The premixed product is convenient because it does not require mixing, but many professionals still mix it before they use it. Mixing removes some of the stiffness and makes it easier to spread. For final coats, some add a small amount of water to the compound while mixing.

Do I need to add water to premixed joint compound?

No, Sheetrock® Brand UltraLightweight All Purpose Joint Compound is formulated as a ready-to-use product. Simply mix and use. If adding water, use sparingly and test apply.

Should you add water to bucket mud?

Depending on how thick the compound is right out of the box, add approximately 16-32 ounces of water for a full bucket or box. Add it a little bit at a time to see how your mud reacts to adding water. If you are pre-filling your joints with set type compound, then you can run your compound a little thinner.