Our waterproof cement mortar contains fine sand and cement. It provides excellent water and moisture protection in both indoor and outdoor environments. Provides comprehensive protection against damage caused by moisture. Its use method is very simple: clean the surface first, ensure that there is no debris, then wet with water, wear the included disposable gloves, then add water and stir until there are no particles or bubbles, add 250 ml of water per 1 kg, pour cement mortar on the repaired surface, polish with the included scraper and press machine and wait for 2 hours to dry. And can effectively resist the external impact, protect the building structure from damage. Suitable for all kinds of construction works, including ground, wall and underground works.