Barrettine Patent Knotting
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A quick drying Shellac in Alcohol which is applied over Knots and resinous areas in wood to seal prior to painting.
Patent Knotting prevents the resins naturally found in woods being dissolved by the solvents present in most paints and seeping to the top surface, discolouring the paint finish.
For use both internally and externally.
NOT recommended for use with waterbased and/or lighter shades of Topcoat paint - use White Knotting.