MIL-PRF-3135H
ASTM D2240
-
Standard Test Method for Rubber Property Durometer Hardness
(DoD adopted)
ASTM D3278
-
Standard Test Methods for Flash Point of Liquids by Small Scale Closed-
Cup Apparatus (DoD adopted)
ASTM F718
-
Shipbuilders and Marine Paints and Coatings Product/Procedure Data
Sheet (DoD adopted)
(Copies of these documents are available from ASTM International, 100 Barr Harbor Dr., P.O. Box C700, West
Conshohocken, PA 19428-2959 or online at www.astm.org.)
The Society for Protective Coatings (SSPC)
SSPC-SP 3
-
Power Tool Cleaning (DoD adopted)
SSPC-SP 11
-
Power Tool Cleaning to Bare Metal (DoD adopted)
(Copies of these documents are available from the Society for Protective Coatings (SSPC), 40 24th Street, 6th
Floor, Pittsburgh, PA 15222 or online at www.sspc.org.)
2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited
herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws
and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Qualification. The underlay materials furnished under this specification shall be products that are
authorized by the qualifying activity for listing on the applicable qualified products list before contract award (see
4.2 and 6.4).
3.2 Composition. Class 1 underlayment materials shall consist of a pre-mixed aggregate and latex powder (that
only requires the addition of water at time of installation). Class 2 products shall consist of three components: a
resin, hardener, and separate aggregate. The deck covering underlay materials shall be suitable for application with
a trowel after mixing by hand or with commonly available mixing tools. No specialized mixing equipment shall be
required. Mixing instructions, including any induction times or other requirements, shall be as supplied by the
manufacturer. Type I or Type II materials may include a separate primer as part of the system, or may require the
deck to be primed prior to underlayment application. Types III and IV materials shall be able to be applied directly
to a clean, bare metal substrate without requiring a separate primer (other than a bond coat of the base material
without aggregate) while still meeting all the performance requirements of this specification.
3.3 Resin based systems (Class 2 materials). The manufacturer is given their choice of ingredients used in the
formation of the resin described in this document. For resin based systems, the allowed proportions for the ratio of
resin component to hardener shall be limited to 4:1, 3:1, 2:1, or 1:1 by volume, where manufacturer's instructions
allow products to be mixed in the field by underlayment installers. When mixed and applied in accordance with the
manufacturer's instructions, the final underlayment system shall be in accordance with all requirements of this
specification.
3.4 Application. The deck covering underlay materials shall adhere to the deck or structure on which applied
without the use of clips or other devices welded to the deck, or other reinforcement not a part of the compound as
mixed for application. Types I and II underlay materials shall be applied to clean steel surfaces which have been
primed with Formula 150 in accordance with MIL-DTL-24441 and MIL-DTL-24441/20, MIL-DTL-24441/29 or an
alternative primer (e.g. an approved primer under MIL-PRF-23236 or MIL-PRF-24647) if provided by the
manufacturer as part of the underlay system. Types III and IV underlay materials shall be applied to a clean,
unprimed metal surface, prepared in accordance with SSPC-SP 3 at a minimum.
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