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 e. Recoating. Sound, intact, nonskid coatings may be recoated if the surface is lightly sanded or
roughened, cleaned, and degreased. On areas where machinery is used, the surface may be degreased
by scrubbing with a cleaning solution to remove oil, grease, fuel, and hydraulic fluids.
f. Complete Removal of Nonskid System. A portion of deteriorated nonskid coating or the complete
nonskid coating system can be removed and the surface prepared for recoating by the methods
described below.
(1) Surface Priming Metal. An anticorrosive primer is normally required over metal surfaces beneath
the nonskid topcoat. Primer not only improves the adhesion of the nonskid topcoat, but enhances the total
performance of the nonskid system. An epoxy primer is preferred and is recommended for use under all
epoxy nonskid topcoats applied over steel or aluminum surfaces. Only use primers specified by non-skid
manufacturers for types of metal other than steel and aluminum. On steel, the primer should be applied
IAW with the manufacturers requirements for surface preparation, temperature, humidity, and recoat
intervals.
(2) Rollable Nonskid Coating Application. Follow all manufacturers' requirements. Prior to applying an
application of rollable nonskid material, prepare the deck surface and prime with an epoxy primer. Ensure
that the primer coat is cured and clean prior to application of nonskid.
(a) Use a long-handled roller applicator with a free-rolling, hard-phenolic roller core (napless), 9
inches long, 1 7/16,-inch diameter, 3/32,-inch thick, slip-off design.
(b) On smooth deck surfaces, 5 gallons of material should normally cover 175 to 200 square feet
(approximately 35-40 square feet per gallon).
(c) Take into account the following factors:
1 Working life of mixed material varies with temperature and is approximately 4 hours at 24C
(75F).
2 The pot life is 4 hours at 24C (75F) (when mixed with accelerator).
3 Hard Dry is reached after 24 hours at 21C (70F) to a foot-traffic stage and to a heavier traffic
stage after 48 hours at 21C (70F).
4 Minimum cure time is 4 days at 21C (70F) (complete cure, heavy-duty vehicular traffic, aircraft
movements).
5 The strength of the ridge formation should be tested before allowing foot traffic on newly
applied coatings.
6 Cure times of nonskid coatings is a function of the surface temperature. The higher the
temperature, the sooner the cure hard condition will be reached. Conversely, the cooler the surface
temperature, the longer it will take to reach a cure hard condition. The surface temperature can be
considerably higher or lower than the air temperature depending on the time of day and the amount of
direct sun exposure. Excessively hot surfaces may cause nonskid coating defects. Excessively thick
coatings will require longer cure times and result in defects, especially on hot surfaces.
(a) Cleaning. Clean tools and equipment immediately after application is completed by using
solvents recommended by the manufacturer (such as toluol, xylol and alcohols). Observe proper handling
precautions.
(b) Appearance of Cured Material (Surface Profile). When nonskid coatings have dried and cured,
the surface profile will show a hard ridge pattern with a textured appearance of roughly parallel rows of
raised coating peaks or ridges. The aggregate shall present a uniformly coarse, rough appearance over
the entire surface. The overall surface appearance shall present a wave-like ridge pattern with raised
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