ASTM C879-98

Standard Test Methods for Release Papers Used With Preformed Tape Sealants

SCOPE
1.1 These test methods cover laboratory procedures for evaluating the release characteristics of a release paper intended to be supplied in direct contact with a preformed tape sealant.
1.2 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.  
1.3 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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-1992
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaced By: ASTM C879-03 - Standard Test Methods for Release Papers Used With Preformed Tape Sealants
• Effective Date: 10-May-2003
• Referred By: ASTM C1281-16(2023) - Standard Specification for Preformed Tape Sealants for Glazing Applications
• Effective Date: 01-Jan-1993
• Referred By: ASTM E1637-98(2017)e1 - Standard Specification for Structural Standing Seam Aluminum Roof Panel Systems
• Effective Date: 01-Jan-1993
• Referred By: ASTM E1514-98(2017)e1 - Standard Specification for Structural Standing Seam Steel Roof Panel Systems
• Effective Date: 01-Jan-1993

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 879 – 98
Standard Test Methods for
Release Papers Used with Preformed Tape Sealants
This standard is issued under the fixed designation C 879; 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.
1. Scope unwound and the release paper is removed from the preformed
tape sealant, there should be no transfer of the preformed tape
1.1 These test methods cover laboratory procedures for
sealant to the release paper, nor any residue left on the paper.
evaluating the release characteristics of a release paper in-
These methods will give a qualitative indication of whether or
tended to be supplied in direct contact with a preformed tape
not the release paper can be removed cleanly from a preformed
sealant.
tape sealant after a controlled exposure period.
1.2 The values stated in metric (SI) units are to be regarded
5.2 Alternative procedures are listed because some pre-
as the standard. The values given in parentheses are provided
formed tape sealants are normally used under field conditions
for information purposes only.
where elevated temperatures can be encountered, while other
1.3 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—The definitions of the following terms used
100+0,−2% relative humidity.
in this test method are found in Terminology C 717: 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.
Duplicate samples are rolled with a standard roller. One sample
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
sealant between two strips of release paper that is supplied with
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
various sealing applications. These tapes are usually supplied
contact.
in roll form with a release paper interlayer. When the roll is
9. Conditioning
These test methods are under the jurisdiction o
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