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 TM 55-1905-223-SDC
Eroded piping, internal pump casings, condenser heads, and tube sheets can be repaired temporarily with the
paste mixture. The application of the paste mixture with modifications suitable to the individual repair is
substantially the same regardless of the type of small crack or cavity involved. For all such minor repairs,
after proper preparatory action has been taken, the application consists principally of troweling, squeezing, or
molding the paste mixture to conform to the defective area.
8-23. LIQUID-PASTE COMBINATION PATCH. Situations may develop where it is desirable to use the
liquid resin hardener mixture, reinforced with roving cloth, in combination with the paste resin hardener
mixture.
The woven cloth can be applied to either side of the plate resin hardener mixture used to fill the cavity (as
illustrated in FIGURE 8-13). One ply of impregnated woven roving on one side of the surface being repaired
is sufficient. When it is desirable to present a finished side, it is preferred that the paste be applied to that
side as it can be sanded or ground to conform to surface contours after it has hardened. Where it is
practicable, it is best to apply the woven roving on the pressure or impact side of the hole.
Combination patch may be employed:
a. Where insufficient quantities of material for either single type patch (liquid or paste) are available.
8-26
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