ASTM C908-00(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:C908–00 (Reapproved2006)
Standard Test Method for
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 bonding properties of the tape. It also provides an indication of
the modulus and tensile strength of the sealant tape composi-
1.1 This test method covers a laboratory procedure for
tion.
determining the yield strength of preformed tape sealants.
1.2 The values stated in acceptable metric units are to be
5. Apparatus
regarded as the standard. The values given in parentheses are
5.1 Glass Plates, two, each 6.35 by 76.2 by 76.2 mm ( ⁄4 by
for information only.
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—Othersubstratessuchasaluminum,acrylic,ABS,etc.,maybe
responsibility of the user of this standard to establish appro- substituted for the plates (5.1) and panels (5.2).
priate safety and health practices and determine the applica-
5.2 Steel Panels, two, cold-rolled, each 0.762 by 76.2 by
bility of regulatory limitations prior to use.
76.2 mm (0.03 by 3 by 3 in.) (Note 2).
5.3 Laboratory Press, or equivalent.
NOTE 1—There are no ISO standards similar or equivalent to this
ASTM standard. 5.4 Tension Testing Machine, or equivalent, with a jaw
separation rate of 25 mm (1 in.)/min.
2. Referenced Documents
5.5 Recorder, for recording the tension load in pascals (or
2.1 ASTM Standards:
pounds-force).
C717 Terminology of Building Seals and Sealants
5.6 Rule.
5.7 Spacers, 5.1 by 5.1 by 76.2 mm (0.20 by 0.20 by 3 in.).
3. Terminology
6. Sampling
3.1 Refer to Terminology C717 for definitions of the fol-
lowing terms used in this test method: adhesive failure; 6.1 Take samples to be tested taken from a fresh roll of tape
cohesive failure; elongation; modulus; primer; substrate; and
sealant after first removing and discarding approximately the
tape sealant.
first 0.61 m (2 ft) of the roll.
6.2 Sealant tape configuration should be 9.53 by 9.53 mm
4. Significance and Use
3 3
( ⁄8 by ⁄8 in.). If the sample does not approximate these
4.1 Tape sealants are tacky, deformable solids that are used
dimensions, the sample should be re-extruded rather than plied
under compression between two or more surfaces of similar or
up to conform to the specified size.
dissimilar materials in a variety of sealing applications. This
7. Test Specimens
procedure is not intended to simulate an actual use condition
but will give some indication of the cohesive and adhesive
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
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
methyl ethyl ketone.
Seals and Sealants and is the direct responsibility of Subcommittee C24.30 on
Adhesion.
NOTE 3—If the steel panels have been painted or prepared with other
Current edition approved Jan. 1, 2006. Published January 2006. Originally
specified surface treatments, omit this cleaning procedure.
approved in 1979. Last previous edition approved in 2000 as C908 – 00. DOI:
NOTE 4—Primers may be used.
10.1520/C0908-00R06.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3 3
7.1.3 Place two 76.2 by 9.53 by 9.53-mm (3 by ⁄8 by ⁄8-in.)
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
lengths of tape on one of the steel plates, located as shown in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Fig. 1, and remove the release paper. Place a spacer outboard
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C908–00 (2006)
FIG. 1 Test Specimens Assembly
of each tape. Place a glass plate ov
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