ASTM D5643/D5643M-06(2024)

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: D5643/D5643M − 06 (Reapproved 2024)
Standard Specification for
Coal Tar Roof Cement, Asbestos Free
This standard is issued under the fixed designation D5643/D5643M; 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 3. Materials and Manufacture
1.1 This specification covers coal tar roof cement suitable 3.1 Coal tar roof cement shall consist of a processed coal tar
for trowel application in coal tar roofing and flashing systems. base, volatile solvents, and mineral stabilizers, excluding
asbestos, mixed to a smooth, uniform consistency suitable for
1.2 The values stated in either SI units or inch-pound units
trowel application.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
4. Chemical Composition
system shall be used independently of the other. Combining
values from the two systems may result in nonconformance 4.1 The composition of coal tar roof cement shall conform
to the requirements prescribed in Table 1.
with the standard.
1.3 This standard does not purport to address all of the
5. Performance Requirements
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 5.1 Uniformity—A thoroughly stirred sample shall show no
separation of solvent or settling that cannot be overcome by
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. moderate stirring after standing for 72 h at room temperature in
a closed container.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
5.2 Workability—The cement shall be of such a consistency
ization established in the Decision on Principles for the
that it will spread readily and permit troweling smooth coatings
Development of International Standards, Guides and Recom-
1 1
1.6 to 3.2 mm [ ⁄16 to ⁄8 in.] thick on vertical surfaces.
mendations issued by the World Trade Organization Technical
5.3 Behavior at 60 °C [140 °F]—The cement shall show no
Barriers to Trade (TBT) Committee.
evidence of blistering, and sag or slide shall be no greater than
6 mm [ ⁄4 in.].
2. Referenced Documents
5.4 Adhesion to Wet Surfaces—Minimum average 75 %.
2.1 ASTM Standards:
D4 Test Method for Bitumen Content
5.5 Flash Point—38 °C [100 °F] minimum.
D95 Test Method for Water in Petroleum Products and
Bituminous Materials by Distillation
6. Sampling
D140/D140M Practice for Sampling Asphalt Materials
6.1 Sample the material from the original container imme-
D3143/D3143M Test Method for Flash Point of Cutback
diately after stirring to a uniform consistency, in accordance
Asphalt with Tag Open-Cup Apparatus
with Practice D140/D140M.
D3409/D3409M Test Method for Adhesion of Asphalt-Roof
6.2 Restir the samples to obtain uniformity immediately
Cement to Damp, Wet, or Underwater Surfaces
before withdrawing portions for individual tests.
D6511/D6511M Test Methods for Solvent Bearing Bitumi-
nous Compounds
7. Test Methods
7.1 Water—See Test Method D95.
This specification is under the jurisdiction of ASTM Committee D08 on
7.2 Nonvolatile Matter—Determine nonvolatile matter in
Roofing and Wa
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