ASTM C731-15

Standard Test Method for Extrudability, After Package Aging, of Latex Sealants

SIGNIFICANCE AND USE
5.1 Extrudability measurements of latex sealants serve to indicate only their ease of application; they do not predict the performance capability of the compound after installation.  
5.2 This test method also measures freeze-thaw and heat stability of such sealants.
SCOPE
1.1 This test method covers a laboratory procedure for the determination of extrudability of latex sealants after freeze-thaw and heat cycling.  
1.2 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety problems, 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: Currently there is no ISO standard similar to this test method.

General Information

• Status: Historical
• Publication Date: 31-May-2015
• ICS: 91.100.50 - Binders. Sealing materials
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C731 − 15
Standard Test Method for
1
Extrudability, After Package Aging, of Latex Sealants
This standard is issued under the fixed designation C731; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 5.2 This test method also measures freeze-thaw and heat
stability of such sealants.
1.1 This test method covers a laboratory procedure for the
determination of extrudability of latex sealants after freeze-
6. Apparatus
thaw and heat cycling.
6.1 Caulking Gun, air-powdered.
1.2 The values stated in metric (SI) units are to be regarded
as the standard. The values given in parentheses are for 6.2 Polyethylene Cartridge, 6 fluid oz. and plunger.
information only. 1
6.3 Polyethylene Cartridge Nozzle, 64 mm (2 ⁄2 in.) in
1
1.3 This standard does not purport to address all of the
length with 3-mm ( ⁄8-in.) orifice.
safety problems, if any, associated with its use. It is the
6.4 Air Compressor, capable of producing 0.34 MPa (50
responsibility of the user of this standard to establish appro-
psi).
priate safety and health practices and determine the applica-
6.5 Freezer, capable of maintaining−17 6 1°C (0 6 2°F).
bility of regulatory limitations prior to use.
6.6 Circulating Air Oven, capable of maintaining 50 6 1°C
NOTE 1—Currently there is no ISO standard similar to this test method.
(122 6 2°F).
2. Referenced Documents
6.7 Stop Watch, standard laboratory.
2
2.1 ASTM Standards:
6.8 Analytical Balance, accurate to 1 g.
C717Terminology of Building Seals and Sealants
6.9 Jar, approximately 0.5 L (1-pt).
3. Terminology
6.10 Spatula.
3.1 Definitions: Refer to Terminology C717 for definitions
7. Sampling
of the following terms used in this test method: latex sealant,
sealant, standard conditions.
7.1 Afterconditioningasspecifiedin8.1,takethesealantto
betesteddirectlyfromacontainerascommerciallysuppliedby
4. Summary of Test Method
the manufacturer.
4.1 After being subjected to 5 freeze-thaw cycles followed
by 7 days of heat aging, the sealant is extruded under pressure
8. Conditioning
from an air-powered caulking gun, and the extrudability is
8.1 Subject the sealant in its original container to 5 freeze-
measured in grams per second.
thaw cycles, each cycle consisting of 16 h at−176 1°C (0 6
2°F) and8hat23 6 1°C (73.46 2°F), followed by 7 days at
5. Significance and Use
50 6 1°C (122 6 2°F).
5.1 Extrudability measurements of latex sealants serve to
8.2 Condition the sealant which is still in its original
indicate only their ease of application; they do not predict the
container, for a minimum of 5 days at standard conditions.
performance capability of the compound after installation.
8.3 Condition the polyethylene cartridge for a minimum of
16 h at standard conditions.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
9. Procedure
General Test Methods.
CurrenteditionapprovedJune1,2015.PublishedJuly2015.Originallyapproved
9.1 After conditioning, transfer the sealant from its con-
in 1972. Last previous edition approved in 2010 as C731–00(2010). DOI:
tainerintothepolyethylenecartridgeeitherbygunningorwith
10.1520/C0731-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org,
...

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: C731 − 00 (Reapproved 2010) C731 − 15
Standard Test Method for
1
Extrudability, After Package Aging, of Latex Sealants
This standard is issued under the fixed designation C731; 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 the determination of extrudability of latex sealants after freeze-thaw and
heat cycling.
1.2 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are for information
only.
1.3 This standard does not purport to address all of the safety problems, 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—Currently there is no ISO standard similar to this test method.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
3. Terminology
3.1 Definitions: Refer to Terminology C717 for definitions of the following terms used in this test method: latex sealant,
sealant. sealant, standard conditions.
4. Summary of Test Method
4.1 After being subjected to 5 freeze-thaw cycles followed by 7 days of heat aging, the sealant is extruded under pressure from
an air-powered caulking gun, and the extrudability is measured in grams per second.
5. Significance and Use
5.1 Extrudability measurements of latex sealants serve to indicate only their ease of application; they do not predict the
performance capability of the compound after installation.
5.2 This test method also measures freeze-thaw and heat stability of such sealants.
6. Apparatus
6.1 Caulking Gun, air-powdered.
6.2 Polyethylene Cartridge, 6 fluid oz. and plunger.
1 1
6.3 Polyethylene Cartridge Nozzle, 64 mm (2 ⁄2 in.) in length with 3-mm ( ⁄8-in.) orifice.
6.4 Air Compressor, capable of producing 50 psi (0.34 MPa).0.34 MPa (50 psi).
6.5 Freezer, capable of maintaining − 17 6 1°C (0 6 2°F).
6.6 Circulating Air Oven, capable of maintaining 50 6 1°C (122 6 2°F).
6.7 Stop Watch, standard laboratory.
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 Dec. 1, 2010June 1, 2015. Published January 2011 July 2015. Originally approved in 1972. Last previous edition approved in 20062010 as
C731 – 00(2006).(2010). DOI: 10.1520/C0731-00R10.10.1520/C0731-15.
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

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C731 − 15
6.8 Analytical Balance, accurate to 1 g.
6.9 Jar, approximately 0.5 L (1-pt).
6.10 Spatula.
7. Sampling
7.1 After conditioning as specified in 8.1, take the sealant to be tested directly from a container as commercially supplied by
the manufacturer.
8. Conditioning
8.1 Subject the sealant in its original container to 5 freeze-thaw cycles, each cycle consisting of 16 h at − 176 1°C (0 6 2°F)
and 8 h at 23 6 1°C (73.46 2°F), followed by 7 days at 50 6 1°C (122 6 2°F).
8.2 Condition the sealant which is still in its original container, for a minimum of 5 days at 23 6 1°C (73.4 6 2°F) and 50 6
5 % relative humidity.standard conditions.
8.3 Condition the polyethylene cartridge for a minimum of 16 h at the same conditions as specified in standard conditions.8.2.
9. Procedure
9.1 After conditioning, transfer the sealant from its container into the polyethylene cartridge either by gunning or with the
spatula. Avoid trapping air in the sealant during transfer.
9.2 Place the filled cartridge in the air-powered caulking gun and attach the cartridge nozzle.
9.3 Weigh the jar and record its tare weight.
9.4 Gun the entire contents of the cartridge at 0.34 MPa (50 psi) into the empty, tared, jar, using a stop watch to time the
extrusion.
9.5 Weigh the jar containing the sealant.
10. Calculation
10.1 Calculate the weight of sealant extruded by su
...