MIL-PRF-24667C
3.2.1 Description.
3.2.1.1 Types I-X. The total non-skid system shall consist of a non-skid topcoat, anti-corrosive primer (for
metal decks only), or primer (for fiberglass decks), any needed intermediate coatings and color topping coatings.
The composition of each individual coating of the non-skid system is the manufacturer's responsibility subject only
to the limitations of 3.2. Each individual coating of the non-skid system may be provided as one or two parts.
Types I, II, III, V, VI, VII, and VIII non-skid coatings and Type III underlayment intermediate coatings shall be
formulated for application by roller. Type IV coatings shall be formulated for application by spray only. The
application method for Type IX and X coatings shall be at the manufacturer's discretion.
3.2.1.2 Type XI. The non-skid system shall consist of a fabric, film, or composite backing having a uniform
closed coat of abrasive particles on the front surface and a pressure sensitive adhesive on the back. The abrasive
particles shall be aluminum oxide, silicon carbide, or other abrasive material with a Mohs hardness of 6 or greater.
When sized in accordance with the table on allowable limits for the sizing of abrasive grains in ANSI B74.12, the
abrasive shall have no more than 2 percent coarser than 54 grit with none coarser than 30 grit. The abrasive shall be
bonded to the backing with a resin or similar material. The adhesive on the back surface shall be of the pressure-
sensitive type and shall be covered with a removable protective cover. Asbestos fibers and components containing
asbestos fibers are prohibited (see 6.3).
3.2.1.2.1 Adhesive and protective cover. The adhesive shall be pressure sensitive, coated to cover the back side
of the non-skid system, and shall adhere immediately to smooth, clean, dry deck surfaces without wrinkling, curling,
breaking, or lifting. A protective cover shall be used to prevent contamination of the adhesive by foreign matter
until the deck treads are applied.
3.2.1.2.2 Sealing compound. The sealer is used to seal the periphery of the tread to prevent ingress of water
and other liquids, especially for cotton backed treads. The compound shall be a cold-setting type ready for use and
shall have no deleterious effect on the steel or aluminum deck surfaces or on the decking material to which applied.
The compound shall be stored in airtight metal containers for a minimum of 18 months without deterioration.
3.2.2 Volatile organic compounds (VOC) limits. When tested as specified in 4.7, the VOC of all individual
components of the non-skid system shall not be greater than that specified in table I. The selection of the solvent
portions of non-skid system is the responsibility of the manufacturer within the limitations of 3.2.3 and 3.2.5.
TABLE I. VOC limits.
Non-skid type
Maximum VOC (g/L)
Types I, II, III, IV
340
Types V, VI, VII, VIII, IX, and X
250
Type XI sealing compound
481
3.2.3 Hazardous air pollutant (HAP) content. When evaluated as specified in 4.8, the content of HAP solvents
in each individual liquid coating of all types shall be not greater than the VOC limit prescribed. Within this
limitation and the requirement that the finished coating meet all requirements of this specification, any system
solvent selection is the responsibility of the manufacturer.
3.2.4 Hazardous pigments and additives.
3.2.4.1 Metals content. When tested as specified in 4.9, the content of each soluble metal and total content of
each metal of the non-skid system shall not be greater than the values listed in tables II and III. In addition, asbestos
and asbestos from pigments shall not exceed 5 milligrams per liter (mg/L) for Types I-X. If the total metal content
for an individual metal is less than the allowed soluble metal content for that metal, the total metal value may be
submitted for the soluble metal value and the actual test for soluble metal need not be performed.
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