ActiveWall Commercial Grade Micro-Iron Latex Primer is a latex-based base coat that can be applied to drywall, plaster and primed wood, metal and plastic surfaces. As with any paint product, ensure that the surface is properly prepared and clean of dust, debris and contaminants that could prevent adhesion of the ActiveWall or proper drying. If applying ActiveWall to a painted wall, be sure that the existing paint is completely dried and cured and is adhered to the wall before applying ActiveWall primer.