The Liberon Knotting Pale is a traditional, shellac-based sealant supplied in a 250ml tin, specifically formulated to prevent resin and sap bleeding through paint finishes. It effectively seals knots in bare wood, which are notorious for yellowing or discolouring subsequent paint layers, particularly white or light colours. The pale colour ensures it won't unduly darken the wood. Essential for preparing softwood timbers like pine before painting, this knotting solution ensures a long-lasting, professional, and flawless finish without unsightly resin stains.