Johnstone's Two Pack Adhesion Promoting Primer : - is a water based curing system which promotes the adhesion on difficult substrates such ad glazed tiles or as a barrier coat against previously painted surfaces. A water thinned epoxy resin pigmented with inorganic pigments and extenders. It acts as a barrier coat and promotes adhesion over previously painted surfaces such as glazed tiles, quarry tiles, ferrous and non ferrous metals as well as many more surfaces. Application is by brush or roller which clean up after use in water.Please download the manufacturer's data sheet for full details.