ASTM C712-03(2009)
(Test Method)Standard Test Method for Bubbling of One-Part, Elastomeric, Solvent-Release Type Sealants
Standard Test Method for Bubbling of One-Part, Elastomeric, Solvent-Release Type Sealants
SIGNIFICANCE AND USE
The type and amount of solvent used in these sealants can sometimes give rise to surface bubbling and blistering problems. The substrate used, whether porous or nonporous, will also have an effect. Although blistering 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 blistering 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 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.
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Designation: C712 − 03(Reapproved 2009)
Standard Test Method for
Bubbling of One-Part, Elastomeric, Solvent-Release Type
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 misapplication, this test method is useful in differentiating
between a sealant that develops an acceptably smooth surface
1.1 This test method covers determination of the degree of
and one that may have blistering tendencies.
bubble formation or surface blistering in one-part, elastomeric
solvent-release type sealants when exposed to elevated tem-
5. Apparatus
peratures.
5.1 Plates, thin aluminum, approximately 3 in. (76 mm)
1.2 The subcommittee with jurisdiction is not aware of any
wide by 5 in. (127 mm) long by 0.012 in. (0.30 mm) thick.
similar ISO standard.
5.2 Blocks, cement mortar, approximately 2 in. (51 mm)
1.3 This standard does not purport to address all of the
wide by 4 in. (102 mm) long by 1 in. (25 mm) thick prepared
safety concerns, if any, associated with its use. It is the
as described in Test Methods D1191.
responsibility of the user of this standard to establish appro-
NOTE 1—Other substrates such as brick, cast stone, marble, stainless
priate safety and health practices and determine the applica-
steel, etc., may be specified either in place of the standard materials
bility of regulatory limitations prior to use.
specified in 5.1 and 5.2 or in addition to them.
2. Referenced Documents 5.3 Frame, flat, rectangular, of ⁄8-in. (3.2-mm) steel or
brass, with an opening of 1 by 3 ⁄4 in. (25 by 95 mm) and
2.1 ASTM Standards:
outside dimensions of approximately 2 by 4 ⁄4 in. (51 by 121
C717 Terminology of Building Seals and Sealants
mm).
D1191 Test Method for Concrete Joint Sealers (Withdrawn
1996) 5.4 Spatula, steel, with knife edge.
5.5 Oven,forced-draft type, having a temperature controlled
3. Terminology
at 122 6 3.6°F (50 6 2°C).
3.1 Definitions—Refer to Terminology C717 for definitions
6. Test Specimen
of the following terms used in this test method: compound,
elastomer, elastomeric, sealant, solvent-release sealant, sub-
6.1 Take the test specimen from a previously unopened
strate.
container as received from the sealant manufacturer.
4. Significance and Use
7. Procedure
4.1 The type and amount of solvent used in these sealants 7.1 Prepare three test specimens on each substrate as fol-
can sometimes give rise to surface bubbling and blistering lows: Center the frame on the test substrate and carefully fill it
problems. The substrate used, whether porous or nonporous, with compound, avoiding air pockets. Strike off the surface of
will also have an effect.Although blistering is often caused by the compound flush with the frame, to a uniform thickness of
⁄8 in. (3.2 mm). With the spatula, cut all around the outside
edge of the compound and lift the frame straight up and off.
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
7.2 Condition the specimens for 48 h at 73.4 6 3.6°F (23 6
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
General Test Methods. 2°C) and 50 6 5 % relative humidity.
Current edition ap
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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:C712–93 (Reapproved 1997) Designation:C712–03 (Reapproved 2009)
Standard Test Method for
Bubbling of One-Part, Elastomeric, Solvent-Release Type
Sealants
This standard is issued under the fixed designation C 712; 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
1.2 The subcommittee with jurisdiction is not aware of any similar ISO standard.
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
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
C 717 Terminology of Building Seals and Sealants
D 1191 Test Methods for Concrete Joint Sealers
3. Terminology
3.1 Definitions—Refer to Terminology C 717 for definitions of the following terms used in this test method: compound,
elastomer, elastomeric, sealant, solvent-release sealant, substrate.
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 problems.
The substrate used, whether porous or nonporous, will also have an effect. Although blistering 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
blistering 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, cement mortar, approximately 2 in. (51 mm) wide by 4 in. (102 mm) long by 1 in. (25 mm) thick prepared as
described in Test Methods D 1191.
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 by 3 ⁄4 in. (25 by 95 mm) and outside
dimensions of approximately 2 by 4 ⁄4 in. (51 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 Take the test specimen from a previously unopened container as received from the sealant manufacturer.
This test method is under the jurisdiction ofASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on General
Sealant Standards.Test Methods.
Current edition approved July 15, 1993.Jan. 1, 2009. Published September 1993.March 2009. Originally published as C712–72.approved in 1972. Last previous edit
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