ASTM C972-18
(Test Method)Standard Test Method for Compression-Recovery of Tape Sealant
Standard Test Method for Compression-Recovery of Tape Sealant
SIGNIFICANCE AND USE
4.1 Tape sealants are tacky, deformable solids used under compression between two or more surfaces of similar or dissimilar materials in a variety of sealing applications. This procedure presents an indication of the compression recovery characteristics of preformed tapes.
SCOPE
1.1 This test method describes a laboratory procedure for determining compression-recovery characteristics of tape sealant.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There are no ISO standards similar or equivalent to this ASTM standard.
1.4 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.
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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: C972 − 18
Standard Test Method for
1
Compression-Recovery of Tape Sealant
This standard is issued under the fixed designation C972; 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 procedure presents an indication of the compression recovery
characteristics of preformed tapes.
1.1 This test method describes a laboratory procedure for
determining compression-recovery characteristics of tape seal-
5. Apparatus
ant.
5.1 Glass Plates, two, each 6.35 by 76.2 by 76.2 mm (0.25
1.2 The values stated in SI units are to be regarded as the
by 3 by 3 in.).
standard. The values given in parentheses are for information
only. 5.2 Steel Panels, two, cold-rolled, each 0.762 by 76.2 by
76.2 mm (0.03 by 3 by 3 in.).
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
NOTE 2—Substitutes such as aluminum, acrylic, acrylonitrile-
responsibility of the user of this standard to establish appro- butadiene-styrene (ABS), may be substituted for the plates (5.1) and
panels (5.2).
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5.3 Compression Testing Machine, with a cross-head speed
of 50 mm (2 in.)/min and capable of stopping at specified
NOTE 1—There are no ISO standards similar or equivalent to this
settings.
ASTM standard.
1.4 This international standard was developed in accor-
NOTE 3—Load values may differ when determined on screw-type
versus spring-type test machines due to a drift past the desired stop in the
dance with internationally recognized principles on standard-
spring-type machine. It may be necessary to use shims to obtain the
ization established in the Decision on Principles for the
desired stop.
Development of International Standards, Guides and Recom-
5.4 Recorder, for recording compression loads in newtons
mendations issued by the World Trade Organization Technical
(or pounds-force).
Barriers to Trade (TBT) Committee.
5.5 Stop Watch, measuring in minutes and seconds.
2. Referenced Documents
5.6 Gage or Rule, capable of measuring tape thickness to
2
2.1 ASTM Standards:
0.025 mm or 0.001 in.
C717 Terminology of Building Seals and Sealants
6. Test Specimen and Sample
3. Terminology
6.1 Conditioning:
3.1 Definitions—For definitions of terms used in this test
6.1.1 Condition the specimens for 24 h at standard condi-
method, refer to Terminology C717, standard conditions.
tions.
6.1.2 Other conditioning parameters may be included as
4. Significance and Use
desired.
4.1 Tape sealants are tacky, deformable solids used under
6.2 Samples to be tested shall be taken from a roll or tape
compression between two or more surfaces of similar or
sealant after first removing and discarding approximately the
dissimilar materials in a variety of sealing applications. This
first 0.6 m (2 ft) of the roll.
6.3 Tapesealantconfigurationshouldbeapproximately9.53
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
by 9.53 by 76.2 mm (0.375 by 0.375 by 3 in.). The sample
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
General Test Methods.
should be re-extruded rather than plied to conform to the
CurrenteditionapprovedJune1,2018.PublishedJuly2018.Originallyapproved
specified size if the sample does not approximate these
in 1982. Last previous edition approved in 2011 as C972 – 00 (2011). DOI:
dimensions.
10.1520/C0972-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.4 Total tape volume (V) should be calculated (width by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
length by thickness) for determination of tape sealant compres-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. sion index.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C972 − 18
6.5 Prepare two test specimens for each sample as follows: where:
6.5.1 Do not clean or unnecessarily handle the surfaces of
R = free recovery height after 2 h, and
2
surface-treated or painted plate or panels.
T = tape thickness after 2 h.
2
6.5.2 Clean plates or panels with detergent or solvent, or
P 5 P/V (3)
c
both.
where:
6.5.3 Place two 76.2 by 9.53 by 9.53-mm (3 by 0.375 by
3 3
0.375-in.) lengths of tape
...
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: C972 − 00 (Reapproved 2011) C972 − 18
Standard Test Method for
1
Compression-Recovery of Tape Sealant
This standard is issued under the fixed designation C972; 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 describes a laboratory procedure for determining compression-recovery characteristics of tape sealant.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—There are no ISO standards similar or equivalent to this ASTM standard.
1.4 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
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology C717., standard conditions.
4. Significance and Use
4.1 Tape sealants are tacky, deformable solids used under compression between two or more surfaces of similar or dissimilar
materials in a variety of sealing applications. This procedure presents an indication of the compression recovery characteristics of
preformed tapes.
5. Apparatus
5.1 Glass Plates, two, each 6.35 by 76.2 by 76.2 mm (0.25 by 3 by 3 in.).
5.2 Steel Panels, two, cold-rolled, each 0.762 by 76.2 by 76.2 mm (0.03 by 3 by 3 in.).
NOTE 2—Substitutes such as aluminum, acrylic, acrylonitrile-butadiene-styrene (ABS), may be substituted for the plates (5.1) and panels (5.2).
5.3 Compression Testing Machine, with a cross-head speed of 50 mm (2 in.)/min and capable of stopping at specified settings.
NOTE 3—Load values may differ when determined on screw-type versus spring-type test machines due to a drift past the desired stop in the spring-type
machine. It may be necessary to use shims to obtain the desired stop.
5.4 Recorder, for recording compression loads in newtons (or pounds-force).
5.5 Stop Watch, measuring in minutes and seconds.
5.6 Gage or Rule, capable of measuring tape thickness to 0.025 mm or 0.001 in.
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 June 1, 2011June 1, 2018. Published August 2011July 2018. Originally approved in 1982. Last previous edition approved in 20062011 as
C972 – 00 (2006).(2011). DOI: 10.1520/C0972-00R11.10.1520/C0972-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 ----------------------
C972 − 18
6. Test Specimen and Sample
6.1 Conditioning:
6.1.1 Condition the specimens for 24 h at 23 6 2°C (73.4 6 3.6°F) and 506 10 % relative humidity.standard conditions.
6.1.2 Other conditioning parameters may be included as desired.
6.2 Samples to be tested shall be taken from a roll or tape sealant after first removing and discarding approximately the first
0.6 m (2 ft) of the roll.
6.3 Tape sealant configuration should be approximately 9.53 by 9.53 by 76.2 mm (0.375 by 0.375 by 3 in.). The sample should
be re-extruded rather than plied to conform to the specified size if the sample does not approximate these dimensions.
6.4 Total tape volume (V) should be calculated (width by length by thickness) for determination of tape sealant compression
index.
6.5 Prepare two test specimens for each sample as follows:
6.5.1 Do not clean or unnecessarily handle the surfaces of surface-trea
...
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