ASTM C765-97(2001)e1

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
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaces: ASTM C765-97 - Standard Test Method for Low-Temperature Flexibility of Preformed Tape Sealants
• Effective Date: 01-Jan-2001
• Replaced By: ASTM C765-97(2007) - Standard Test Method for Low-Temperature Flexibility of Preformed Tape Sealants
• Effective Date: 01-Jun-2007
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
e1
Designation:C765–97 (Reapproved 2001)
Standard Test Method for
Low-Temperature Flexibility of Preformed Tape Sealants
This standard is issued under the fixed designation C765; 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.
e NOTE—An editorial change was made in 8.1.1 in June 2001.
1. Scope indication of the flexibility and adhesion of a tape at low
temperature. It can serve to differentiate between flexible tapes
1.1 This test method covers a laboratory procedure for
that can take some movement and those that tend to harden or
testing the low-temperature flexibility of preformed tape seal-
embrittle on aging and crack or lose adhesion when flexed at
ants.
low temperature. It will also aid in identifying sealants that
1.2 The values stated in SI units are to be regarded as the
have poor flexibility because they are overextended and
standard. The values in parentheses are for information only.
contain a low level of binder as well as those sealants having
1.3 This standard does not purport to address all of the
binders that will embrittle at low temperature.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Apparatus
priate safety and health practices and determine the applica-
6.1 Freezer Unit, capable of maintaining a temperature
bility of regulatory limitations prior to use.
of−23 6 2°C (−10 6 3.6°F).
2. Referenced Documents 6.2 Aluminum Panel (unpolished), approximately 0.635
mm (0.025 in.) thick, 76 mm (3 in.) wide, and 152 mm (6 in.)
2.1 ASTM Standards:
long.
C717 Terminology of Building Seals and Sealants
6.3 Steel Mandrel, 25.4 mm (1 in.) in diameter, with
E145 Specification for Gravity-Convection and Forced-
supporting holder or rack.
Ventilation Ovens
6.4 Vented Air Circulating Oven, that complies with Speci-
3. Terminology fication E145 and is capable of maintaining a temperature of
70 6 2°C (158 6 3.6°F).
3.1 Definitions—Thedefinitionsofthefollowingtermsused
inthistestmethodarefoundinTerminologyC717:preformed
7. Sampling
tape sealant, sealant.
7.1 Samples to be tested shall be taken from a fresh roll of
4. Summary of Test Method
tape sealant after first removing and discarding approximately
the first 0.61 m (2 ft) of the roll.
4.1 The preformed tape sealant to be tested is applied to an
aluminum panel.The assembly is heat aged, then placed in the
8. Test Specimen
freezer where the panel is quickly bent over a mandrel. The
8.1 Prepare the test specimen as follows:
specimen is examined for cracking and loss of adhesion.
8.1.1 Clean the 76-mm by 152-mm (3-in by 6-in.) alumi-
5. Significance and Use num panel with methyl ethyl ketone or similar solvent.
8.1.2 Place a 102-mm (4-in.) length of tape in the center of
5.1 Preformed tape sealants are tacky, deformable solids
the panel with its length paralleling that of the panel, leaving
that are used under compression between two substrates in a
the release paper in place on the preformed tape sealant.
variety of sealing applications. This procedure is not intended
8.1.3 Apply light finger pressure to ensure intimate contact
to simulate an actual use condition, but it will give so
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