Muralo’s 563 interior and exterior primer has been reformulated to meet the growing market demand for high-performance eco-friendly products. This reformulation combines new green technology with 563’s time-tested features. Formulated with no harmful solvents, 563 is a water-based latex, based on a sustainable chemistry technology. It meets or exceeds Green Seal and LEED green building requirements. This fast drying, virtually odorless, zero VOC primer/sealer is specified for space that is occupied during painting. It’s also ideal for nursing homes, schools, babies’ rooms and health care facilities, as well as the hotel/motel industries. 563 is recommended for use on all new or old interior surfaces and previously painted exterior surfaces in sound condition. It’s especially effective on porous and uneven substrates such as drywall, tape joints, plaster and plastered spots. 563 is suitable for use under oil, alkyd or latex topcoats. 563 Painters Primer is certified by Coatings Research Group, Incorporated to meet environmentally determined performance standards established by CRGI’s ISO-accredited facility for specific product types and to meet or exceed the VOC requirements of LEED for most paint and coatings applications.