MIL-PRF-3135H
3.5 Performance requirements.
3.5.1 Toxicity. No component of the underlay system shall have any adverse effect on the health of personnel
when used for its intended purpose. The materials used in the underlayment shall have no known carcinogenic or
potentially carcinogenic materials identified by OSHA (29 CFR 1990) as regulated carcinogens, the IARC latest
Monographs, and the latest Annual Report on Carcinogens of the NTP; and shall have no extremely hazardous
substances (EHS) or toxic chemicals identified in 29 CFR 1910.1000, 40 CFR 302, 40 CFR 355, and 40 CFR 372,
respectively. The use of any Ozone-Depleting Substance (ODS) in any component of the underlay system under
this specification, directly or referenced in any test method, is prohibited. Class I or Class II ozone-depleting
chemicals are defined by 40 CFR 82. The manufacturer is responsible for maintaining carcinogenic free, extremely
hazardous substance free, and toxic chemical free materials. The manufacturer shall not, unless specific material
maximum levels are cited herein, allow the addition of any of these prohibited materials to the formulation. When
any of these prohibited materials are/may be present, as a result of being present as a trace or impurity in other
ingredient(s), the concentration of the prohibited material shall not exceed 0.01 percent by weight in any component
of the underlayment system.
3.5.1.1 Asbestos content. The percent by weight of asbestos in the dry underlayment shall not be in excess of
0.0005% wt as analyzed in accordance with OSHA Validated Analytical Method ID-191, "Polarization Light
Microscopy of Asbestos".
3.5.1.2 Metal content. The metal content (soluble and total) of any component of the underlay system shall be
less than the values listed in Table I when tested in accordance with 4.5.1. If the test for total metal results in a value
less than the soluble metal limit, the soluble metal test need not be conducted. The soluble metal and total metal
values shall be reported in Table I results.
TABLE I. Metals content of underlay components.
Soluble metal,
Total content,
Metal and its compound in each
maximum
maximum
underlayment dry film
mg/L (lb/gal)
% weight
-4
Antimony
15.0 (1.3x10 )
0.015
-5
Arsenic
5.0 (4.2x10 )
0.005
-3
Barium (excluding barite)
100.0 (8.3x10 )
0.10
-6
Beryllium
0.75 (6.3x10 )
0.0002
-6
Cadmium
1.0 (8.3x10 )
0.0005
-6
Chromium VI compounds
1.0 (8.3x10 )
0.001
-3
Chromium and chromium III compounds
560.0 (4.7x10 )
0.56
-4
Cobalt*
50.0 (4.2x10 )
0.005
-4
Copper
25.0 (2.1x10 )
0.01
-3
Fluoride salts
180.0 (1.5x10 )
0.18
-5
Lead
5.0 (4.2x10 )
0.005
-6
Mercury
0.2 (1.7x10 )
0.0002
-3
Molybdenum
350.0 (2.9x10 )
0.035
-4
Nickel
20.0 (1.7x10 )
0.02
-6
Selenium
1.0 (8.3x10 )
0.002
-5
Silver
5.0 (4.2x10 )
0.001
-4
Tantalum
100.0 (8.3x10 )
0.100
-5
Thallium
7.0 (5.8x10 )
0.007
-4
Tungsten
100.0 (8.3x10 )
0.100
-4
Vanadium
24.0 (2.0x10 )
0.01
-3
Zinc
250.0 (2.1x10 )
0.25
* Total cobalt content may exceed 0.005 % wt (up to 0.2 % wt) only if a cobalt drier is used to
effect proper drying. Regardless of whether a cobalt drier is used, soluble cobalt content may
not exceed Table I requirements.
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