ASTM C603-90(1997)e1
(Test Method)Standard Test Method for Extrusion Rate and Application Life of Elastomeric Sealants
Standard Test Method for Extrusion Rate and Application Life of Elastomeric Sealants
SCOPE
1.1 This test method includes two laboratory procedures for determining the extrusion rate and application life (or "pot life") of elastomeric chemically curing sealants for use in building construction. Note 1-These sealants are supplied with various rheological properties ranging from pourable liquids to nonsagging pastes. Single-component sealants are supplied ready for use upon opening the container, and their rate of cure is determined by the climatic conditions to which they are exposed. Multicomponent sealants are supplied as a base component and a curing agent separately packaged. After mixing the two parts, the sealant is ready for application, and curing begins immediately.
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.
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e1
Designation: C 603 – 90 (Reapproved 1997)
Standard Test Method for
Extrusion Rate and Application Life of Elastomeric
Sealants
This standard is issued under the fixed designation C 603; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Keywords were added editorially in June 1997.
1. Scope 4.2 This test method is not considered a measure of cure
rate.
1.1 This test method covers two laboratory procedures for
determining the extrusion rate and application life (or “pot
5. Apparatus
life”) of elastomeric chemically curing sealants for use in
5.1 Caulking Gun, 177-mL (6-fl oz) capacity, air-powered.
building construction.
5.2 Polyethylene Cartridge, 177-mL (6-fl oz), with the front
NOTE 1—These sealants are supplied with various rheological proper-
end having an inside diameter of 13.76 0.05 mm (0.540 6
ties ranging from pourable liquids to nonsagging pastes. Single-
0.002 in.).
component sealants are supplied ready for use upon opening the container,
5.3 Air Supply, providing 345 kPa (50-psi) pressure and
and their rate of cure is determined by the climatic conditions to which
having the necessary connection fittings for attachment to the
they are exposed. Multicomponent sealants are supplied as a base
air-powered caulking gun.
component and a curing agent separately packaged. After mixing the two
parts, the sealant is ready for application, and curing begins immediately.
5.4 Timing Device (clock or watch), calibrated in seconds.
5.5 500-mL (one-pt) Container.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided for
6. Standard Test Conditions
information only.
6.1 Unless otherwise specified by those authorizing the
1.3 This standard does not purport to address all of the
tests, standard conditions for both tests are room temperature
safety concerns, if any, associated with its use. It is the
of 23 6 2°C (73.4 6 3.6°F) and 50 6 5 % relative humidity.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
7. Procedure
bility of regulatory limitations prior to use.
7.1 Extrusion Rate of Single-Component Sealant—First
condition the unopened container for at least 16 h at standard
2. Referenced Documents
conditions. Then place a sufficient amount of sealant into the
2.1 ASTM Standards:
2 177-mL (6-fl oz) cartridge to fill it completely with the plunger
C 717 Terminology of Building Seals and Sealants
in place, fully retracted. Using no nozzle on the cartridge, gun
3. Terminology the sealant at 345 kPa (50-psi) pressure into the 500-mL (1-pt)
container, measuring the time in seconds required to empty the
3.1 Definitions—For definitions of terms used in test
cartridge.
method, see Terminology C 717.
NOTE 2—When the printed instructions of the sealant manufacturer so
4. Significance and Use
recommended, heat the sealant before extruding it into the container.
4.1 The results obtained by this test method are simply a
7.2 Extrusion Rate or Application Life or both, of Mixed
measure of the time required to extrude a known volume of
Multicomponent Sealant—First condition the unopened con-
sealant through a known orifice under a predetermined pres-
tainers of both sealant and curing agent for at least 16 h at
sure.
standard conditions. Then mix 400 g of the sealant with the
proper amount of curing agent, stirring the mixture by hand for
5 min. Place a sufficient amount of the mixed compound into
This test method is under the jurisdiction of ASTM Committee C-24 on
Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20
the 177
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