ASTM C419-20

Standard Practice for Making and Curing Test Specimens of Mastic Thermal Insulation Coatings

SIGNIFICANCE AND USE
5.1 The method of preparation of test specimens of mastic thermal insulation coatings will have an impact upon values obtained during testing. Testing laboratories shall follow this practice to help ensure the reproducibility of test methods for which a cured sheet or film of a mastic thermal insulation coating is required.
SCOPE
1.1 This practice covers the preparation of specimens of mastics and coatings in the form of cured sheets or films that are used in other procedures for evaluation of physical properties.  
1.2 Three procedures are described for casting and curing (Note 1) mastics and coatings of all types for thermal insulation. When reinforcing mesh in recommended by the mastics and coatings manufacturer, test specimens shall be prepared using reinforcing mesh.
Note 1: The term “cure” is used primarily to denote the condition that develops as the result of loss of volatile matter but also to denote possible subsequent changes in chemical or physical properties due to crosslinking.  
1.2.1 Procedure A is intended to provide a specimen of controlled thickness applied to the intended insulation for field use and equivalent in other respects to that obtainable under field application conditions.  
1.2.2 Procedure B is intended to provide a free-film specimen of controlled thickness having smooth surfaces on both sides. This type is required for some types of physical testing.  
1.2.3 Procedure C is intended to provide a free-film specimen of controlled thickness having one smooth surface (as field applied).  
1.3 The procedures of this practice are not intended for the evaluation of application properties. These are covered in Test Methods C461 and Guide C647.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 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

• Status: Published
• Publication Date: 29-Feb-2020
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.33 - Insulation Finishes and Moisture

Relations

• Referred By: ASTM C1483/C1483M-17(2022) - Standard Specification for Exterior Solar Radiation Control Coatings on Buildings
• Effective Date: 01-Mar-2020
• Referred By: ASTM C461-23 - Standard Test Methods for Mastics and Coatings Used With Thermal Insulation
• Effective Date: 01-Mar-2020

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: C419 − 20
Standard Practice for
Making and Curing Test Specimens of Mastic Thermal
1
Insulation Coatings
This standard is issued under the fixed designation C419; 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 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This practice covers the preparation of specimens of
ization established in the Decision on Principles for the
mastics and coatings in the form of cured sheets or films that
Development of International Standards, Guides and Recom-
are used in other procedures for evaluation of physical prop-
mendations issued by the World Trade Organization Technical
erties.
Barriers to Trade (TBT) Committee.
1.2 Three procedures are described for casting and curing
(Note 1) mastics and coatings of all types for thermal insula-
2. Referenced Documents
tion. When reinforcing mesh in recommended by the mastics
2
2.1 ASTM Standards:
and coatings manufacturer, test specimens shall be prepared
C168 Terminology Relating to Thermal Insulation
using reinforcing mesh.
C461 Test Methods for Mastics and Coatings Used With
NOTE 1—The term “cure” is used primarily to denote the condition that
Thermal Insulation
develops as the result of loss of volatile matter but also to denote possible
C533 Specification for Calcium Silicate Block and Pipe
subsequentchangesinchemicalorphysicalpropertiesduetocrosslinking.
Thermal Insulation
1.2.1 Procedure A is intended to provide a specimen of
C647 Guide to Properties and Tests of Mastics and Coating
controlled thickness applied to the intended insulation for field
Finishes for Thermal Insulation
use and equivalent in other respects to that obtainable under
D6/D6M Test Method for Loss on Heating of Oil and
field application conditions.
Asphaltic Compounds
1.2.2 Procedure B is intended to provide a free-film speci-
men of controlled thickness having smooth surfaces on both
3. Terminology
sides. This type is required for some types of physical testing.
3.1 Definitions—For definitions used in this practice see
1.2.3 Procedure C is intended to provide a free-film speci-
Terminology C168.
men of controlled thickness having one smooth surface (as
field applied).
4. Summary of Practice
1.3 The procedures of this practice are not intended for the
4.1 Mastics and coatings are applied by a metal blade to
evaluation of application properties. These are covered in Test
thermal insulation backing material in a thickness regulated by
Methods C461 and Guide C647.
guide bars. Moderate heat is applied to the specimens to dry or
1.4 The values stated in inch-pound units are to be regarded
otherwise cure them.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
5. Significance and Use
and are not considered standard.
5.1 The method of preparation of test specimens of mastic
1.5 This standard does not purport to address all of the
thermal insulation coatings will have an impact upon values
safety concerns, if any, associated with its use. It is the
obtained during testing. Testing laboratories shall follow this
responsibility of the user of this standard to establish appro-
practice to help ensure the reproducibility of test methods for
priate safety, health, and environmental practices and deter-
which a cured sheet or film of a mastic thermal insulation
mine the applicability of regulatory limitations prior to use.
coating is required.
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.33 on Insulation
2
Finishes and Moisture. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2020. Published April 2020. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1958. Last previous edition approved in 2013 as C419 – 08 (2013). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0419-20. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C419 − 20
6. Apparatus depressions, until a coat of uniform thickness extending from
end to end of the specimen covers the entire space between the
6.1 G
...

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: C419 − 08 (Reapproved 2013) C419 − 20
Standard Practice for
Making and Curing Test Specimens of Mastic Thermal
1
Insulation Coatings
This standard is issued under the fixed designation C419; 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 practice covers the preparation of specimens of mastics and coatings in the form of cured sheets or films that may be
are used in other procedures for evaluation of physical properties.
1.2 Three procedures are described for casting and curing (Note 1) mastics and coatings of all types for thermal insulation.
When reinforcing mesh in recommended by the mastics and coatings manufacturer, test specimens shall be prepared using
reinforcing mesh.
NOTE 1—The term “cure” is used primarily to denote the condition that develops as the result of loss of volatile matter but also to denote possible
subsequent changes in chemical or physical properties due to crosslinking.
1.2.1 Procedure A is intended to provide a specimen of controlled thickness applied to insulation, the intended insulation for
field use and equivalent in other respects to that obtainable under field application conditions. The thermal insulation intended for
field use may be specified as the backing.
1.2.2 Procedure B is intended to provide a free-film specimen of controlled thickness having smooth surfaces on both sides. This
type is required for some types of physical testing.
1.2.3 Procedure C is intended to provide a free-film specimen of controlled thickness having one smooth surface (as field
applied).
1.3 The procedures of this practice are not intended for the evaluation of application properties. These are covered in Test
Methods C461 and Guide C647.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
C461 Test Methods for Mastics and Coatings Used With Thermal Insulation
C533 Specification for Calcium Silicate Block and Pipe Thermal Insulation
C647 Guide to Properties and Tests of Mastics and Coating Finishes for Thermal Insulation
D6/D6M Test Method for Loss on Heating of Oil and Asphaltic Compounds
3. Terminology
3.1 Definitions—For definitions used in this practice see Terminology C168.
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.33 on Insulation Finishes
and Moisture.
Current edition approved Nov. 1, 2013March 1, 2020. Published March 2014April 2020. Originally approved in 1958. Last previous edition approved in 20082013 as
C419 – 08.C419 – 08 (2013). DOI: 10.1520/C0419-08R13.10.1520/C0419-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C419 − 20
4. Summary of Practice
4.1 Mastics and coatings are applied by a metal blade to thermal insulation backing material in a thickness regulated by guide
bars. Moderate heat is applied to the specimens to dry or otherwise cure them.
5. Significance and Use
5.1 The method of preparation of test specimens of mastic thermal insulation coatings canwill have an impact upon values
obtained during testing. Testing laborato
...