With the new ANTISTAIN AQUA 5210 knot sealer, Teknos is now offering an even better way of keeping discoloration under control when using knotty coniferous woods such as spruce or pine. The sprayable primer is a refinement of the successful ANTISTAIN AQUA 5200-00 knot sealer and offers enhanced protection from discoloration. Thanks to its special formula, the special primer binds the pigments in the knots, thus effectively reducing the discoloration of the final treatment. ANTISTAIN AQUA 5210 is used in a 3 or 4-layer system with wood preservative and/or intermediate and final treatment, depending on the requirements. The knot sealer has already proven its effectiveness in initial intensive tests in practice.