ASTM C1643-14(2020)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1643 − 14 (Reapproved 2020)
Standard Test Method to
Measuring the Post Dispensing Volumetric Expansion of
Aerosol Foam Sealants
This standard is issued under the fixed designation C1643; 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 C1620 Specification for Aerosol Polyurethane and Aerosol
Latex Foam Sealants
1.1 This test method measures the volumetric expansion of
aerosol foam sealants after dispensing.
3. Terminology
1.2 This test method provides a means for estimating the
3.1 Definitions:
quantity of initial material required to dispense in order to fill
3.1.1 Refer to Terminology C717 for definitions of the
a cavity.
following terms used in this test method: aerosol foam sealant,
post dispensing contraction, post dispensing expansion, and
1.3 Aerosol foam sealants are used for a variety of applica-
standard conditions.
tions intended to reduce airflow through the building envelope.
1.4 This test method applies to two types of single compo-
4. Summary of Test Method
nent aerosol foam sealants: polyurethane and latex.
4.1 Procedure A—For single component polyurethane aero-
1.5 There are no other known standard test methods to
sol foam sealants.
measure aerosol foam sealants post dispensing expansion.
4.1.1 Aerosol foam sealant is dispensed into aluminum
channels.
1.6 Values are reported in SI units only. Certain apparatus
4.1.2 Post dispensing volumetric expansion is determined
and supply items are referenced in inch-pound units for
by the volume of the foam expanded from the channel.
purchasing purposes.
4.1.3 Post dispensing volumetric expansion factor is calcu-
1.7 This standard does not purport to address all of the
lated by measuring the volumetric displacement of the cured
safety concerns, if any, associated with its use. It is the
foam.
responsibility of the user of this standard to establish appro-
4.2 Procedure B—For single component latex aerosol foam
priate safety, health, and environmental practices and deter-
sealants.
mine the applicability of regulatory limitations prior to use.
1.8 This international standard was developed in accor- 4.2.1 Aerosol foam sealant is dispensed onto aluminum
panels.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.2.2 Post dispensing volumetric expansion is measured by
the change of the foam height.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 4.2.3 Post dispensing volumetric expansion factor is calcu-
lated by measuring the height of the foam.
Barriers to Trade (TBT) Committee.
5. Significance and Use
2. Referenced Documents
¯
5.1 Post dispensing volumetric expansion factor F indicates
2.1 ASTM Standards:
the ratio of the fully cured foam sealant volume and the
C717 Terminology of Building Seals and Sealants
initially dispensed foam sealant volume. For example, if the
¯
expansion factor F were 2, the fully cured foam would double
its initial volume; therefore, one should fill 50 % of the cavity
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
uniformly to anticipate the full coverage upon curing.
Seals and Sealants and is the direct responsibility of Subcommittee C24.61 on
Aerosol Foam Sealants ¯
5.2 Post dispensing volumetric expansion factor F does not
Current edition approved May 1, 2020. Published June 2020. Originally
predict the performance capability of the foam sealants of the
approved in 2008. Last previous edition approved in 2014 as C1643-14. DOI:
suitability for the intended applications.
10.1520/C1643-14R20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 This test method is intended to lend guidance in product
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
selection as related to the post dispensing expansion charac-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. teristics of the aerosol foam sealants.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1643 − 14 (2020)
5.4 Thistestmethodrecognizesthattheresultsarereflective 9.6 Allow foam specimens to cure for 24 h at standard
of controlled laboratory conditions. Post dispensing expansion conditions.
in field applications may vary according to temperature,
9.7 Fill a 1000 mL graduated cylinder with 500 mL tap
humidity, and surfaces that the aerosol foam sealants are in
water. Carefully immerse one cured foam specimen in the
contact with.
cylinder. Record to the nearest millilitre as V. Repeat for each
foam specimen.
6. Apparatus
10. Calculations for Procedure A
6.1 Aluminum channels, External dimensions: length =
3 3
15.25 cm (6 in.), width = 1.91 cm ( ⁄4 in.), height = 1.91 cm ( ⁄4
10.1 Calculate the post dispensing volumetric expansion
in). Internal dimensions: length = 15.25 cm (6 in.), width =
factor (F) for each specimen:
1.27 cm (0.5 in.), height = 1.59 cm ( ⁄8 in.). Wall thickness =
F 5 Final foam volume/Initial foam volume
0.32 cm ( ⁄8 in).
5 V 2 500 2 V /V
~ !
Channel Initial Foam
6.2 Aluminum panel, 22.86 by 7.62 cm (9 by 3 in.) by 0.06
5 ~V 2 500 2 25!/31
cm (0.025 in.).
5 V 2 525 /31 (1)
~ !
6.3 Digital caliper, ac
...