TM 1-1520-238-23
2-96
Change 4
2.34
ELECTROMAGNETIC CONDUCTIVE COATING APPLICATION – continued
c. Repair composite parts.
NOTE
Do not touch up surfaces larger than 6 SQUARE-INCHES. If larger, reapply conductive coating to
entire surface.
This repair procedure is for existing conductive coatings on composite surfaces in need of repair.
(1) Damaged areas penetrating through the conductive coating shall be primed before application of conduc-
tive coating. Use primer coating (item 147, App F).
(2) Lightly sand the damaged area. Use cloth (item 48, App F).
(3) Clean sanded area and 2.00 INCHES beyond edge of damaged area. Use isopropyl alcohol (item 106,
App F) and cloth (item 52, App F).
(4) Mask off a minimum of 0.25 INCH beyond edge of damaged area and apply primer to surface. Use tape
(item 205, App F) and primer coating (item 147, App F). Allow primer to dry for 1 HOUR.
(5) Apply a coat of primer to surface. Use brush (item 36, App F) and epoxy primer coating kit (item 78,
App F).
(6) Cure primer at room temperature 1 HOUR.
(7) Remove tape and clean any remaining tape adhesive. Use isopropyl alcohol (item 106, App F) and cloth
(item 52, App F).
(8) Mask areas adjacent to surface to be coated with conductive coating. Ensure that surrounding areas are
protected from drips or over-spray.
NOTE
Conductive coating must be thoroughly mixed before combining due to a high conductive filler
content. The mix ratios shall be in accordance with the manufacturers instructions.
Coating material shall be thinned in accordance with the manufacture’s instructions for spraying or
brushing. The coating shall be within 2 HOURS after mixing.
Brush application of the conductive coating should be limited to minor touch-up repairs. The E.M.I.
properties of the paint may be reduced, due to surface irregularities caused by brushing.
If brush application of the conductive coating is required, go to step (9). If spray applications of the
conductive coating is required, go to step (11).
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