ASTM C1643-08
(Test Method)Standard Test Method to Measuring the Post Dispensing Volumetric Expansion of Aerosol Foam Sealants
Standard Test Method to Measuring the Post Dispensing Volumetric Expansion of Aerosol Foam Sealants
SIGNIFICANCE AND USE
Post dispensing volumetric expansion factor F ¯ indicates the ratio of the fully cured foam sealant volume and the 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 uniformly to anticipate the full coverage upon curing.
Post dispensing volumetric expansion factor F ¯ does not predict the performance capability of the foam sealants of the suitability for the intended applications.
This test method is intended to lend guidance in product selection as related to the post dispensing expansion characteristics of the aerosol foam sealants.
This test method recognizes that the results are reflective of controlled laboratory conditions. Post dispensing expansion in field applications may vary according to temperature, humidity, and surfaces that the aerosol foam sealants are in contact with.
SCOPE
1.1 This test method measures the volumetric expansion of aerosol foam sealants after dispensing.
1.2 This test method provides a means for estimating the quantity of initial material required to dispense in order to fill a cavity.
1.3 Aerosol foam sealants are used for a variety of applications intended to reduce airflow through the building envelope.
1.4 This test method applies to two types of single component aerosol foam sealants: polyurethane and latex.
1.5 There are no other known standard test methods to measure aerosol foam sealants post dispensing expansion.
1.6 Values are reported in SI units only. Certain apparatus and supply items are referenced in inch-pound units for purchasing purposes.
1.7 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.
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Standards Content (Sample)
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Designation: C1643 − 08
StandardTest 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 4. Summary of Test Method
1.1 This test method measures the volumetric expansion of 4.1 Procedure A—For single component polyurethane aero-
aerosol foam sealants after dispensing. sol foam sealants.
4.1.1 Aerosol foam sealant is dispensed into aluminum
1.2 This test method provides a means for estimating the
channels.
quantity of initial material required to dispense in order to fill
4.1.2 Post dispensing volumetric expansion is determined
a cavity.
by the volume of the foam expanded from the channel.
1.3 Aerosol foam sealants are used for a variety of applica-
4.1.3 Post dispensing volumetric expansion factor is calcu-
tions intended to reduce airflow through the building envelope.
lated by measuring the volumetric displacement of the cured
foam.
1.4 This test method applies to two types of single compo-
nent aerosol foam sealants: polyurethane and latex.
4.2 Procedure B—For single component latex aerosol foam
sealants.
1.5 There are no other known standard test methods to
measure aerosol foam sealants post dispensing expansion. 4.2.1 Aerosol foam sealant is dispensed onto aluminum
panels.
1.6 Values are reported in SI units only. Certain apparatus
4.2.2 Post dispensing volumetric expansion is measured by
and supply items are referenced in inch-pound units for
the change of the foam height.
purchasing purposes.
4.2.3 Post dispensing volumetric expansion factor is calcu-
1.7 This standard does not purport to address all of the
lated by measuring the height of the foam.
safety concerns, if any associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
¯
5.1 Post dispensing volumetric expansion factor F indicates
bility of regulatory limitations prior to use.
the ratio of the fully cured foam sealant volume and the
initially dispensed foam sealant volume. For example, if the
2. Referenced Documents
¯
expansion factor F were 2, the fully cured foam would double
2.1 ASTM Standards:
its initial volume; therefore, one should fill 50 % of the cavity
C717 Terminology of Building Seals and Sealants
uniformly to anticipate the full coverage upon curing.
C1620 Specification for Aerosol Polyurethane and Aerosol
¯
5.2 Post dispensing volumetric expansion factor F does not
Latex Foam Sealants
predict the performance capability of the foam sealants of the
3. Terminology
suitability for the intended applications.
3.1 Definitions:
5.3 This test method is intended to lend guidance in product
3.1.1 Refer to Terminology C717 for definitions of the
selection as related to the post dispensing expansion charac-
following terms used in this test method: aerosol foam sealant,
teristics of the aerosol foam sealants.
post dispensing contraction, post dispensing expansion.
5.4 Thistestmethodrecognizesthattheresultsarereflective
of controlled laboratory conditions. Post dispensing expansion
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
in field applications may vary according to temperature,
Seals and Sealants and is the direct responsibility of Subcommittee C24.61 on
humidity, and surfaces that the aerosol foam sealants are in
Aerosol Foam Sealants
contact with.
Current edition approved March 15, 2008. Published April 2008. DOI: 10.1520/
C1643-08.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Apparatus
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Aluminum channels, External dimensions: length =
Standards volume information, refer to the standard’s Document Summary page on
3 3
the ASTM website. 15.25 cm (6 in.), width = 1.91 cm ( ⁄4 in.), height = 1.91 cm ( ⁄4
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1643 − 08
in). Internal dimensions: length = 15.25 cm (6 in.), width = 10. Calculations for Procedure A
1.27 cm (0.5 in.), height = 1.59 cm ( ⁄8 in.). Wall thickness =
10.1 Calculate the post dispensing volumetric expansion
0.32 cm ( ⁄8 in).
factor (F) for each specimen:
6.2 Aluminum panel, 22.86 by 7.62 cm (9 by 3 in.) by 0.06
F 5 Final foam volume/Initial foam volume
cm (0.025 in.).
5 V 2 500 2 V /V
~ !
Channel Initial Foam
6.3 Digital caliper, accurate to 0.01 mm.
5 V 2 500 2 25 /31
~ !
6.4 Top loading balance, readable to 0.01 g.
5 ~V 2 525!/31 (1)
6.5 Wood tongue depressors.
where:
6.6 Graduated cylinder—1000 mL, with 5 mL increments.
V =25mL
Channel
V =31mL
Initial Foam
7. Test Specimens and Substrates
10.2 Calculate the average post dispensing volumetric ex-
7.1 All sample preparation and test should be done at
¯
pansion factor F for each product test:
standard laboratory conditions of 23 6 2°C and 50 65%
¯
relative humidity. F 5 F/n (2)
(
7.2 Each channel shall be wiped clean with rubbing alcohol
where:
24 h before testing
n = 5 or number of specimens tested per product.
7.3 Polyurethane aerosol foam s
...
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