ASTM C957/C957M-10

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C957–06 Designation: C957/C957M – 10
Standard Specification for
High-Solids Content, Cold Liquid-Applied Elastomeric
1
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
1.1 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.
1.4Test 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 topcoats shall be established by the membrane manufacturer.
1.5The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information
purposes only.
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 topcoats 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 non-conformance 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C501 Test Method for Relative Resistance to Wear of Unglazed Ceramic Tile by the Taber Abraser
C717 Terminology of Building Seals and Sealants C719Test Method forAdhesion and Cohesion of Elastomeric Joint Sealants
Under Cyclic Movement (Hockman Cycle)
C794 Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants C836Specification for High Solids Content, Cold
Liquid-Applied Elastomeric Waterproofing Mem-
brane for Use with Separate Wearing Course
C1250 Test Method for Nonvolatile Content of Cold Liquid-Applied Elastomeric Waterproofing Membranes
C1305 Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing Membrane
C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
1
This specification is under the jurisdiction ofASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.80 on Building
Deck Waterproofing Systems (Disbanded 6/06).
Current edition approved July 1, 2006. Published August 2006. Originally approved in 1981. Last previous edition approved in 2005 as C957–05a. DOI:
10.1520/C0957-06.D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.22 on Waterproofing and Dampproofing Systems.
Current edition approved May 1, 2010. Published May 2010. Originally approved in 1981. Last previous edition approved in 2006 as C957 – 06. DOI
...