ASTM C765-97

Standard Test Method for Low-Temperature Flexibility of Preformed Tape Sealants

SCOPE
1.1 This test method covers a laboratory procedure for testing the low-temperature flexibility of preformed tape sealants.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are provided for information purposes only.  
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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2000
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaced By: ASTM C765-97(2001)e1 - Standard Test Method for Low-Temperature Flexibility of Preformed Tape Sealants
• Effective Date: 01-Jan-2001
• Referred By: ASTM E1514-98(2017)e1 - Standard Specification for Structural Standing Seam Steel Roof Panel Systems
• Effective Date: 01-Jan-2001
• Referred By: ASTM C1281-16(2023) - Standard Specification for Preformed Tape Sealants for Glazing Applications
• Effective Date: 01-Jan-2001
• Referred By: ASTM E1637-98(2017)e1 - Standard Specification for Structural Standing Seam Aluminum Roof Panel Systems
• Effective Date: 01-Jan-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 765 – 97
Standard Test Method for
Low-Temperature Flexibility of Preformed Tape Sealants
This standard is issued under the fixed designation C 765; 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 low temperature. It will also aid in identifying sealants that
have poor flexibility because they are overextended and
1.1 This test method covers a laboratory procedure for
contain a low level of binder as well as those sealants having
testing the low-temperature flexibility of preformed tape seal-
binders that will embrittle at low temperature.
ants.
1.2 The values stated in SI units are to be regarded as the
6. Apparatus
standard. The values in parentheses are for information only.
6.1 Freezer Unit, capable of maintaining a temperature
1.3 This standard does not purport to address all of the
of−23 6 2°C (−10 6 3.6°F).
safety concerns, if any, associated with its use. It is the
6.2 Aluminum Panel (unpolished), approximately 0.635
responsibility of the user of this standard to establish appro-
mm (0.025 in.) thick, 76 mm (3 in.) wide, and 152 mm (6 in.)
priate safety and health practices and determine the applica-
long.
bility of regulatory limitations prior to use.
6.3 Steel Mandrel, 25.4 mm (1 in.) in diameter, with
2. Referenced Documents supporting holder or rack.
6.4 Vented Air Circulating Oven, that complies with Speci-
2.1 ASTM Standards:
fication E 145 and is capable of maintaining a temperature of
C 717 Terminology of Building Seals and Sealants
70 6 2°C (158 6 3.6°F).
E 145 Specification for Gravity-Convection and Forced-
Ventilation Ovens
7. Sampling
3. Terminology 7.1 Samples to be tested shall be taken from a fresh roll of
tape sealant after first removing and discarding approximately
3.1 Definitions—The definitions of the following terms used
the first 0.61 m (2 ft) of the roll.
in this test method are found in Terminology C 717: preformed
tape sealant, sealant.
8. Test Specimen
4. Summary of Test Method 8.1 Prepare the test specimen as follows:
8.1.1 Clean the 76 by 152-mm (3 by 6-in.) aluminum panel
4.1 The preformed tape sealant to be tested is applied to an
with methyl ethyl ketone or similar solvent.
aluminum panel. The assembly is heat aged, then placed in the
8.1.2 Place a 102-mm (4-in.) length of tape in the center of
freezer where the panel is quickly bent over a mandrel. The
the panel with its length paralleling that of the panel, leaving
specimen is examined for cracking and loss of adhesion.
the release paper in place on the preformed tape sealant.
5. Significance and Use
8.1.3 Apply light finger pressure to ensure intimate contact
of the preformed tape sealant with the panel.
5.1 Preformed tape sealants are tacky, deformable solids
8.1.4 Remove the release paper from the test specimen.
that are used under compression between two substrates in a
variety of sealing applications. This procedure is not intended
9. Conditioning
to simulate an actual use condition, but it will give some
9.1 Place the specimen in a horizontal position in a forced-
indication of the flexibility and adhesion of a tape at low
draft oven and condition for 14 days at 70 6 2°C (158 6
temperature. It can
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