ASTM C488-83(1998)
(Test Method)Standard Test Method for Conducting Exterior Exposure Tests of Finishes for Thermal Insulation
Standard Test Method for Conducting Exterior Exposure Tests of Finishes for Thermal Insulation
SCOPE
1.1 This test method covers out-of-doors exposure testing of finishes that are normally field-applied to thermal insulation which may include joints or joint sealants, or both. Such exposure may be essential prior to the determination of certain physical properties. This test method may also indicate compatibility problems between the joint sealant and the finish as well as the ability of the finish to span a dry joint. This test method is not intended to evaluate mildew resistance, efflorescence, or chemical resistance. Note-For testing free plastic films, see Practice D1435.
1.2 This test method does not prescribe the method of application, test duration, or inspection intervals.
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.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.
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Designation: C 488 – 83 (Reapproved 1998)
Standard Test Method for
Conducting Exterior Exposure Tests of Finishes for Thermal
Insulation
This standard is issued under the fixed designation C 488; 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.
1. Scope 4. Summary of Test Method
1.1 This test method covers out-of-doors exposure testing of 4.1 This test method specifies out-of-doors exposure, under
finishes that are normally field-applied to thermal insulation ambient conditions, of field-applied finishes on thermal insu-
which may include joints or joint sealants, or both. Such lations, utilizing a minimum of three test specimens and one
exposure may be essential prior to the determination of certain control specimen stored indoors.
physical properties. This test method may also indicate com-
5. Significance and Use
patibility problems between the joint sealant and the finish as
well as the ability of the finish to span a dry joint. This test 5.1 Both physical and chemical changes may occur from
weather exposure, and these changes affect performance prop-
method is not intended to evaluate mildew resistance, efflores-
cence, or chemical resistance. erties, service life, and maintenance schedules. For this reason,
tests of properties relating to performance should be made both
NOTE 1—For testing free plastic films, see Practice D 1435.
before and after specific periods of outdoor exposure.
1.2 This test method does not prescribe the method of
5.2 This test method recognizes that differing geographical
application, test duration, or inspection intervals.
locations, environmental conditions, differences between sur-
1.3 This standard does not purport to address all of the
face temperatures and ambient temperatures, and test durations
safety concerns, if any, associated with its use. It is the
may have extremely varied effects upon the test results.
responsibility of the user of this standard to establish appro-
5.3 This test method is to be used for comparative qualita-
priate safety and health practices and determine the applica-
tive testing.
bility of regulatory limitations prior to use.
6. Test Specimens
1.4 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are provided
6.1 A minimum of three test specimens and one control
for information only.
specimen, each having been applied to an insulation base of
minimum dimensions 1 by 6 by 12 in. (25 by 150 by 300 mm),
2. Referenced Documents
shall be prepared. Insulation shall be the same as that which is
2.1 ASTM Standards:
proposed for the application. The control specimen shall be
C 168 Terminology Relating to Thermal Insulating Materi-
stored indoors.
als
6.2 The following types of specimens may be prepared:
D 1435 Practice for Outdoor Weathering of Plastics
6.2.1 Thermal insulation with no joints,
6.2.2 Thermal insulation with dry joints, and
3. Terminlogy
6.2.3 Thermal insulation with joints filled with joint sealant.
3.1 Definitions: Terminology C 168 applies to the terms
6.3 For testing compatibility of sealants with finishes, joints
used in this test method. 1 3
at least 1 in. (25 mm) deep by ⁄16 to ⁄16 in. (2 to 5 mm) wide
by 12 in. (300 mm) long may be cut in the insulation block.
Joints shall be at least 4 in. (100 mm) apart and at least 4 in.
(100 mm) from the edges, parallel to the joint. More than one
This test method is under the jurisdiction of ASTM Committee C-16 on
sealant may be tested with a single finish by varying the sealant
Thermal Insulation and is the direct responsibility of Subcommittee C16.33 on
Thermal Insulation Finishes and Vapor Transmission.
in each successive joint. These individual insulation pieces
Current edition approved Dec. 30, 1983. Published May 1984. Originally
may be adhered with a suitable adhesive to a larger slab of the
published as C 488–62 T. Last previous edition C 488–79.
2 same insulation of dimensions of the desired comp
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