Dolomite powder for wall putty is a calcium magnesium carbonate mineral filler that manufacturers can use in suitable cement-based and polymer-modified formulations. The right grade depends on particle-size distribution, chemical composition, whiteness, moisture and batch consistency. Its suitability must always be confirmed through laboratory and production trials. Mineral fillers form the skeleton of a putty, so small shifts in fineness or moisture can change workability, finish and cost. This guide explains which properties to check, how to select a grade and what to ask a supplier before bulk procurement.