This Colron Knotting Solution is designed for use prior to applying woodcare coatings or paint. It effectively seals and stabilises resinous knots in wood, preventing discolouration of your finished surfaces. The solution is quick-drying and comes with a brush for easy application. It permanently seals and stabilises knots in resinous wood, which is essential prior to varnishing, painting, waxing or oiling timber to prevent future discolouration. This product stops wood resins from staining through and permanently prevents paintwork from being ruined.