For No-Flush™ urinals. Environmentally friendly, biodegradable and long lasting. The original Waterless™ urinal sealing liquid with a 20+ year track record. It can be added to any waterless urinal. All commercially available cleaners may be used to clean the urinal without harming BlueSeal® in the trap. An economical alternative to costly cartridge/liquid packages. Freezing point is -40° F. Zero evaporation at 100°F. Saves winterization costs! Pleasant fragrance. Improves IAQ. PortionAid Qt. Bottle measuring cup to measure out 3 oz of BlueSeal® to directly pour into trap insert or cartridge.