The ultimate shellac-based primer and stain blocker. Offering excellent adhesion to glossy surfaces - even glass. Blocks stubborn and persistent stains. The advanced shellac formula seals porous surfaces with excellent enamel holdout, even sealing bleeding knots and sap streaks. Suitable for use on water stains, fungal degradation, nicotine, oil stains, marker pen stains and more. Designed to permanently block odours (from smoke and fire damage to odours from pets and nicotine). The dried film is non-toxic and hypo-allergenic and may be used in areas where incidental contact with food items occur. Ideal for interior ceilings, walls, doors and general paintable surfaces. Including spot priming on wood, metal, trims and PVC.