ASTM C712-22

Standard Test Method for Bubbling of One-Part, Elastomeric, Solvent-Release Type Sealants

SIGNIFICANCE AND USE
4.1 The type and amount of solvent used in these sealants can sometimes give rise to surface bubbling (blistering) problems. The substrate used, whether porous or nonporous, will also have an effect. Although bubbling is often caused by misapplication, this test method is useful in differentiating between a sealant that develops an acceptably smooth surface and one that may have bubbling tendencies.
SCOPE
1.1 This test method covers determination of the degree of bubble formation or surface blistering in one-part, elastomeric solvent-release type sealants when exposed to elevated temperatures.  
1.2 The subcommittee with jurisdiction is not aware of any similar ISO standard.  
1.3 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.  
1.4 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

• Status: Published
• Publication Date: 31-Dec-2021
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

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: C712 − 22
Standard Test Method for
Bubbling of One-Part, Elastomeric, Solvent-Release Type
1
Sealants
This standard is issued under the fixed designation C712; 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 elastomer, elastomeric, sealant, solvent-release sealant,
substrate, and standard conditions.
1.1 This test method covers determination of the degree of
bubble formation or surface blistering in one-part, elastomeric
4. Significance and Use
solvent-release type sealants when exposed to elevated tem-
4.1 The type and amount of solvent used in these sealants
peratures.
can sometimes give rise to surface bubbling (blistering) prob-
1.2 The subcommittee with jurisdiction is not aware of any
lems. The substrate used, whether porous or nonporous, will
similar ISO standard.
also have an effect. Although bubbling is often caused by
1.3 The values stated in inch-pound units are to be regarded
misapplication, this test method is useful in differentiating
as standard. The values given in parentheses are mathematical
between a sealant that develops an acceptably smooth surface
conversions to SI units that are provided for information only
and one that may have bubbling tendencies.
and are not considered standard.
5. Apparatus
1.4 This standard does not purport to address all of the
5.1 Plates, thin aluminum, approximately 3 in. (76 mm)
safety concerns, if any, associated with its use. It is the
wide by 5 in. (127 mm) long by 0.012 in. (0.30 mm) thick.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5.2 Blocks, prepare cement mortar, as described in Termi-
mine the applicability of regulatory limitations prior to use.
nology C719 to the following size: approximately 2 in. (51
1.5 This international standard was developed in accor-
mm) wide by 4 in. (102 mm) long by 1 in. (25 mm) thick.
dance with internationally recognized principles on standard-
NOTE 1—Other substrates such as brick, cast stone, marble, stainless
ization established in the Decision on Principles for the
steel, etc., may be specified either in place of the standard materials
Development of International Standards, Guides and Recom-
specified in 5.1 and 5.2 or in addition to them.
mendations issued by the World Trade Organization Technical
1
5.3 Frame, flat, rectangular, of ⁄8-in. (3.2-mm) steel or
Barriers to Trade (TBT) Committee.
3
brass, with an opening of 1 in. by 3 ⁄4 in. (25 mm by 95 mm)
3
2. Referenced Documents
and outside dimensions of approximately 2 in. by 4 ⁄4 in.
2
(51 mm by 121 mm).
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
5.4 Spatula, steel, with knife edge.
C719 Test Method for Adhesion and Cohesion of Elasto-
5.5 Oven,forced-drafttype,havingatemperaturecontrolled
meric Joint Sealants Under Cyclic Movement (Hockman
at 122 6 3.6 °F (50 6 2 °C).
Cycle)
6. Test Specimen
3. Terminology
6.1 Create the test specimen from a previously unopened
3.1 Definitions—Refer to Terminology C717 for definitions
container of sealant as received from the sealant manufacturer.
of the following terms used in this test method: compound,
7. Procedure
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
7.1 Prepare three test specimens on each substrate as fol-
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
General Test Methods.
lows: Center the frame on the test substrate and carefully fill it
Current edition approved Jan. 1, 2022. Published February 2022. Originally
with compound, avoiding air pockets. Strike off the surface of
approved in 1972. Last previous edition approved in 2021 as C712 – 14 (2021).
the compound flush with the frame, to a uniform thickness of
DOI: 10.1520/C0712-22.
2 1
For referenced ASTM standards, visit the ASTM website, www.astm.org, or ⁄8 in. (3.2 mm). With the spatula, cut all around the outside
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
edge of the compound and lift the frame straight up and off.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 7.2 Condition the specimens for 48 h at standard conditions.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C712 − 22
TABLE 1 Precision and Bias Data
Estimate
...

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: C712 − 14 (Reapproved 2021) C712 − 22
Standard Test Method for
Bubbling of One-Part, Elastomeric, Solvent-Release Type
1
Sealants
This standard is issued under the fixed designation C712; 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 test method covers determination of the degree of bubble formation or surface blistering in one-part, elastomeric
solvent-release type sealants when exposed to elevated temperatures.
1.2 The subcommittee with jurisdiction is not aware of any similar ISO standard.
1.3 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.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C719 Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)
3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions of the following terms used in this test method: compound,
elastomer, elastomeric, sealant, solvent-release sealant, substrate, and standard conditions.
4. Significance and Use
4.1 The type and amount of solvent used in these sealants can sometimes give rise to surface bubbling and blistering (blistering)
problems. The substrate used, whether porous or nonporous, will also have an effect. Although blisteringbubbling is often caused
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on General
Test Methods.
Current edition approved May 1, 2021Jan. 1, 2022. Published May 2021February 2022. Originally approved in 1972. Last previous edition approved in 20142021 as
C712 – 03 (2014).C712 – 14 (2021). DOI: 10.1520/C0712-14R21.10.1520/C0712-22.
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 ----------------------
C712 − 22
by misapplication, this test method is useful in differentiating between a sealant that develops an acceptably smooth surface and
one that may have blisteringbubbling tendencies.
5. Apparatus
5.1 Plates, thin aluminum, approximately 3 in. (76 mm) wide by 5 in. (127 mm) long by 0.012 in. (0.30 mm) thick.
5.2 Blocks, prepare cement mortar, as described in Terminology C719 to the following size: approximately 2 in. (51 mm) wide
by 4 in. (102 mm) long by 1 in. (25 mm) thick.
NOTE 1—Other substrates such as brick, cast stone, marble, stainless steel, etc., may be specified either in place of the standard materials specified in 5.1
and 5.2 or in addition to them.
1 3
5.3 Frame, flat, rectangular, of ⁄8-in. (3.2-mm) steel or brass, with an opening of 1 in. by 3 ⁄4 in. (25 mm by 95 mm) and outside
3
dimensions of approximately 2 in. by 4 ⁄4 in. (51 mm by 121 mm).
5.4 Spatula, steel, with knife edge.
5.5 Oven, forced-draft type, having a temperature controlled at 122 6 3.6 °F (50 6 2 °C).
6. Test Specimen
6.1 TakeCreate the test specimen from a previously unopened container of sealant as received from the sealant manufacturer.
7. Procedure
7.1 Prepare three test specimens on each substrate as follows: Center the frame on the test substrate and carefully fill it with
1
compound, avoiding air pockets. Strike off the surface of the compound flush with the frame, to
...