Cabot® Problem-Solver® primer is a solvent-based, exterior primer specially designed to provide maximum performance through a faster drying and higher-hiding formulation. In addition to excellent resistance to extractive bleeding and moisture problems, this 100% alkyd primer dries in a fraction of time compared to traditional linseed oil-based primers and facilitates the application of a quality finish coat within just a few hours. Cabot® problem-solver primer makes an ideal base coat for all types of solid stains and paints and will yield outstanding results on siding, shingles, plywood and on both smooth or rough-sawn surfaces. It is also suited for application over previously oil-based stained or painted surfaces.