WDMA I.S. 4-13 Industry Specification for Preservative Treatment for Millwork provides a nationally recognized standard for the water-repellent preservative treatment for millwork and serves as a basis of common understanding for producers, preservative formulators, distributors and users. The Standard is also intended to promote fair competition within the industry and to aid purchasers and users in obtaining properly treated millwork. This latest edition contains additional requirements for formulation product approval.
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