MIL-PRF-3135H
3.5.12 Adhesive strength.
3.5.12.1 Initial adhesive strength. The initial adhesive strength of the deck covering underlay materials shall be
not less than 1034 kilopascals (150 pounds per square inch).
3.5.12.2 Adhesive strength after aging. The adhesive strength of the deck covering underlay materials after
aging shall be not less than 85 percent of the initial adhesive strength.
3.5.12.3 Adhesive strength after exposure. The adhesive strength of the deck covering underlay materials after
exposure to moisture and temperature shall be not less than 95 percent of the initial adhesive strength.
3.5.13 Flexibility (Type IV only). Type IV materials shall exhibit no chipping, cracking, or permanent
deformation when tested as specified in 4.5.13.
3.5.14 Serviceability. The deck covering underlay material shall satisfactorily perform its function when
examined during and after the minimum shipboard service period specified in 4.5.14.
3.5.15 Off-gassing (Grade A only). The underlayment system (including any required primer and/or bond
coat) shall be tested for off-gassing in accordance with Chapter 7 of NAVSEA S9510-AB-ATM-010, and shall be
certified for and assigned a usage category of either "Limited" or "Permitted" (see 4.5.15 and 6.6).
4. VERIFICATION
4.1 Classification of tests. The inspection requirements specified herein are classified as follows:
a.
Qualification tests (see 4.2).
b.
Conformance tests (see 4.3).
4.2 Qualification tests. Qualification tests shall consist of all of the tests listed in Table III and shall be
conducted at a laboratory satisfactory to the Naval Sea Systems Command (NAVSEA).
4.2.1 Qualification sample. The qualification sample shall be drawn from a production batch and shall consist
of enough component materials (e.g., aggregate, hardener, and resin if a resin based system) to create 7.6 liters (2
gallons) of the final mixed underlayment.
4.2.2 Formulation changes. Any change in basic ingredients or manufacturing processes (other than minor
changes in pigment concentrations strictly to adjust final underlayment system color) that would affect compliance
with this specification must be reported to both the contracting activity and NAVSEA. The Government reserves
the right to require that all tests specified in this specification be re-performed on a production batch of the
underlayment produced under the new formulation or process before any shipment is accepted. Any formulation
change not disclosed to NAVSEA will result in immediate disqualification of the product.
4.3 Conformance tests. Conformance tests shall consist of specific tests identified in Table III.
4.3.1 Lot. All unmixed material of the same type, but not more than a daily production run, offered for
delivery at one time, shall be considered a lot for purposes of conformance testing. The addition of any substance to
a batch shall constitute a new lot and full conformance testing is required.
4.3.2 Sampling for conformance testing. The contractor shall select a production sample sufficiently large
enough to permit the performance of all conformance tests. At a minimum, two containers shall be selected from
each lot of rubber latex or two containers of both resin and hardener, and from each lot of underlay powder. From
each of the containers, enough material to provide for the application over a 0.8-square meter (9-square foot) area at
a thickness of 6.4 millimeters (0.25 inch) (approximate) shall be taken. If testing cannot be performed at the
manufacturer's facilities, two representative packaged samples shall be forwarded to an unaffiliated third party
laboratory for verification tests. If the underlay material is to be applied to sample panels at the vendor's facility and
forwarded to an external laboratory for testing, preparation of the panels and application of the underlayment system
must be observed by a representative from the Defense Contracts Management Agency (DCMA).
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