ASTM C879-03

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Designation:C879–03
Standard Test Methods for
1
Release Papers Used with Preformed Tape Sealants
This standard is issued under the fixed designation C879; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope various sealing applications. These tapes are usually supplied
in roll form with a release paper interlayer. When the roll is
1.1 These test methods cover laboratory procedures for
unwound and the release paper is removed from the preformed
evaluating the release characteristics of a release paper in-
tape sealant, there should be no transfer of the preformed tape
tended to be supplied in direct contact with a preformed tape
sealant to the release paper, nor any residue left on the paper.
sealant.
These methods will give a qualitative indication of whether or
1.2 The values stated in metric (SI) units are to be regarded
notthereleasepapercanberemovedcleanlyfromapreformed
as the standard. The values given in parentheses are provided
tape sealant after a controlled exposure period.
for information purposes only.
5.2 Alternative procedures are listed because some pre-
1.3 The subcommittee with jurisdiction is not aware of any
formed tape sealants are normally used under field conditions
similar ISO standard.
where elevated temperatures can be encountered, while other
1.4 This standard does not purport to address all of the
preformed tape sealants are normally used under more con-
safety concerns associated with its use. It is the responsibility
trolled environments in “assembly line” operations.
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
6. Apparatus and Accessory Materials
limitations prior to use.
6.1 Hard Rubber Roller, weighing 2043 g (4.5 lb), with
2. Referenced Documents approximate dimensions of 82.5-mm (3.25-in.) diameter and
63.5-mm (2.5-in.) width. The rubber surface is 6.4 mm (0.25
2.1 ASTM Standards:
2
in.) thick and has a durometer hardness value of 75 6 5.
C 717 Terminology of Building Seals and Sealants
6.2 Oven, forced-draft, set at 70 6 2°C (158 6 3.5°F) or 50
3. Terminology 6 2°C (122 6 3.5°F).
6.3 Humidity Chamber, set at 41 6 2°C (105 6 3.5°F) and
3.1 Definitions—Thedefinitionsofthefollowingtermsused
100+0,−2% relative humidity.
inthistestmethodarefoundinTerminologyC717:preformed
6.4 Weight, 1000-g (2.2-lb).
tape sealant, sealant.
7. Sampling
4. Summary of Test Method
7.1 Samples to be tested shall be taken from a fresh roll of
4.1 The preformed tape sealant is placed between two strips
preformed tape sealant, after first removing and discarding
of release paper supplied with the preformed tape sealant.
approximately the first 600 mm (2 ft) of the roll.
Duplicatesamplesarerolledwithastandardroller.Onesample
is heat aged in an oven, the other is heat aged in a humidity
8. Test Specimens
chamber. The release paper is peeled off of the preformed tape
8.1 Prepare two test specimens as follows:
sealant either at ambient or elevated temperature. The release
8.1.1 Place a 152-mm (6-in.) length of preformed tape
paper is examined for transfer or residue of the preformed tape
sealantbetweentwostripsofreleasepaperthatissuppliedwith
sealant.
the preformed tape sealant. Apply light finger pressure on the
5. Significance and Use release papers to ensure alignment of the preformed tape
sealant.
5.1 Preformed tape sealants are tacky, deformable solids
8.1.2 Pass the 2043-g (4.5-lb) roller over the length of the
that are used under compression between two substrates in
preformed tape sealant sample three times to ensure adequate
contact.
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These test methods are under the jurisdiction of ASTM Committee C24 on
Building Seals and Sealants and are the direct responsibility of Subcommittee
9. Conditioning
C24.20 on General Sealant Standards.
Current edition approved May 10, 2003. Published June 2003. Originally
9.1 Condition one test specimen for 14 days at 70 6 2°C
approved in 1978. Last previous edition approved in 1998 as C 879–98.
(158 6 3.5°F) in a forced-draft oven.
2
Annual Book of ASTM Standards, Vol 04.07.
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C879–03
FIG. 1 Release Paper Peeling Procedure
9.1.1 Condition the duplicate specimen for 14 days at 41 6 11. Report
2°C (1056 3.5°F) and 100 +0,−1 % relative humidity in a
11.1 Report the following information:
constant-humidity chamber.
11.1.1 Identification of the preformed tape sealant, that is,
9.2 Remove the specimens and allow th
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