A seed treater comprises a rotatable bowl positioned in a bowl containment, the containment closeable with the rotatable bowl therein and having ports or inlet for seed and seed treatment chemicals, the containment having a containment base and a cover. The containment base having a generally cylindrical wall portion, a bottom wall portion below the bowl, and a corner wall portion connecting the cylindrical wall portion and the bottom wall portion. The containment base having access ports for cleaning and the corner wall portion is a curved wall portion having a radius of curvature of at least one inch with no sharp interior corners between the planar bottom wall portion and the cylindrical wall portion. A liner, such as a polymer liner, may be installed on the cylindrical wall such that it is adjacent the upper edge of the bowl and extending upwardly on the cylindrical wall. Whereby a batch seed treater is provided with enhanced cleaning and maintenance capabilities.
