knot sealer


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knotting, knot sealer

A sealer (such as shellac, aluminum paint, or varnish) for knots in new wood; used to prevent bleed-through of resin into paints.
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Eventually, the rosin in the knots will bleed through the finish, and although there are special knot sealers used in the finish system, they are only temporary measures.
Using the Right Wood Unlocks the Door to Fine Finishes

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