ASTM C908-15
(Test Method)Standard Test Method for Yield Strength of Preformed Tape Sealants
Standard Test Method for Yield Strength of Preformed Tape Sealants
SIGNIFICANCE AND USE
4.1 Tape sealants are tacky, deformable solids that are used under compression between two or more surfaces of similar or dissimilar materials in a variety of sealing applications. This procedure is not intended to simulate an actual use condition but will give some indication of the cohesive and adhesive bonding properties of the tape. It also provides an indication of the modulus and tensile strength of the sealant tape composition.
SCOPE
1.1 This test method covers a laboratory procedure for determining the yield strength of preformed tape sealants.
1.2 The values stated in acceptable metric 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 and health 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.
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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: C908 − 15
Standard Test Method for
1
Yield Strength of Preformed Tape Sealants
This standard is issued under the fixed designation C908; 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 5. Apparatus
1
1.1 This test method covers a laboratory procedure for 5.1 Glass Plates, two, each 6.35 by 76.2 by 76.2 mm ( ⁄4 by
determining the yield strength of preformed tape sealants. 3 by 3 in.).
1.2 The values stated in acceptable metric units are to be
NOTE 2—Other substrates such as aluminum, acrylic,ABS, etc., may be
substituted for the plates (5.1) and panels (5.2).
regarded as the 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.) (Note 2).
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.3 Laboratory Press, or equivalent.
responsibility of the user of this standard to establish appro-
5.4 Tension Testing Machine, or equivalent, with a jaw
priate safety and health practices and determine the applica-
separation rate of 25 mm (1 in.)/min.
bility of regulatory limitations prior to use.
5.5 Recorder, for recording the tension load in pascals (or
NOTE 1—There are no ISO standards similar or equivalent to this
pounds-force).
ASTM standard.
5.6 Rule.
2. Referenced Documents
5.7 Spacers, 5.1 by 5.1 by 76.2 mm (0.20 by 0.20 by 3 in.).
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants 6. Sampling
6.1 Take samples to be tested taken from a fresh roll of tape
3. Terminology
sealant after first removing and discarding approximately the
3.1 Refer to Terminology C717 for definitions of the fol-
first 0.61 m (2 ft) of the roll.
lowing terms used in this test method: adhesive failure;
6.2 Sealant tape configuration should be 9.53 by 9.53 mm
cohesive failure; elongation; modulus; primer; standard condi-
3 3
( ⁄8 by ⁄8 in.). If the sample does not approximate these
tions; substrate; and tape sealant.
dimensions, the sample should be re-extruded rather than plied
up to conform to the specified size.
4. Significance and Use
4.1 Tape sealants are tacky, deformable solids that are used
7. Test Specimens
under compression between two or more surfaces of similar or
7.1 Prepare two test specimens per sample as follows:
dissimilar materials in a variety of sealing applications. This
7.1.1 Clean the glass plates with a suitable solvent, such as
procedure is not intended to simulate an actual use condition
methyl ethyl ketone.
but will give some indication of the cohesive and adhesive
7.1.2 Clean the steel plates with a suitable solvent, such as
bonding properties of the tape. It also provides an indication of
methyl ethyl ketone.
the modulus and tensile strength of the sealant tape composi-
NOTE 3—If the steel panels have been painted or prepared with other
tion.
specified surface treatments, omit this cleaning procedure.
NOTE 4—Primers may be used.
1 3 3
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
7.1.3 Place two 76.2 by 9.53 by 9.53-mm (3 by ⁄8 by ⁄8-in.)
Seals and Sealants and is the direct responsibility of Subcommittee C24.30 on
lengths of tape on one of the steel plates, located as shown in
Adhesion.
Fig. 1, and remove the release paper. Place a spacer outboard
Current edition approved Dec. 1, 2015. Published January 2016. Originally
of each tape. Place a glass plate over the tape to complete the
approved in 1979. Last previous edition approved in 2011 as C908–00(2011). DOI:
10.1520/C0908-15.
test specimen assembly in accordance with Fig. 1.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1.4 Compress the assembly at 51 mm (2 in.)/min by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
meansofalaboratorypress,orequivalent,untilthetapesealant
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. thickness is 5.1 mm (0.20 in.), and maintain this compression
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C908 − 15
FIG. 1 Test Specimens Assembly
mode for 1 min.At the end of 1 min raise the press and remove
the assembly, taking care not to disturb it.
8. Conditioning
8.1 Condition the specimens for 24 h at standard conditions.
8.
...
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: C908 − 00 (Reapproved 2011) C908 − 15
Standard Test Method for
1
Yield Strength of Preformed Tape Sealants
This standard is issued under the fixed designation C908; 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 a laboratory procedure for determining the yield strength of preformed tape sealants.
1.2 The values stated in acceptable metric 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 and health 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
3. Terminology
3.1 Refer to Terminology C717 for definitions of the following terms used in this test method: adhesive failure; cohesive failure;
elongation; modulus; primer; standard conditions; substrate; and tape sealant.
4. Significance and Use
4.1 Tape sealants are tacky, deformable solids that are used under compression between two or more surfaces of similar or
dissimilar materials in a variety of sealing applications. This procedure is not intended to simulate an actual use condition but will
give some indication of the cohesive and adhesive bonding properties of the tape. It also provides an indication of the modulus
and tensile strength of the sealant tape composition.
5. Apparatus
1
5.1 Glass Plates, two, each 6.35 by 76.2 by 76.2 mm ( ⁄4 by 3 by 3 in.).
NOTE 2—Other substrates such as aluminum, acrylic, ABS, etc., may be substituted for the plates (5.1) and panels (5.2).
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).
5.3 Laboratory Press, or equivalent.
5.4 Tension Testing Machine, or equivalent, with a jaw separation rate of 25 mm (1 in.)/min.
5.5 Recorder, for recording the tension load in pascals (or pounds-force).
5.6 Rule.
5.7 Spacers, 5.1 by 5.1 by 76.2 mm (0.20 by 0.20 by 3 in.).
6. Sampling
6.1 Take samples to be tested taken from a fresh roll of tape sealant after first removing and discarding approximately the first
0.61 m (2 ft) of the roll.
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.30 on Adhesion.
Current edition approved Dec. 1, 2011Dec. 1, 2015. Published January 2012January 2016. Originally approved in 1979. Last previous edition approved in 20062011 as
C908–00(2006).C908–00(2011). DOI: 10.1520/C0908-00R11.10.1520/C0908-15.
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 ----------------------
C908 − 15
3 3
6.2 Sealant tape configuration should be 9.53 by 9.53 mm ( ⁄8 by ⁄8 in.). If the sample does not approximate these dimensions,
the sample should be re-extruded rather than plied up to conform to the specified size.
7. Test Specimens
7.1 Prepare two test specimens per sample as follows:
7.1.1 Clean the glass plates with a suitable solvent, such as methyl ethyl ketone.
7.1.2 Clean the steel plates with a suitable solvent, such as methyl ethyl ketone.
NOTE 3—If the steel panels have been painted or prepared with other specified surface treatments, omit this cleaning procedure.
NOTE 4—Primers may be used.
3 3
7.1.3 Place two 76.2 by 9.53 by 9.53-mm (3 by ⁄8 by ⁄8-in.) lengths of tape on one of the steel plates, located as shown in Fig.
1, and remove the release paper. Place a spacer outboard of each tape. Place a glass plate over the tape to complete the test
specimen assembly in accordance with Fig. 1.
7.1.4 Compress the assembly at 51 mm (2 in.)/min by means of a laboratory press, or equivalent, until the tape sealant thickness
is 5.1 mm (0.20 in.), and maintain this comp
...
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