Jo Sonja's All Purpose Sealer is a surface 'primer' and will seal a wide variety of items in preparation for painting. Pre-priming with All Purpose Sealer or Gesso will ensure good paint adhesion and will prevent moisture loss into absorbent surfaces. Use All Purpose Sealer rather than Gesso on items which require sealing without 'tooth' or opaque colour. All Purpose Sealer will assist adhesion to some plastics, soaps and wide candles where flames will not come in contact with the design. A light sanding is recommended to promote adhesion of paint to any of these surfaces.