ASTM C1241-14

Standard Test Method for Volume Shrinkage of Latex Sealants During Cure

SIGNIFICANCE AND USE
5.1 Shrinkage of a sealant, after application in a building joint, is caused by loss of volatile components from the sealant. This loss results in a decrease in volume and, hence, a change in the sealant's shape. This change in shape, in some applications, should be taken into consideration for acceptable joint appearance and geometry.  
5.2 The shrinkage value obtained by this test method helps predict the appearance and geometry of the cured sealant in a building joint and is helpful in determining the amount and type of tooling to be done during installation of the sealant.  
5.3 Latex sealants cure primarily through water evaporation. They may also contain small amounts of other volatile components. However, in this test method all volatiles are treated as water. This assumption still provides a meaningful shrinkage value since the small quantities of other volatiles and their differences in density from that of water do not significantly affect the usefulness of the result obtained.
SCOPE
1.1 This test method covers a laboratory procedure for determining volume shrinkage, which occurs during cure, of a latex sealant.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided 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—A related ISO standard is ISO 10563. The user should compare to determine how it differs from this test method.

General Information

• Status: Historical
• Publication Date: 31-Jan-2014
• ICS: 83.040.10 - Latex and raw rubber
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C1241 − 14
Standard Test Method for
1
Volume Shrinkage of Latex Sealants During Cure
This standard is issued under the fixed designation C1241; 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 calculated using the sealant’s density, the percent weight lost
duringthe28-daycure,andthedensityofwater.Thedensityof
1.1 This test method covers a laboratory procedure for
the sealant is determined by the weight-per-gallon cup proce-
determining volume shrinkage, which occurs during cure, of a
dure described in Test Method D1475.
latex sealant.
1.2 The values stated in SI units are to be regarded as the
5. Significance and Use
standard. The values given in parentheses are provided for
5.1 Shrinkage of a sealant, after application in a building
information only.
joint,iscausedbylossofvolatilecomponentsfromthesealant.
1.3 This standard does not purport to address all of the
This loss results in a decrease in volume and, hence, a change
safety concerns, if any, associated with its use. It is the
in the sealant’s shape. This change in shape, in some
responsibility of the user of this standard to establish appro-
applications, should be taken into consideration for acceptable
priate safety and health practices and determine the applica-
joint appearance and geometry.
bility of regulatory limitations prior to use.
5.2 The shrinkage value obtained by this test method helps
NOTE 1—A related ISO standard is ISO 10563. The user should
predict the appearance and geometry of the cured sealant in a
compare to determine how it differs from this test method.
building joint and is helpful in determining the amount and
type of tooling to be done during installation of the sealant.
2. Referenced Documents
2
2.1 ASTM Standards: 5.3 Latex sealants cure primarily through water evapora-
C717 Terminology of Building Seals and Sealants tion. They may also contain small amounts of other volatile
D1475 Test Method For Density of Liquid Coatings, Inks, components. However, in this test method all volatiles are
and Related Products treated as water. This assumption still provides a meaningful
3
2.2 ISO Standards: shrinkagevaluesincethesmallquantitiesofothervolatilesand
ISO 10563 Building Construction–Sealants–Determination their differences in density from that of water do not signifi-
of Change in Mass and Volume cantly affect the usefulness of the result obtained.
3. Terminology
6. Apparatus
3.1 Definitions—Refer to Terminology C717 for definitions
6.1 Polyethylene Film—Three sheets, each about 51 by 51
of the following terms used in this test method: cure, joint,
mm (2 by 2 in.) by 0.127 mm (5 mil) thick.
latex sealant, sealant, shrinkage (volume), and tooling.
6.2 Weight-per-Gallon Cup, 80 to 90 mL capacity.
4. Summary of Test Method
6.3 Constant Temperature Bath or Room, held at 23 6
4.1 The sealant is extruded onto polyethylene release film
2.0°C (73 6 3.6°F).
and weighed.After curing for 28 days, its volume shrinkage is
6.4 Forceps.
6.5 Distilled Water.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
7. Procedure
General Test Methods.
Current edition approved Feb. 1, 2014. Published March 2014. Originally
7.1 Standard Conditions are as defined in Terminology
approved in 1993. Last previous edition approved in 2009 as C1241 – 00(2009).
C717.
DOI: 10.1520/C1241-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.2 Condition the sealant to be tested in a closed container
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on at standard conditions for at least 24 h.
the ASTM website.
3
7.3 Condition approximately 2 L of distilled water at
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036. standard conditions for at least 24 h.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1241 − 14
7.4 Determine the density (D ) in grams per millilitre of W 2 W
f c
s
% Wl 5 3100 (1)
fresh sealant by Test Method D1475. Record the average W
f
density (D ) of three determinations.
s
where:
NOTE 2—It is very important that the volume of the weight-per-gallon
W = net weight of fresh sealant, g (7.7), and
f
cup be accurately determined according to the calibration procedure
W = net weight of sealant after 28 days cured (7.10).
c
descri
...

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: C1241 − 00 (Reapproved 2009) C1241 − 14
Standard Test Method for
1
Volume Shrinkage of Latex Sealants During Cure
This standard is issued under the fixed designation C1241; 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 volume shrinkage, which occurs during cure, of a latex
sealant.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided 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—A related ISO standard is ISO 10563. The user should compare to determine how it differs from this test method.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products
3
2.2 ISO Standards:
ISO 10563 Building Construction–Sealants–Determination of Change in Mass and Volume
3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions of the following terms used in this test method: cure, joint, latex
sealant, sealant, shrinkage (volume), and tooling.
4. Summary of Test Method
4.1 The sealant is extruded onto polyethylene release film and weighed. After curing for 28 days, its volume shrinkage is
calculated using the sealant’s density, the percent weight lost during the 28-day cure, and the density of water. The density of the
sealant is determined by the weight-per-gallon cup procedure described in Test Method D1475.
5. Significance and Use
5.1 Shrinkage of a sealant, after application in a building joint, is caused by loss of volatile components from the sealant. This
loss results in a decrease in volume and, hence, a change in the sealant’s shape. This change in shape, in some applications, should
be taken into consideration for acceptable joint appearance and geometry.
5.2 The shrinkage value obtained by this test method helps predict the appearance and geometry of the cured sealant in a
building joint and is helpful in determining the amount and type of tooling to be done during installation of the sealant.
5.3 Latex sealants cure primarily through water evaporation. They may also contain small amounts of other volatile
components. However, in this test method all volatiles are treated as water. This assumption still provides a meaningful shrinkage
value since the small quantities of other volatiles and their differences in density from that of water do not significantly affect the
usefulness of the result obtained.
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 June 1, 2009Feb. 1, 2014. Published June 2009March 2014. Originally approved in 1993. Last previous edition approved in 20052009 as
C1241 – 00(2005).(2009). DOI: 10.1520/C1241-00R09.10.1520/C1241-14.
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.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1241 − 14
6. Apparatus
6.1 Polyethylene Film—Three sheets, each about 51 by 51 mm (2 by 2 in.) by 0.127 mm (5 mil) thick.
6.2 Weight-per-Gallon Cup, 80 to 90 mL capacity.
6.3 Constant Temperature Bath or Room, held at 23 6 2.0°C (73 6 3.6°F).
6.4 Forceps.
6.5 Distilled Water.
7. Procedure
7.1 Standard conditions of temperature and relative humidityConditions are as defined in Terminology C717for the test shall
be 23 6 2°C (73 6 3.6°F) and 50 6 5 %, respectively.
7.2 Condition the sealant to be tested in a closed container at standard conditions for at least 24 h.
7.3 Condition approxi
...