ASTM D3805/D3805M-16(2023)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3805/D3805M − 16 (Reapproved 2023)
Standard Guide for
Application of Aluminum-Pigmented Asphalt Roof Coatings
This standard is issued under the fixed designation D3805/D3805M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope phalt Roof Coatings, Nonfibered, and Fibered without
Asbestos
1.1 This guide covers the application methods for Specifi-
D4263 Test Method for Indicating Moisture in Concrete by
cation D2824/D2824M Aluminum-Pigmented Asphalt Roof
the Plastic Sheet Method
Coatings, Nonfibered, and Fibered without Asbestos, for ap-
2.2 Other Documents:
plication on asphalt built-up roof membranes, modified bitu-
Asphalt Roofing Manufacturers Association/Roof Coatings
men roof membranes, bituminous base flashings, concrete
Manufacturers Association Guidelines for Evaluating and
surfaces, metal surfaces, emulsion coatings, and solvent-based
Preparing Modified Bitumen Roofing for the Application
coatings. This guide does not apply to the selection of a specific
of Surface Coatings
aluminum-pigmented asphalt roof coating type for use on
specific projects. The fibered version of these coatings ex-
3. Significance and Use
cludes the use of asbestos fibers.
3.1 Asphalt-based, solvent-type, fibered or nonfibered,
1.2 The values stated in either SI units or inch-pound units
aluminum-pigmented roof coatings are used as a protective
are to be regarded separately as standard. The values stated in
coating for solar reflection to prolong the life of roofing
each system may not be exact equivalents; therefore, each
materials or where decorative qualities are desired.
system shall be used independently of the other. Combining
3.2 Suitable application of aluminum-pigmented asphalt
values from the two systems may result in nonconformance
roof coatings is an important factor in achieving a successful
with the standard.
long-term coating. Suitable application is, in part, dependent
1.3 This standard does not purport to address all of the
upon appropriate specifications to guide the work. This guide
safety concerns, if any, associated with its use. It is the
can be useful in facilitating development of an appropriate
responsibility of the user of this standard to establish appro-
specification for surface preparation and application of the roof
priate safety, health, and environmental practices and deter-
coating.
mine the applicability of regulatory limitations prior to use.
3.3 Designers/specifiers of coatings may use this guide in
Specific precautionary statements are given in Section 4.
preparing the application portion of their specification. Con-
1.4 This international standard was developed in accor-
tractors working directly for the building owner may also use
dance with internationally recognized principles on standard-
this guide.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.4 This guide is not all-inclusive. Manufacturer’s applica-
mendations issued by the World Trade Organization Technical
tion instructions should be consulted and geographical “area
Barriers to Trade (TBT) Committee.
practices” considered. Consult membrane manufacturer and
coating manufacturer for acceptability of procedures and
2. Referenced Documents
products.
2.1 ASTM Standards:
4. Storage
D2824/D2824M Specification for Aluminum-Pigmented As-
4.1 The container should be tightly sealed to prevent solvent
evaporation and to keep out moisture. The coatings should not
be stored at temperatures above 50 °C [120 °F]. (Warning—
This guide is under the jurisdiction of ASTM Committee D08 on Roofing and
Waterproofing and is the direct responsibility of Subcommittee D08.05 on Solvent-
When re-sealing a container, exercise caution to avoid trapping
Bearing Bituminous Compounds for Roofing and Waterproofing.
or incorporating water into the container. Water can react with
Current edition approved Sept. 1, 2023. Published September 2023. Originally
aluminum pigment producing hydrogen gas, a potential explo-
approved in 1979. Last previous edition approved in 2016 as D3805/D3805M – 16.
DOI: 10.1520/D3805_D3805M-16R23. sion hazard.)
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from Roof Coatings Manufacturers Association (RCMA), Center
the ASTM website. Park, Suite 404, 4041 Powder Mill Road, Calverton, MD 20705.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3805/D3805M − 16 (2023)
5. Equipment for Application of Coating 8.6 The previous versions of this guide required that the
surface have at least the equivalent of one complete summer of
5.1 Brush—A three-knot or four-knot roofer’s brush or other
weathering. This guide, although conservative, was generally
suitable brush.
found to be sufficient to avoid cracks and splits in the
5.2 Roller—A medium nap roller cover, suitable for use
aluminum roof coating due to substrate movement. In the
with asphalt-based, solvent-type coatings.
absence of any field history, this guide can be followed with
reasonable assurance of success.
5.3 Spray—Equipment capable of spraying coating in a
controlled manner to achieve desired application rate.
9. Surface Preparation
6. Mixing of Coating
9.1 General—Debris, dust accumulations, and other loose
6.1 The aluminum pigment and filler settle out during
materials should be removed using brooms, air blowers, or
storage. Thorough mixing of coating is necessary to redisperse
vacuum equipment. Heavily soiled areas may be washed using
these components prior to use. Mechanically mix the coating
trisodium phosphate with water and scrubbed with a broom or
until homogeneous. Periodic mixing of the coating during
power washed. Rin
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