Blockade, a high-performance shellac sealer primer to: Permanently kill stains and odours Seal knots Cover damage from water, smoke and mould Coverage - 12.5 square metres per litre Uses - Covers glossy surfaces such as tile, varnish or gloss paints with no sanding needed, plus hard-to-paint surfaces such as metal, drywall, plaster and porous wallcoverings Drying time - 15mins, overcoat in 45mins Blockade provides excellent adhesion to almost all interior surfaces such as previously coated and new wood, plaster, drywall, porous wallcoverings, metal and tile and requires minimal preparation before use. Blockade is quick drying, saving time on jobs that require multiple coats or to be quickly overcoated with emulsion. It covers glossy and hard-to-paint surfaces such as tile, varnish or gloss paints with no sanding needed. The pure shellac base permanently blocks stains and odours