ASTM C1520-02

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 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

• Status: Historical
• Publication Date: 09-Jan-2002
• ICS: 87.040 - Paints and varnishes
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.10 - Specifications, Guides and Practices

Relations

• Replaced By: ASTM C1520-02(2010) - Standard Guide for Paintability of Latex Sealants
• Effective Date: 01-Oct-2010
• Referred By: ASTM C919-22 - Standard Practice for Use of Sealants in Acoustical Applications
• Effective Date: 10-Jan-2002

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
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 3.3 cracking—a failure resulting in a discontinuous film (of
paint) or bead (of sealant).
1.1 This guide describes the practical considerations that
may be used to determine the compatibility of a paint or
4. Summary of Practice
coating to be applied over a latex sealant or caulk. It evaluates
4.1 This guide reviews many of the issues concerning the
the appearance and not the performance characteristics of the
compatibility of latex sealants with paint. While the focus of
coated or painted joint.
this guide is on latex sealants, the paint or coating may be of
1.2 Thecommitteewithjurisdictionoverthisstandardisnot
any composition.
aware of any comparable standards published by other orga-
nizations.
5. Significance and Use
1.3 This standard does not purport to address all of the
5.1 The intent of this guide is to provide the reader with
safety concerns, if any, associated with its use. It is the
information concerning possible reasons for paint failures
responsibility of the user of this standard to establish appro-
where the paint is used over a latex sealant.
priate safety and health practices and determine the applica-
bility of regulatory requirements prior to use.
CONSIDERATIONS
2. Referenced Documents
6. Temperature
2.1 ASTM Standards:
6.1 Since standard testing is usually performed at “room
C717 Terminology of Building Seals and Sealants
temperature,” about 22°C, this would be considered the ideal
D1729 Practice for Visual Appraisal of Colors and Color
temperature for application and curing. As the temperature
Differences of Diffusely-Illuminated Opaque Materials
deviates from this ideal, the “science” of drying changes in as
D2244 Practice for Calculation of Color Tolerances and
much as lower temperature results in slower drying and faster
Color Differences from Instrumentally Measured Color
drying occurs at elevated temperatures.
Coordinates
E284 Terminology of Appearance
7. Percent Relative Humidity
7.1 In waterborne sealants, the humidity directly affects the
3. Terminology
ability of the system to lose water. Standard testing is typically
3.1 Definitions—Refer to Terminology C717 for definitions
done at 50 % RH, which allows for an acceptable evaporation
of the following term(s) used in this guide: compatibility, cure,
rate. Temperature and humidity variations in climatic regions
joint, latex sealant. Refer to Terminology E284 for definitions
and fluctuations through the application and cure will have
of the following term(s) used in this guide: gloss.
significant impacts.
3.2 color change—a change in either the observed (see
Practice D1729) or measured color (see Test Method D2244) 8. Type of Paint
of a substance.
8.1 The type of paint applied to the sealant has an effect on
how well it may handle dimensional changes, adhere to the
sealant or dry during the curing of the sealant. Paints made
ThisguideisunderthejurisdictionofASTMCommitteeC24onBuildingSeals
and Sealants and is the direct responsibility of Subcommittee C24.10 on Specifi- from more flexible resins (low Tg) with low pigment volume
cations, Guides and Practices.
content (PVC) (PVC << CPVC) will withstand the most
Current edition approved Jan. 10, 2002. Published April 2002. DOI: 10.1520/
change while a hard resin (high Tg) at high PVC will be the
C1520-02.
least forgiving. Broadly speaking, high gloss, interior paints
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
represent the former while interior flat paints represent the
Standards volume information, refer to the standard’s Document Summary page on
latter.
the ASTM website.
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