tip assembly includes a self cleaning functionality whereby the operator may remove any debris or clogging material from one or more spray tips with a pneumatically actuated plunger located in the spray tip assembly that acts to force the debris or blockage out of the spray tip. The plunger retracts after actuation and the spray tip assembly is then ready to resume spray operations as desired by the operator.