The type of PVC utilised allows Waterstops to be used on concrete structures exposed to temperatures between -30°C and +70°C, ensuring considerable resistance to ageing, chemical aggression in alkaline environments, salt water and acid solutions. They are resistant to deterioration caused by chemicals normally found in groundwater. They have high flexibility even at low temperatures. Their mechanical properties remain unchanged over time. They are compatible with prefabricated synthetic PVC membranes.