MIL-PRF-24667C
4.5.24 Strippability (type X only). Upon completion of pressure cycling testing, panels shall be used for
strippability testing. Non-skid shall be buffed from the SHT substrate utilizing a 24 to 36 grit disc sander. The rate
for stripping one SHT tile shall be measured in minutes. Results shall be in accordance with 3.27.
4.5.25 Storage stability (types I-X).
4.5.25.1 Long-term storage stability. Full, unopened containers constituting the components of the paint or kit
[size of the container shall reflect the contract requirement (see 6.2)] of the coating system shall be kept undisturbed
for 1 year at ambient laboratory conditions. Long-term storage stability shall be evaluated by running all the
conformance inspection tests (see 4.3). Coating shall be in accordance with the requirements of 3.28.1.
4.5.25.2 Accelerated storage stability. Full, unopened container(s) constituting the components of the paint or
kit (size of the container shall reflect the contract requirement [see 6.2]) of the coating system shall be kept
undisturbed for a period of 4 weeks at a temperature of 120 °F (49 °C). Accelerated storage stability shall be
evaluated by running all of the conformance inspection tests (see 4.3) after equilibrating the coating system at
standard conditions. Coating shall be in accordance with the requirements of 3.28.2.
4.5.26 Weight. Three panels, each 6 by 12 by inches (150 by 300 by 3 millimeters), shall be prepared as
specified in 4.4.2.1. The tare weight of each panel shall be determined to the nearest 0.0002 pound (0.1 g). The
areas of the test plates shall be determined to the nearest 0.02 in2 (0.1 cm2). The non-skid coating system shall be
applied to each panel in accordance with 4.4.3 so as to completely cover the steel plates, and the coating system shall
be allowed to cure for 96 hours. After curing, any excess coating shall be cleaned from the edge of the panels. The
weight of each panel shall be determined to the nearest 0.0002 pound (0.1 g), and the tare weight shall be subtracted
to give the net weight of the coating. Average the areas of the three test plates. The three net weights shall be
averaged and divided by the average test plate area to convert to grams per square centimeter. The weight of the
coating will meet the requirements of 3.29.
4.5.27 Thickness (type XI only). Thickness shall be determined by measuring the steel plates prepared as
specified in 4.4.2.1, with and without the deck covering, at 16 equally distributed points on the specimen by means
of a dial thickness gauge and a template. The difference in thickness of the mounted steel plate and the coated steel
plate shall be averaged to determine the thickness of the material. The thickness of the coating will meet the
requirements of 3.30.
4.5.28 Size (type XI only). Each of the sample treads or rolls selected shall be visually and dimensionally
examined to determine conformance to the requirements specified in 3.31.
4.5.29 Temperature resistance (type IX). Two panels, each 6 by 12 by ¼ inches (150 by 300 by 6 millimeters),
shall be prepared as specified in 4.4.3. The panels shall then be tested in accordance with ASTM D2485, test
method B, for the time and temperatures specified. Samples shall be evaluated in accordance with the requirements
of 3.32.
4.6 Toxicity. The contractor shall have the formulations and associated toxicological information available for
review by the Navy Environmental Health Center (NEHC) as directed by the qualifying activity. The toxicity
requirements shall conform to 3.2.5.
4.7 VOC limits. The VOC of each individual coat of the non-skid coating system, with all components mixed
and in ready-to-use condition, shall be determined by Method 24 of the U.S. Environmental Protection Agency, 40
CFR60, Appendix A, Determination of Volatile Matter Content, Density, Volume Solids and Weight Solids of
Surface Coatings. VOC shall be in accordance with the requirements of 3.2.2.
4.8 HAP content of coatings. Hazardous solvent content of each individual coating shall be determined in
accordance with ASTM D3272 and ASTM E260. Solvent fractions shall be identified in accordance with ASTM
E1252 with the results recorded as percent weight of the total paint. Alternate methods of analysis must be reviewed
by NAVSEA. Formulation data may be used by manufacturers in lieu of testing to demonstrate compliance with
hazardous air pollutant requirements of this specification. The manufacturer's formulation data must have a
consistent and quantitatively known relationship to the testing required. Calculation of individual HAP contents can
be based on either manufacturer evaluation of batches or supplier data for raw materials used in the product. HAP
content shall be specified in 3.2.3.
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