While in floor drains this product remains indefinitely in the trap with now use, sealing out odors and the worry of traps drying out. Has zero evaporation at 100°F and does not freeze above -70°F. This no freezing feature allows facilities to eliminate or reduce urinal winterization costs. When used in waterless urinals, small amounts of the sealant do get carried out with each urinal use, regular maintenance is required.