TM 43-0139
c.
Application. Reduce five parts by volume of primer with up to one part by volume of tap water. Stir well and filter.
d.
Drying Time. The sprayed primer will set to touch in one hour and will dry hard in 18 hours.
e.
Thinner. Thin with tap water. Do not exceed 16 percent water by volume.
Section IV. SEALERS
2-20. GENERAL
Sealers are usually unpigmented. They are used in most applications to seal the pores of wood and to serve as an
undercoat over which one or more finish coats will be applied. Sealers are also used to prevent the bleeding of underlying
substances such as stains, or to prevent resin, from knots, from entering into the finish coat. In some applications where
the decorative feature of the finish is of less importance than its sealing and protective qualities, a sealer is used for both
primer and final finish coats. Some types contain fungicides. Sealers are not normally used with CARC coatings.
2-21. OIL, LINSEED, RAW (TT-L-215)
a.
Characteristics. This is a yellowish, transparent vegetable oil extracted from flaxseeds. When exposed to the
atmosphere, this oil dries or cures by oxidation to form a tough and flexible film.
b.
Use. Linseed oil is used as a vehicle for paints, a thinner for paints, and in the formulation of oleoresinous
varnishes and enamels. It can also be used as a sealer on bare wood.
c.
Application. Apply by dipping or brushing. For dipping. allow the wood, which must be completely dry, to soak in
the oil for 24 hours before removing from the oil, wiping the excess with a squeegee or cloth, and allowing to dry.
d.
Drying Time. Air-dry (cure) for about 16 hours. A second coat may then be applied.
WARNING
Wiping-cloths soaked with linseed oil must either be destroyed or spread out to
dry in a well-ventilated area to prevent possible spontaneous combustion.
2-22. STAIN, WOOD (TT-S-270)
a.
Characteristics. This is a penetrating, wipe-off type stain containing a fungicide.
b.
Use. The stain partially penetrates clean dry wood, and is used where camouflage and a protection against fungi
is desired.
c.
Application. Apply the stain as issued by brushing, dipping, spraying, or wiping.
WARNING
This stain contains a toxic ingredient that is a skin irritant. Wear gloves when handling.
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