Barrettine Patent Knotting is a quick drying Shellac resin formulation applied over knots and resinous areas in timber such as spruce and pine.
It acts as a sealer, preventing resin from knots and soluble extractives in the wood from discolouring the paint surface.
Can be applied to bare timber inside and out prior to coating with traditional oil-based paints and semi-transparent lacquers.
If planning to apply water based primers, topcoats or light shades of semi-transparent wood lacquers, Barrettine White Knotting should be used in place of Patent Knotting.
Apply 1-2 coats by brush over knots and resinous areas.