ASTM C461-23
(Test Method)Standard Test Methods for Mastics and Coatings Used With Thermal Insulation
Standard Test Methods for Mastics and Coatings Used With Thermal Insulation
ABSTRACT
These test methods cover procedures for sampling and testing mastics and coatings for use as weather and vapour barrier finishes on thermal insulations and for other accessory use. Take the samples for laboratory examination from the original containers immediately after stirring to a uniform condition. Determine the number of containers sampled as required representing a shipment. Open the original containers and examine them for uniformity of contents. The procedures for determining the stability of coatings under freezing are presented in details. The paper covers the determination of the volume of volatile matter and the coverage per unit of dry film thickness of mastics and coatings. Application of the material to the test panels shall meet the requirements prescribed, or to the thickness and by the method to be followed in practice, such as spray, brush, or trowel. Test the coated panel prepared in accordance with the required method at 15-min intervals to determine the time required to set-to-touch, and at 30-min intervals to determine the time to reach practical hardness.
SCOPE
1.1 These test methods cover procedures for sampling and testing mastics and coatings for use as weather and vapor retarder finishes on thermal insulations and for other accessory use.
1.2 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.
1.3 The test methods appear in the following order:
Section
Sampling
4
Uniformity and Storage Stability
5
Stability Under Freezing
6
Density and Weight per Gallon
7
Consistency
8
Solids Content
9
Content of Volume Solids and Coverage of Mastics and Coatings
10
Sag Resistance (Build)
11
Drying Time
12
Flash Point
13
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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
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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: C461 − 23
Standard Test Methods for
1
Mastics and Coatings Used With Thermal Insulation
This standard is issued under the fixed designation C461; 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 C419 Practice for Making and Curing Test Specimens of
Mastic Thermal Insulation Coatings
1.1 These test methods cover procedures for sampling and
D56 Test Method for Flash Point by Tag Closed Cup Tester
testing mastics and coatings for use as weather and vapor
D71 Test Method for Relative Density of Solid Pitch and
retarder finishes on thermal insulations and for other accessory
Asphalt (Displacement Method)
use.
D93 Test Methods for Flash Point by Pensky-Martens
1.2 The values stated in inch-pound units are to be regarded
Closed Cup Tester
as standard. The values given in parentheses are mathematical
D140 Practice for Sampling Asphalt Materials
conversions to SI units that are provided for information only
D1475 Test Method for Density of Liquid Coatings, Inks,
and are not considered standard.
and Related Products
1.3 The test methods appear in the following order: D2196 Test Methods for Rheological Properties of Non-
Newtonian Materials by Rotational Viscometer
Section
Sampling 4
D2369 Test Method for Volatile Content of Coatings
Uniformity and Storage Stability 5
D3278 Test Methods for Flash Point of Liquids by Small
Stability Under Freezing 6
Scale Closed-Cup Apparatus
Density and Weight per Gallon 7
Consistency 8
Solids Content 9
3. Terminology
Content of Volume Solids and Coverage of Mastics and 10
Coatings
3.1 Definitions—For definitions of terms used in these test
Sag Resistance (Build) 11
methods, see Terminology C168.
Drying Time 12
Flash Point 13
4. Sampling
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.1 Prior to opening or sampling, or both, any mastic or
coating, its Safety Data Sheet (SDS) shall be reviewed to
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- ensure appropriate precautions or personal protective
equipment, or both, are utilized.
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
4.2 Take the samples for laboratory examination from the
dance with internationally recognized principles on standard-
original containers immediately after stirring to a uniform
ization established in the Decision on Principles for the
condition. Determine the number of containers sampled as
Development of International Standards, Guides and Recom-
required to represent a shipment in accordance with Practice
mendations issued by the World Trade Organization Technical
D140. Restir the composite sample immediately before taking
Barriers to Trade (TBT) Committee.
out portions for individual tests.
2. Referenced Documents
5. Uniformity and Storage Stability
2
2.1 ASTM Standards:
5.1 Open the original containers and examine them for
C168 Terminology Relating to Thermal Insulation
uniformity of contents. Record the degree of separation, if any,
into portions of appreciably different consistency, such as thick
1
These test methods are under the jurisdiction of ASTM Committee C16 on
or thin layers, sedimentation or coagulation, etc., also of
Thermal Insulation and are the direct responsibility of Subcommittee C16.33 on
Insulation Finishes and Moisture.
difficulty encountered in stirring to a uniform condition.
Current edition approved Sept. 1, 2023. Published September 2023. Originally
5.2 Examine the contents of a full container of not less than
approved in 1960. Last previous edition approved in 2017 as C461 – 17. DOI:
10.1520/C0461-23.
1 qt (1 L) that has stood undisturbed for 48 h. Make notation
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of any separation of solvent or water, coagulation, or settle-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ment of suspended matter, that cannot be overcome by mod-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. erate agitation.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C461 − 23
5.3 Additionally, if required, examine and report the condi- 10. C
...
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: C461 − 17 C461 − 23
Standard Test Methods for
1
Mastics and Coatings Used With Thermal Insulation
This standard is issued under the fixed designation C461; 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 These test methods cover procedures for sampling and testing mastics and coatings for use as weather and vapor barrierretarder
finishes on thermal insulations and for other accessory use.
1.2 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.
1.3 The test methods appear in the following order:
Section
Sampling 4
Uniformity and Storage Stability 5
Stability Under Freezing 6
Density and Weight per Gallon 7
Consistency 8
Solids Content 9
Content of Volume Solids and Coverage of Mastics and 10
Coatings
Sag Resistance (Build) 11
Drying Time 12
Flash Point 13
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
limitations prior to use.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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.
1
These test methods are under the jurisdiction of ASTM Committee C16 on Thermal Insulation and are the direct responsibility of Subcommittee C16.33 on Insulation
Finishes and Moisture.
Current edition approved Sept. 1, 2017Sept. 1, 2023. Published September 2017September 2023. Originally approved in 1960. Last previous edition approved in 20152017
as C461 – 81 (2015). DOI: 10.1520/C0461-17.17. DOI: 10.1520/C0461-23.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C461 − 23
2. Referenced Documents
2
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
C419 Practice for Making and Curing Test Specimens of Mastic Thermal Insulation Coatings
D56 Test Method for Flash Point by Tag Closed Cup Tester
D71 Test Method for Relative Density of Solid Pitch and Asphalt (Displacement Method)
D93 Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D140 Practice for Sampling Asphalt Materials
D1475 Test Method for Density of Liquid Coatings, Inks, and Related Products
D2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
D2369 Test Method for Volatile Content of Coatings
D3278 Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus
3. Terminology
3.1 Definitions—For definitions of terms used in these test methods, see Terminology C168.
4. Sampling
4.1 Prior to opening or sampling, or both, any mastic or coating, its Safety Data Sheet (SDS) shall be reviewed to ensure
appropriate precautions or personal protective equipment, or both, are utilized.
4.2 Take the samples for laboratory examination from the original containers immediately after stirring to a uniform condition.
Determine the number of containers sampled as required to represent a shipment in accordance with Practice D140. Restir the
composite sample immediately before taking out portions for individual tests.
5. Uniformity and Storage Stability
5.1 Open the original containers and examine them for uniformity of contents. Record the degree of separation, if any, into
portions of appreciably different consistency, such as thick or thin layers, sedimentation or coagulation, etc., also of difficulty
encountered in stirring to a uniform condition.
5.2 Examine the contents of a full container of not less than 1 qt (1 L) that has stood undistur
...
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