No, only when mixing.
The longest it can take is 8 hours, but it can also be set in 6 hours.
You will need to mix the white cement with white sand to make sure it stays white.
White cement can be used to fill the gaps between tiles. You can mix the cement with colour pigments that can help you match the colour of your tiles.
Structures made of white Portland cement can withstand heat and water.
Snowcrete is a white cement used for architectural uses. White concrete is strong and durable.