Get Off My Garden jelly like scatter crystals are effective in all weather conditions, slowly releasing a strong, highly perfumed odour which confuses both cats and dogs sense of smell. Over a period of weeks they will be trained to move away from treated areas to those where they can detect evidence of previous fouling odours. Get Off My Garden scatter crystals are approved for use on concrete, paving, and around lawns and plant beds when used as directed. This 450g container should treat a 50m² area. This product contains Methyl Nonyl Ketone which is non toxic if ingested by animals.