ASTM D2824/D2824M-18(2024)

Standard Specification for Aluminum-Pigmented Asphalt Roof Coatings, Nonfibered, and Fibered without Asbestos

ABSTRACT
This specification covers three types of aluminum-pigmented asphalt roof coatings suitable for application to roofing or masonry surfaces by brush or spray. Type I is nonfibered, Type II is fibered with asbestos, and Type III is fibered other than asbestos. The coatings shall adhere to chemical requirements such as composition limits for water, nonvolatile matter, metallic aluminum, and insolubility in CS2. They shall also meet physical requirements as to uniformity, consistency, and luminous reflectance.
SCOPE
1.1 This specification covers asphalt-based, aluminum-pigmented roof coatings suitable for application to roofing or masonry surfaces by brush or spray.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.3 The following precautionary caveat pertains only to the test method portion, Section 8, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2024
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.05 - Solvent-Bearing Bituminous Compounds for Roofing and Waterproofing

Relations

• Replaces: ASTM D2824/D2824M-18 - Standard Specification for Aluminum-Pigmented Asphalt Roof Coatings, Nonfibered, and Fibered without Asbestos
• Effective Date: 01-May-2024
• Referred By: ASTM D3805/D3805M-16(2023) - Standard Guide for Application of Aluminum-Pigmented Asphalt Roof Coatings
• Effective Date: 01-May-2024

Overview

ASTM D2824/D2824M-18(2024) is a standard specification developed by ASTM International for aluminum-pigmented asphalt roof coatings. This standard defines requirements for both nonfibered and fibered roof coatings (excluding asbestos fiber) used on roofing and masonry surfaces. The coatings enhance protection, weather resistance, and solar reflectance for various types of roofs. This specification supports both brush and spray application methods and establishes uniform criteria for composition, performance, and labeling, ensuring consistency and reliability across roofing and waterproofing projects.

Key Topics

• Types of Coatings:

  • Type I: Nonfibered aluminum-pigmented asphalt roof coatings, providing a reflective surface without added fibers.
  • Type III: Fibered aluminum-pigmented asphalt roof coatings, reinforced with non-asbestos fibers for enhanced durability.

• Composition & Chemical Requirements:

  • Limits on water content, nonvolatile matter, metallic aluminum, and insoluble substances.
  • Use of an asphalt base, volatile petroleum solvents, and leafing aluminum pigment conforming to ASTM D962.

• Physical Properties:

  • Uniformity requirements ensure coatings do not separate or settle excessively over time.
  • Specific consistency standards for each coating type at room temperature.
  • Minimum solar reflectance of 50%, even after accelerated weathering and shelf aging, improving roof energy efficiency.

• Testing & Inspection:

  • Reference to standardized test methods, such as ASTM C1549 for solar reflectance and D6511/D6511M for solvent-bearing compounds.
  • Material inspection criteria and processes for rejection and resubmittal if requirements are not met.

• Packaging & Labeling:

  • All products must be properly marked to indicate compliance with ASTM International requirements.
  • Attention to safety, health, and environmental considerations as per standard guidelines.

Applications

Aluminum-pigmented asphalt roof coatings covered by ASTM D2824/D2824M-18(2024) are widely used across the construction and roofing industries for:

• Commercial and Residential Roofs: Providing a reflective, weather-resistant coating for built-up roofs, metal roofs, and various types of masonry surfaces.
• Roof Maintenance and Restoration: Enhancing the service life of existing roofing membranes and surfaces by adding solar reflectivity and water resistance.
• Energy Efficiency: Increasing solar reflectance to reduce roof temperature and lower building cooling needs, beneficial for sustainable building practices.
• Waterproofing: Improving the weatherproof capabilities of roof systems and preventing moisture intrusion.

These coatings are particularly valued for their ease of application by brush, roller, or spray, and their ability to conform to demanding environmental conditions.

Related Standards

When specifying or applying aluminum-pigmented asphalt roof coatings, consider related ASTM standards for comprehensive project guidance:

• ASTM C1549 - Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar Reflectometer.
• ASTM D962 - Specification for Aluminum Powder and Paste Pigments for Paints.
• ASTM D4798/D4798M - Practice for Accelerated Weathering Test Conditions and Procedures for Bituminous Materials (Xenon-Arc Method).
• ASTM D6511/D6511M - Test Methods for Solvent-Bearing Bituminous Compounds.

These closely linked standards support quality assurance, product selection, and compliance in roofing and waterproofing applications.

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Keywords: ASTM D2824, aluminum-pigmented roof coatings, asphalt roof coatings, nonfibered, fibered without asbestos, solar reflectance, waterproofing, roofing standard, masonry coatings, reflective roof coatings.

Standards Content (Sample)

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: D2824/D2824M − 18 (Reapproved 2024)
Standard Specification for
Aluminum-Pigmented Asphalt Roof Coatings, Nonfibered,
and Fibered without Asbestos
This standard is issued under the fixed designation D2824/D2824M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D4798/D4798M Practice for Accelerated Weathering Test
Conditions and Procedures for Bituminous Materials
1.1 This specification covers asphalt-based, aluminum-
(Xenon-Arc Method)
pigmented roof coatings suitable for application to roofing or
D6511/D6511M Test Methods for Solvent Bearing Bitumi-
masonry surfaces by brush or spray.
nous Compounds
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3. Classification
each system are not necessarily exact equivalents; therefore, to
3.1 Type I—Nonfibered, containing no fiber.
ensure conformance with the standard, each system shall be
used independently of the other, and values from the two
3.2 Type III—Fibered, containing no asbestos fiber.
systems shall not be combined.
1.3 The following precautionary caveat pertains only to the 4. Materials and Manufacture
test method portion, Section 8, of this specification: This
4.1 Asphalt-based, aluminum-pigmented roof coatings shall
standard does not purport to address all of the safety concerns,
consist of an asphalt base, volatile petroleum solvents, and a
if any, associated with its use. It is the responsibility of the user
leafing type of aluminum pigment conforming to the require-
of this standard to establish appropriate safety, health, and
ments of Specification D962, with or without fiber added. They
environmental practices and determine the applicability of
shall be mixed to a smooth, uniform consistency suitable for
regulatory limitations prior to use.
application by brush, roller, or by spraying.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5. Composition
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 5.1 Asphalt-based, aluminum-pigmented roof coatings
mendations issued by the World Trade Organization Technical complying with this specification shall conform to the follow-
Barriers to Trade (TBT) Committee. ing composition limits:
Type I Type III
2. Referenced Documents
Water, max, % 0.3 0.3
2.1 ASTM Standards:
Nonvolatile matter (NVM), min, % 40 40
C1549 Test Method for Determination of Solar Reflectance
Insoluble in CS , max, % of NVM 40 50
Metallic aluminum, min, % 11 9
Near Ambient Temperature Using a Portable Solar Reflec-
tometer
6. Physical Requirements
D962 Specification for Aluminum Powder and Paste Pig-
ments for Paints
6.1 Uniformity—After a thoroughly stirred sample has stood
for 72 h at room temperature 23 6 2 °C [73.4 6 °F] in a closed
container, it shall show no separation of solvent or settling that
This specification is under the jurisdiction of ASTM Committee D08 on
cannot be overcome by moderate stirring.
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.05
on Solvent-Bearing Bituminous Compounds for Roofing and Waterproofing.
6.2 Consistency—The roof coating shall be of a consistency
Current edition approved May 1, 2024. Published May 2024. Originally
that will spread readily
...