Is white cement waterproof for joint filling?

This substance is not waterproof when caulking.

White cement itself belongs to porous cavity structure and has no waterproof function. Moreover, white cement will become moldy and black when exposed to moisture for a long time. If waterproof treatment is needed, especially in areas with high waterproof requirements (such as toilets and kitchens), special waterproof caulking agent or waterproof glue can be used.

White cement is a common building material, which is mainly composed of cement and other materials. White cement can increase the overall aesthetics and waterproofness.