Bob martin spot on with dimethicone treats flea and tick infestations each application will keep your dog protected for up to 4 weeks as well as conditioning your pets fur it does not contain insecticides bob martin spot on with dimethicone is easy to use the unique formulation works by immobilising the flea or tick in a sticky trap but it will not make your pets fur sticky this treatment helps to prevent infestation at all stages of the lifecycle each pack contains 3 applications so