ALL PURPOSE SEALER - JO SONJA MEDIUM 60ml BOTTLES ALL PURPOSE SEALER - JO SONJA MEDIUM 60ml BOTTLES £2.49 Please contact us to find out when this item will be back in stock. All Purpose Sealer is a pure acrylic medium with remarkable adhesive powers. It is a durable and versatile surface sealer that can be used to seal most surfaces in preparation for painting. Included are wood, tin & other metals, glass, unglazed bisque, terracotta, cards, paper and fi breboard. Mix with color for a one step basecoat. All Purpose Sealer will assist paint adhesion to unusual surfaces such as soaps and candles. A light sanding is recommended to promote adhesion of paint to any surface.