ASTM C639-95

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 639 – 95
Standard Test Method for
Rheological (Flow) Properties of Elastomeric Sealants
This standard is issued under the fixed designation C 639; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope chemically curing sealants, compound, elastomeric, flow
(slump), non-sag sealant (non-slump), sealant, self-leveling
1.1 This test method describes a laboratory procedure for
sealant (flowable).
the determination of rheological (flow) properties of single-
and multicomponent chemically curing sealants for use in
4. Significance and Use
building construction.
4.1 The results obtained from this test method are simply a
1.2 Other suitable flow characteristics may be agreed upon
measure of the degree of horizontal or vertical flow of
between the seller and purchaser or specifier. Special nonsag
single-component or multi-component sealants when applied
properties and lower flow characteristics may be required for
to a set joint configuration at two pre-determined temperatures.
use in sloping joints where absolute leveling is not desired.
Only samples conditioned at the same temperature may be
NOTE 1—The sealants are supplied in various rheological properties
directly compared.
ranging from pourable fluids to stiff nonsagging pastes. Multicomponent
sealants are supplied as a base component with an activator or curing
5. Apparatus
agent separately packaged. After mixing the two parts, the sealant is ready
5.1 Refrigerator, controlled at 4.4 6 2°C (40 6 3.6°F).
for application. Single-component sealants are supplied ready for use
5.2 Oven, convention-type, controlled at 50 6 2°C (1226
upon opening of the package and usually depend on the external
environment for cure. 3.6°F).
5.3 Channel, one, stainless steel (Type 304, No. 2-B finish,
1.3 This test method describes four types of joint sealants:
No. 16 gage), inside dimensions 19 mm wide, 13 mm deep,
1.3.1 Type I—Single-component flowable or self-leveling,
3 1
152 mm long ( ⁄4 by ⁄2 by 6 in.), and closed at both ends (see
1.3.2 Type II—Single-component nonsag,
Fig. 1a).
1.3.3 Type III—Multicomponent flowable or self-leveling,
5.4 Channels, two, stainless steel (Type 304, No. 2-B finish,
and
No. 16 gage), inside dimensions 19 mm wide, 13 mm deep,
1.3.4 Type IV—Multicomponent nonsag.
3 1
152 mm long ( ⁄4 by ⁄2 by 6 in.) with both ends open and the
1.4 The values stated in SI units are to be regarded as the
back surface extended 51 mm (2 in.) (see Fig. 1b).
standard. The values given in parentheses are for information
only.
6. Standard Test Conditions
1.5 This standard does not purport to address the safety
6.1 Unless otherwise specified, standard conditions shall be
problems associated with its use. It is the responsibility of the
23 6 2°C (73.4 6 3.6°F) and 50 6 5 % relative humidity.
user of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
7. Procedures
tions prior to use.
7.1 Test for Type I Sealants:
7.1.1 Clean the closed-end channel (Fig. 1a) with methyl
2. Referenced Documents
ethyl ketone or similar solvent followed by a thorough cleaning
2.1 ASTM Standards:
2 with a detergent solution and a final rinse with distilled or
C 717 Terminology of Building Seals and Sealants
deionized water, and then air dry.
3. Terminology 7.1.2 Before preparing the test assembly, condition at least
100 g of the compound under test in the unopened container for
3.1 Definitions—Refer to Terminology C 717, Section 4.1,
at least 16 h at standard conditions. Then condition the
for definitions of the following terms used in this standard:
compound for 16 to 24 h and the channel for2hina
refrigerator held at 4.4 6 2°C (40 6 3.6°F). At the end of the
This test method is under the jurisdiction of ASTM Committee C-24 on
conditioning periods, pour the compound into the conditioned
Building Seals and Sealants and is the direct responsibility of Subcommittee C24.32
channel held horizontally at the latter temperature and maintain
on Chemically Curing Sealants.
Current edition approved April 15, 1995. Published June 1995. Originally
the test specimen at this temperature for 4 h. At the end of this
published as C 639 – 69. Last previous edition C 639 – 90.
period, examine the compound for flow properties.
Annual Book of ASTM Standards, Vol 04.07.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
C 639
After conditioning the base and curing agent separately for 16
to 24 h and the channel for2hinthe refrigerator, remove and
hand mix them for at least 5 min. Return the
...