TT-S-708A, FEDERAL SPECIFICATION: STAIN, OIL; SEMI-TRANSPARENT, WOOD, EXTERIOR (27-APR-1962) [NO S/S DOCUMENT]
TT-S-708A, FEDERAL SPECIFICATION: STAIN, OIL; SEMI-TRANSPARENT, WOOD, EXTERIOR (27-APR-1962) [NO S/S DOCUMENT]., This specification covers one grade, one type, and three colors of semi-transparent oil stain for exterior wood. The stain produces an appearance that approximates that of western red cedar or redwood with a durable, lusterless, penetrating finish that leaves the grain pattern and texture of the wood distinctly observable. The stain has become known as the Forest Products Laboratory (FPL) Natural Wood Finish.