Aqua-Lock is a sealing liquid designed for sewer drains and waterless urinals. It is ideal for drains with low water flow, where there is a risk of the water trap drying out. Aqua-Lock forms a layer on the water surface, preventing unpleasant odors from escaping. It also protects water traps from drying out in drains with low water flow, ensuring that no bad smells arise from the drain. For floor drains, typically 0.25-0.5 liters of Aqua-Lock is used per drain, depending on the size of the drain.