The Hills 5ltr Heavy Duty Industrial Pressure Sprayer with Viton® seals for chemical resistance is a multipurpose garden or chemical sprayer for use in pest control, wood treatments, acid & alkali solutions, horticulture, animal care, cleaning and sanitation. We recommend you wash out the pump sprayer thoroughly after using any chemicals, insecticides, herbicides or fertiliser applications, so the washers do not disintegrate and do not leave insecticide, herbicide or fertiliser sprays in pump sprayer.