Specialist Paint Solutions Not every painting problem can be solved with products aimed at the the domestic or DIY market and, sometimes, only a product designed for professional/industrial use will do. Here are a few examples… [see also…stain-blockers] Zinsser Wallpaper Cover UpIf you’ve ever tried paintingover and existing wall covering you’ve probably found that using regular emulsion causes bubbling and lifting of the edges.This product seals the surface and provides a good background for subsequent coats of paint. It also blocks stains too. Zinsser Peel StopFor problem surfaces where existing coatings are peeling and flaking but where complete removal is impractical.Also useful for a loose and powdery surface as a last-resort solution where the only alternative is uneconomical. Ultra Grip PrimerA 2-part water-based primer designed for use on difficult to paint surfaces such as glass, ceramic tiles, powder-coated metal finishes, etc. Dulux Trade Plus SmartshieldA breathable solution for sealing exterior brickwork and masonry from water ingress.Similar, less expensive products are silicone based and although they provide a damp-proof barrier they also stop moisture escaping and often do more harm than good.