Johnstone’s Trade Covaplus Vinyl Matt is a high-quality matt emulsion suitable for all interior walls and ceilings. Its superior opacity provides great hiding power, making it easy to cover surfaces. This water-based emulsion is perfect for interior plaster surfaces such as walls and ceilings. It offers excellent opacity, so you can apply it directly to coated plaster without needing to thin it out. For new plaster surfaces, follow manufacturer's recommended dilution guidelines for the first coat.