ASTM C771-14

Standard Test Method for Weight Loss After Heat Aging of Preformed Tape Sealants

SIGNIFICANCE AND USE
5.1 Preformed tape sealants are tacky, deformable solids that are used under compression between two substrates in a variety of sealing applications. Compared to other types of sealants, that is, gunnable sealants and caulks, sealing tapes are designed to be essentially 100 % solids materials. In use, these tapes are intended to give long service with minimal weight loss or volatility. This procedure will give a measure of the weight loss of a preformed tape sealant after a controlled period of exposure at an elevated temperature.
SCOPE
1.1 This test method covers a laboratory procedure for determining the weight loss after heat aging of preformed tape sealants. Note 1—Test Method C681 describes a weight loss or volatility test for knife-grade glazing compounds.  
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 The subcommittee with jurisdiction is not aware of any similar ISO standard.  
1.4 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2013
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaces: ASTM C771-03(2009) - Standard Test Method for Weight Loss After Heat Aging of Preformed Sealing Tapes
• Effective Date: 01-Jan-2014
• Replaced By: ASTM C771-14(2019) - Standard Test Method for Weight Loss After Heat Aging of Preformed Tape Sealants
• Effective Date: 01-May-2019
• Referred By: ASTM C1281-16(2023) - Standard Specification for Preformed Tape Sealants for Glazing Applications
• Effective Date: 01-Jan-2014

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C771 − 14
Standard Test Method for
1
Weight Loss After Heat Aging of Preformed Tape Sealants
This standard is issued under the fixed designation C771; 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 is weighed again. The difference in weight indicates the
volatile content of the tape sealant.
1.1 This test method covers a laboratory procedure for
determining the weight loss after heat aging of preformed tape
5. Significance and Use
sealants.
5.1 Preformed tape sealants are tacky, deformable solids
NOTE 1—Test Method C681 describes a weight loss or volatility test for
that are used under compression between two substrates in a
knife-grade glazing compounds.
variety of sealing applications. Compared to other types of
1.2 The values stated in acceptable metric units are to be sealants, that is, gunnable sealants and caulks, sealing tapes are
regarded as the standard. The values given in parentheses are designed to be essentially 100 % solids materials. In use, these
for information only. tapes are intended to give long service with minimal weight
loss or volatility. This procedure will give a measure of the
1.3 The subcommittee with jurisdiction is not aware of any
weight loss of a preformed tape sealant after a controlled
similar ISO standard.
period of exposure at an elevated temperature.
1.4 This standard does not purport to address all of the
6. Apparatus
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6.1 Balance, calibrated to weigh specimens to the nearest
priate safety and health practices and determine the applica-
0.01 g.
bility of regulatory limitations prior to use.
6.2 Thin Plates of Aluminum or Other Metal, two, not less
than 51 mm (2 in.) wide by 152 mm (6 in.) long, for each tape
2. Referenced Documents
to be tested.
2
2.1 ASTM Standards:
6.3 Vented Air Circulating Oven, that complies with Speci-
C681 Test Method for Volatility of Oil- and Resin-Based,
fication E145 and is capable of aging samples at 100 6 2°C
Knife-Grade, Channel Glazing Compounds
(212 6 3.6°F).
C717 Terminology of Building Seals and Sealants
E145 Specification for Gravity-Convection and Forced-
7. Sampling
Ventilation Ovens
7.1 Use a fresh roll of preformed tape sealant for testing.
Remove a section of preformed tape sealant approximately 61
3. Terminology
cm (2 ft) long from the roll and discard.
3.1 Definitions—For definitions of terms used in this test
7.2 Remove release paper as required in order to fashion a
method, see Terminology C717.
suitable test specimen.
4. Summary of Test Method
8. Procedure
4.1 The preformed tape sealant to be tested is placed on a
8.1 For each preformed tape sealant to be tested, prepare
tared metal plate and weighed. After heat aging, the specimen two test specimens as follows:
8.1.1 Clean and dry two metal plates, weigh them, and
record the tare weight for each to the nearest 0.01 g.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
8.1.2 Cut the preformed tape sealant into 127-mm (5.0-in.)
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
lengths. Ply strips together to form on each specimen plate a
General Test Methods.
solid block of preformed tape sealant not less than 38 mm (1.5
Current edition approved Jan. 1, 2014. Published January 2014. Originally
in.) wide by 3 mm (0.12 in.) thick by 127 mm (5.0 in.) long.
approved in 1974. Last previous edition approved in 2009 as C771 – 03 (2009).
DOI: 10.1520/C0771-14.
8.1.3 Weigh the plates with the preformed tape sealant on
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
them, subtract the tare weights of the plates; determine and
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
record the initial net weight for each test specimen to the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. nearest 0.01 g.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C771 − 14
8.2 Place both specimens in an air circulating oven preset to 10. Report
100 62°C(212 63.6°F)andconditionthemfor1weekatthis
10.1 Identification of the preformed tape sealant, that is, the
temperature.
name, lot number, and any other identifying characteristics.
8.3 Afterconditioning,removethespecimensfromtheoven 10.2 Report the average of at least two weight loss calcu-
and allow them to cool at room temperature for 1 h.
la
...

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: C771 − 03 (Reapproved 2009) C771 − 14
Standard Test Method for
1
Weight Loss After Heat Aging of Preformed Tape Sealants
This standard is issued under the fixed designation C771; 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 weight loss after heat aging of preformed tape sealants.
NOTE 1—Test Method C681 describes a weight loss or volatility test for knife-grade glazing compounds.
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 The subcommittee with jurisdiction is not aware of any similar ISO standard.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C681 Test Method for Volatility of Oil- and Resin-Based, Knife-Grade, Channel Glazing Compounds
C717 Terminology of Building Seals and Sealants
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
3. Terminology
3.1 Definitions—The—For definitions of the following terms used in this test method are found in method, see Terminology
C717: preformed tape sealant, sealant. .
4. Summary of Test Method
4.1 The preformed tape sealant to be tested is placed on a tared metal plate and weighed. After heat aging, the specimen is
weighed again. The difference in weight indicates the volatile content of the tape sealant.
5. Significance and Use
5.1 Preformed tape sealants are tacky, deformable solids that are used under compression between two substrates in a variety
of sealing applications. Compared to other types of sealants, that is, gunnable sealants and caulks, sealing tapes are designed to
be essentially 100 % solids materials. In use, these tapes are intended to give long service with minimal weight loss or volatility.
This procedure will give a measure of the weight loss of a preformed tape sealant after a controlled period of exposure at an
elevated temperature.
6. Apparatus
6.1 Balance, calibrated to weigh specimens to the nearest 0.01 g.
6.2 Thin Plates of Aluminum or Other Metal, two, not less than 51 mm (2 in.) wide by 152 mm (6 in.) long, for each tape to
be tested.
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 Jan. 1, 2009Jan. 1, 2014. Published March 2009January 2014. Originally approved in 1974. Last previous edition approved in 20032009 as
C771 – 03.C771 – 03 (2009). DOI: 10.1520/C0771-03R09.10.1520/C0771-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 ----------------------
C771 − 14
6.3 Vented Air Circulating Oven, that complies with Specification E145 and is capable of aging samples at 100 6 2°C (212 6
3.6°F).
7. Sampling
7.1 Use a fresh roll of preformed tape sealant for testing. Remove a section of preformed tape sealant approximately 61 cm (2
ft) long from the roll and discard.
7.2 Remove release paper as required in order to fashion a suitable test specimen.
8. Procedure
8.1 For each preformed tape sealant to be tested, prepare two test specimens as follows:
8.1.1 Clean and dry two metal plates, weightweigh them, and record the tare weight for each to the nearest 0.01 g.
8.1.2 Cut the preformed tape sealant into 127-mm (5.0-in.) lengths. Ply strips together to form on each specimen plate a solid
block of preformed tape sealant not less than 38 mm (1.5 in.) wide by 3 mm (0.12 in.) thick by 127 mm (5.0 in.) long.
8.1.3 WeightWeigh the plates with the preformed tape sealant on them, subtract the tare weights of the plates, and plates;
determine and record the initial net weight for eac
...