Plascon Woodcare Knot Seal is a quick-drying, clear sealer designed to treat knots and resinous areas in timber before painting or varnishing. It forms an impervious barrier that prevents natural wood resins from bleeding through and damaging the final coating.
 
When untreated, knots in wood can release resin over time, causing discolouration, staining, and blistering of paint or varnish. Knot Seal solves this by sealing these problem areas, ensuring a smooth, long-lasting finish.
 
Suitable for both interior and exterior wood surfaces, this product is an essential step in achieving a professional, durable result on timber such as doors, frames, furniture, and joinery.