American Clay Add-Mix hardens the cured plaster coat and increases its durability. This makes it an excellent additive for plasters installed in damage-prone rooms and commercial applications. It is added directly to the plaster while you mix it—substituting it for up to 50% of the water. The degree of hardness in the plaster increases with the concentration of Add-Mix. A slight change in color may occur with American Clay Add-Mix. We recommend testing a small area on your wall to see the color change.

Available in 1- and 5-gallon containers.
Coverage: Varies with concentration. See product application labe

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