ASTM C712-93(1997)

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

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 This standard does not purport to address all of the safety problems, 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-1996
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaced By: ASTM C712-03 - Standard Test Method for Bubbling of One-Part, Elastomeric, Solvent-Release Type Sealants
• Effective Date: 10-May-2003
• Referred By: ASTM C1021-08(2023) - Standard Practice for Laboratories Engaged in Testing of Building Sealants
• Effective Date: 01-Jan-1997
• Referred By: ASTM C1311-22 - Standard Specification for Solvent Release Sealants
• Effective Date: 01-Jan-1997

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 712 – 93 (Reapproved 1997)
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 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)
1.1 This test method covers determination of the degree of
wide by 4 in. (102 mm) long by 1 in. (25 mm) thick prepared
bubble formation or surface blistering in one-part, elastomeric
as described in Test Methods D 1191.
solvent-release type sealants when exposed to elevated tem-
peratures.
NOTE 1—Other substrates such as brick, cast stone, marble, stainless
1.2 This standard does not purport to address all of the steel, etc., may be specified either in place of the standard materials
specified in 5.1 and 5.2 or in addition to them.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 1
5.3 Frame, flat, rectangular, of ⁄8-in. (3.2-mm) steel or
priate safety and health practices and determine the applica- 3
brass, with an opening of 1 by 3 ⁄4 in. (25 by 95 mm) and
bility of regulatory limitations prior to use. 3
outside dimensions of approximately 2 by 4 ⁄4 in. (51 by 121
mm).
2. Referenced Documents
5.4 Spatula, steel, with knife edge.
2.1 ASTM Standards:
5.5 Oven, forced-draft type, having a temperature controlled
C 717 Terminology of Building Seals and Sealants
at 122 6 3.6°F (50 6 2°C).
D 1191 Test Methods for Concrete Joint Sealers
6. Test Specimen
3. Terminology
6.1 Take the test specimen from a previously unopened
3.1 Definitions—Refer to Terminology C 717 for definitions
container as received from the sealant manufacturer.
of the following terms used in this test method: compound,
7. Procedure
elastomer, elastomeric, sealant, solvent-release sealant, sub-
strate.
7.1 Prepare three test specimens on each substrate as fol-
lows: Center the frame on the test substrate and carefully fill it
4. Significance and Use
with compound, avoiding air pockets. Strike off the surface of
4.1 The type and amount of solvent used in these sealants
the compound flush with the frame, to a uniform thickness of
can sometimes give rise to surface bubbling and blistering 1
⁄8 in. (3.2 mm). With the spatula, cut all around the outside
problems. The substrate used, whether porous or nonporous,
edge of the compound and lift the frame straight up and off.
will also have an effect. Although blistering is often caused by
7.2 Condition the specimens for 48 h at 73.4 6 3.6°F (23 6
misapplication, this test method is useful in differentiating
2°C) and 50 6 5 % relative humidity.
between a sealant that develops an acceptably smooth surface
7.3 Place the specimens in the oven at 122 6 3.6°F (50 6
and one that may have blistering tendencies.
2°C) for 72 h.
7.4 After heat exposure, allow the specimens to cool at 73.4
5. Apparatus
6 3.6°F (23 6 2°C) for 1 h.
5.1
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