The solutions covered by this specification are intended primarily for the treatment of wood products that usually require painting or stenciling such as millwork, containers, and the like, or, in emergency situation, to treat lumber for long storage in the open, by simple, nonpressure methods without heating above the flash point of the solvents. Such treatments provide a moderate degree of resistance to shrinking and swelling and to fungi when applied to wood products that are exposed intermittently to rain wetting. They do not provide adequate protection to wood used under severe exposure conditions such as those entailing ground contact or prevalent extensive periods of wetting. Wood products for such use should be treated in accordance with the latest revision of TT-W-571, Wood Preservative; Recommended Treating Practice.

These preservatives generally present a problem of paintability if applied by pressure or other impregnation treatment.