ASTM C1520-02(2010)
(Guide)Standard Guide for Paintability of Latex Sealants
Standard Guide for Paintability of Latex Sealants
SIGNIFICANCE AND USE
The intent of this guide is to provide the reader with information concerning possible reasons for paint failures where the paint is used over a latex sealant.
SCOPE
1.1 This guide describes the practical considerations that may be used to determine the compatibility of a paint or coating to be applied over a latex sealant or caulk. It evaluates the appearance and not the performance characteristics of the coated or painted joint.
1.2 The committee with jurisdiction over this standard is not aware of any comparable standards published by other organizations.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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 and health practices and determine the applicability of regulatory requirements prior to use.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1520 − 02(Reapproved 2010)
Standard Guide for
Paintability of Latex Sealants
This standard is issued under the fixed designation C1520; 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 3.2 color change—a change in either the observed (see
Practice D1729) or measured color (see Test Method D2244)
1.1 This guide describes the practical considerations that
of a substance.
may be used to determine the compatibility of a paint or
3.3 cracking—a failure resulting in a discontinuous film (of
coating to be applied over a latex sealant or caulk. It evaluates
paint) or bead (of sealant).
the appearance and not the performance characteristics of the
coated or painted joint.
4. Summary of Practice
1.2 Thecommitteewithjurisdictionoverthisstandardisnot
4.1 This guide reviews many of the issues concerning the
aware of any comparable standards published by other orga-
compatibility of latex sealants with paint. While the focus of
nizations.
this guide is on latex sealants, the paint or coating may be of
1.3 The values stated in SI units are to be regarded as
any composition.
standard. No other units of measurement are included in this
5. Significance and Use
standard.
5.1 The intent of this guide is to provide the reader with
1.4 This standard does not purport to address all of the
information concerning possible reasons for paint failures
safety concerns, if any, associated with its use. It is the
where the paint is used over a latex sealant.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
CONSIDERATIONS
bility of regulatory requirements prior to use.
6. Temperature
2. Referenced Documents
6.1 Since standard testing is usually performed at “room
2.1 ASTM Standards:
temperature,” about 22°C, this would be considered the ideal
C717 Terminology of Building Seals and Sealants
temperature for application and curing. As the temperature
D1729 Practice for Visual Appraisal of Colors and Color
deviates from this ideal, the “science” of drying changes in as
Differences of Diffusely-Illuminated Opaque Materials
much as lower temperature results in slower drying and faster
D2244 Practice for Calculation of Color Tolerances and
drying occurs at elevated temperatures.
Color Differences from Instrumentally Measured Color
7. Percent Relative Humidity
Coordinates
E284 Terminology of Appearance 7.1 In waterborne sealants, the humidity directly affects the
ability of the system to lose water. Standard testing is typically
3. Terminology
done at 50 % RH, which allows for an acceptable evaporation
rate. Temperature and humidity variations in climatic regions
3.1 Definitions—Refer to Terminology C717 for definitions
and fluctuations through the application and cure will have
of the following term(s) used in this guide: compatibility, cure,
significant impacts.
joint, latex sealant. Refer to Terminology E284 for definitions
of the following term(s) used in this guide: gloss.
8. Type of Paint
8.1 The type of paint applied to the sealant has an effect on
ThisguideisunderthejurisdictionofASTMCommitteeC24onBuildingSeals
how well it may handle dimensional changes, adhere to the
and Sealants and is the direct responsibility of Subcommittee C24.10 on
sealant or dry during the curing of the sealant. Paints made
Specifications, Guides and Practices.
from more flexible resins (low Tg) with low pigment volume
Current edition approved Oct. 1, 2010. Published November 2010. Originally
content (PVC) (PVC << CPVC) will withstand the most
approved in 2002. Last previous edition approved in 2002 as C1520-02. DOI:
10.1520/C1520-02R10.
change while a hard resin (high Tg) at high PVC will be the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
least forgiving. Broadly speaking, high gloss, interior paints
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
represent the former while interior flat paints represent the
Standards volume information, refer to the standard’s Document Summary p
...
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