ASTM C957/C957M-17(2024)
(Specification)Standard Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane with Integral Wearing Surface
Standard Specification for High-Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane with Integral Wearing Surface
ABSTRACT
This specification describes the required properties and test methods for high-solids content, cold liquid-applied elastomeric membrane with integral wearing surface for waterproofing building decks not subject to hydrostatic pressure. This specification does not include specific requirements for skid resistance or fire retardance, although both may be important in specific uses. The properties to which the materials will be tested upon for conformance are as follows: weight loss of base coat; low temperature crack bridging; adhesion-in-peel to cement mortar and plywood substrates after water immersion; chemical resistance after water, ethylene glycol, and mineral spirits exposure; weathering resistance, recovery from elongation, tensile retention, and elongation retention; abrasion resistance; and stability.
SCOPE
1.1 This specification describes the required properties and test methods for a cold liquid-applied elastomeric membrane for waterproofing building decks not subject to hydrostatic pressure. The specification applies only to a membrane system that has an integral wearing surface. This specification does not include specific requirements for skid resistance or fire retardance, although both may be important in specific uses.
1.2 The type of membrane system described in this specification is used for pedestrian and vehicular traffic and in high-abrasion applications. The membrane may be single or multi-component, and may consist of one or more coats (for example base coat, top coat, etc.). The coat(s) may be built to the desired thickness in one or more applications. One coat (base coat) provides the primary waterproofing function and normally comprises the major amount of organic material in the membrane. The function of the top coat(s) is to resist wear and weather. Aggregate may be used as a component of the membrane system, as all or part of a course, to increase wear and skid resistance.
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other organizations.
1.4 Test methods in this specification require a minimum 0.5 mm [0.020 in.] base coat dry film thickness. Actual thickness required for a particular application and the use of aggregate in top coats shall be established by the membrane manufacturer.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.6 The following safety hazards caveat pertains only to the test method portion, Section 5, of this specification: This standard does not purport to address all of the safety problems, 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.
1.7 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
Relations
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: C957/C957M − 17 (Reapproved 2024)
Standard Specification for
High-Solids Content, Cold Liquid-Applied Elastomeric
Waterproofing Membrane with Integral Wearing Surface
This standard is issued under the fixed designation C957/C957M; 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 1.6 The following safety hazards caveat pertains only to the
test method portion, Section 5, of this specification: This
1.1 This specification describes the required properties and
standard does not purport to address all of the safety problems,
test methods for a cold liquid-applied elastomeric membrane
if any, associated with its use. It is the responsibility of the user
for waterproofing building decks not subject to hydrostatic
of this standard to establish appropriate safety, health, and
pressure. The specification applies only to a membrane system
environmental practices and determine the applicability of
that has an integral wearing surface. This specification does not
regulatory limitations prior to use.
include specific requirements for skid resistance or fire
1.7 This international standard was developed in accor-
retardance, although both may be important in specific uses.
dance with internationally recognized principles on standard-
1.2 The type of membrane system described in this speci-
ization established in the Decision on Principles for the
fication is used for pedestrian and vehicular traffic and in
Development of International Standards, Guides and Recom-
high-abrasion applications. The membrane may be single or
mendations issued by the World Trade Organization Technical
multi-component, and may consist of one or more coats (for
Barriers to Trade (TBT) Committee.
example base coat, top coat, etc.). The coat(s) may be built to
the desired thickness in one or more applications. One coat
2. Referenced Documents
(base coat) provides the primary waterproofing function and
2.1 ASTM Standards:
normally comprises the major amount of organic material in
C501 Test Method for Relative Resistance to Wear of
the membrane. The function of the top coat(s) is to resist wear
Unglazed Ceramic Tile by the Taber Abraser
and weather. Aggregate may be used as a component of the
C794 – 06 Test Method for Adhesion-in-Peel of Elastomeric
membrane system, as all or part of a course, to increase wear
Joint Sealants
and skid resistance.
C1305/C1305M Test Method for Crack Bridging Ability of
1.3 The committee with jurisdiction over this standard is not
Liquid-Applied Waterproofing Membrane
aware of any comparable standards published by other orga-
C1442 Practice for Conducting Tests on Sealants Using
nizations.
Artificial Weathering Apparatus
D412 Test Methods for Vulcanized Rubber and Thermoplas-
1.4 Test methods in this specification require a minimum
0.5 mm [0.020 in.] base coat dry film thickness. Actual tic Elastomers—Tension
D471 Test Method for Rubber Property—Effect of Liquids
thickness required for a particular application and the use of
aggregate in top coats shall be established by the membrane D609 Practice for Preparation of Cold-Rolled Steel Panels
for Testing Paint, Varnish, Conversion Coatings, and
manufacturer.
Related Coating Products
1.5 The values stated in either SI units or inch-pound units
D1079 Terminology Relating to Roofing and Waterproofing
are to be regarded separately as standard. The values stated in
D1133 Test Method for Kauri-Butanol Value of Hydrocar-
each system may not be exact equivalents; therefore, each
bon Solvents
system shall be used independently of the other. Combining
D2370 Test Method for Tensile Properties of Organic Coat-
values from the two systems may result in nonconformance
ings
with the standard.
D6511/D6511M Test Methods for Solvent Bearing Bitumi-
nous Compounds
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.25
on Liquid Applied Polymeric Materials Used for Roofing and Waterproofing
Membranes that are Directly Exposed to the Weather. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 15, 2024. Published April 2024. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1981. Last previous edition approved in 2017 as C957/C957M – 17. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0957_C0957M-17R24. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C957/C957M − 17 (2024)
G113 Terminology Relating to Natural and Artificial Weath- 5.4 Primer—When required by the manufacturer, use a
ering Tests of Nonmetallic Materials primer, as directed by the manufacturer, on all substrate
materials in all test assemblies.
2.2 U.S. Department of Commerce Standard:
Product Standard PS-1 Construction and Industrial Plywood
5.5 Low-Temperature Crack Bridging—Perform the test as
specified in Test Method C1305/C1305M with the following
3. Terminology
exceptions.
3.1 Definitions—Refer to Terminology D1079 for defini-
5.5.1 Test the total membrane system (primers, base coat(s)
tions of terms used in this guide.
and top coat(s)) including any aggregate specified. Total
thickness of the cured membrane, excluding aggregate, shall be
3.2 The definitions given in Terminology G113 for terms
a minimum of 0.5 mm [0.020 in.].
related to natural and artificial weathering tests are applicable
5.5.2 Extend the blocks until the space between each is
to this specification.
1 1
1.6 mm [ ⁄16 in.] rather than 3.2 mm [ ⁄8 in.].
4. Physical Requirements
5.6 Adhesion-in-Peel after Water Immersion—Perform the
4.1 Material—Membrane materials shall cure after applica- test as specified in Test Method C794 – 06 with the following
tion by spreading or spraying to form an elastomeric film qualifications:
system composed of one or more layers and capable of 5.6.1 Cement mortar shall be used as the test substrate.
maintaining a seal against water despite the existence or Additional substrates, such as plywood, shall be used when
development of small (1.6 mm [ ⁄16 in.] maximum) cracks in specified.
the substrate. It must maintain complete integrity under pedes-
5.6.2 Test only the base coat and any primer.
trian or vehicular traffic. 5.6.3 Cast the base coat in the thickness specified by the
manufacturer for one coat of the base coat, or the wet film
4.2 The physical, mechanical, and performance properties
thickness necessary to attain a dry film thickness of 0.5 mm
of the membrane shall conform to the requirements described
[0.020 in.], whichever is greater. Follow the instructions of the
in Table 1.
manufacturer regarding the time of placement of the airplane
cloth or aluminum screen.
5. Test Methods
5.6.4 For testing on plywood, use the A side of Exterior
5.1 Standard Conditions—Standard conditions for all tests
Type Marine Grade AA, AB, or AC plywood conforming to
shall be 23 6 2 °C [70 to 77 °F] and 50 6 5 % relative
U.S. Department of Commerce, Plywood Standard PS-1 as the
humidity.
substrate.
5.2 Conditioning and Mixing:
5.6.5 The sample shall be cured two weeks at standard
5.2.1 Store all membrane materials to be tested in an
conditions followed by one week at 70 °C [158 °F].
unopened container at standard conditions for at least 24 h
5.7 Chemical Resistance—Perform the test for change in
before preparing any test specimens.
tensile strength as specified in Test Method D471, with the
5.2.2 Follow the manufacturer’s instructions for all mixing
following qualifications:
and preparation of membrane materials.
5.7.1 Cast test samples of the base coat to a minimum cured
5.3 Substrates—In addition to the substrates specified
thickness of 0.5 mm [0.020 in.] in accordance with the
herein, conduct tests on such other substrates as may be
required by the specifier.
The 2006 edition of Test Method C794 is suitable for testing liquid-applied
membranes. Changes to Test Method C794 since then have optimized the standard
for testing sealants but render it less useful for testing liquid-applied membranes.
Available from Superintendent of Documents, U.S. Government Printing
Test Method C794 – 06 is available fo
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