ASTM D2249-94
(Test Method)Standard Test Method for Predicting the Effect of Weathering on Face Glazing and Bedding Compounds on Metal Sash (Withdrawn 2002)
Standard Test Method for Predicting the Effect of Weathering on Face Glazing and Bedding Compounds on Metal Sash (Withdrawn 2002)
SCOPE
1.1 This test method covers an accelerated procedure for predicting the effect of weathering on adhesion, surface cracking and peeling, deep bead cracking, oil exudation, and wrinkling of face glazing or bedding compounds, or both, intended for exterior use on steel, aluminum, or other metal sash.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The committee with jurisdiction over this standard is not aware of any equivalent standard published by other ASTM committees, ISO or any other standards organizations.
1.4 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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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: D 2249 – 94
Standard Test Method for
Predicting Effect of Weathering on Face Glazing and
Bedding Compounds on Metal Sash
This standard is issued under the fixed designation D 2249; 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 erated weathering unit for a period up to 300 h. Loss of
adhesion, wrinkling, surface cracking and peeling, deep bead
1.1 This test method covers an accelerated procedure for
cracking, and oil exudation are observed and recorded.
predicting the effect of weathering on adhesion, surface crack-
ing and peeling, deep bead cracking, oil exudation, and
5. Significance and Use
wrinkling of face glazing or bedding compounds, or both,
5.1 The effect of accelerated weathering will assist in
intended for exterior use on steel, aluminum, or other metal
judging the quality and predicting the performance of glazing
sash.
compounds. Accelerated weathering devices should not, how-
1.2 The values stated in inch-pound units are to be regarded
ever, be used to predict the exact number of years of service
as the standard. The values given in parentheses are for
life, or the exact type of failure which will occur under all the
information only.
varied conditions encountered in actual use.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
6. Apparatus and Materials
responsibility of the user of this standard to establish appro-
6.1 Accelerated Weathering Unit—Type D as described in
priate safety and health practices and determine the applica-
Practice G 23, plus a 102–18 cycling cam and black panel
bility of regulatory limitations prior to use.
thermometer accessories.
2. Referenced Documents 6.2 Aluminum Muntin Bar/Glass Assembly Parts, two sets,
as illustrated in Fig. 1. It may be necessary to machine muntin
2.1 ASTM Standards:
bars to the desired dimensions.
C 717 Terminology of Building Seals and Sealants
6.3 Putty Knife.
D 1730 Practices for Preparation of Aluminum and
Aluminum-Alloy Surfaces for Painting
7. Sampling
G 23 Practice for Operating Light-Exposure Apparatus
7.1 Thoroughly mix the entire contents of a full, previously
(Carbon-Arc Type) With and Without Water for Exposure
4 unopened container on a clean, nonabsorptive surface, and take
of Nonmetallic Materials
from this the compound to be tested.
3. Terminology
8. Conditioning
3.1 Definitions—Refer to Terminology C 717 for definitions
8.1 Condition the full unopened container, the muntin bar,
of the following terms: adhesive failure (loss of adhesion);
glass, and spacers for at least5hat 73.4 6 3.6°F (23 6 2°C).
bead; bedding; compound; face glazing; glazing; muntin;
rabbet; sight line.
9. Procedure
9.1 Solvent clean the entire assembly thoroughly as de-
4. Summary of Test Method
scribed under Type A of Practices D 1730.
4.1 The test compound is pressed with a knife into a special
9.2 Back Bedding—Force a bead of the conditioned com-
aluminum muntin bar/glass assembly which simulates both
pound into the narrow rectangular channel formed by the glass
face glazing and bedding applications. Each test compound is
and the aluminum as shown in Fig. 1, taking care to ensure that
run in duplicate. The compound is then exposed in an accel-
the compound completely fills the space with no voids.
Remove excess compound and smooth the exposed surface
This test method is under the jurisdiction of ASTM Committee C-24 on
with a few light strokes of the putty knife.
Building Seals and Sealants and is the direct responsibility of Subcommittee C24.12
9.3 Face Glazing—With the glass in place, apply a portion
on Oil and Resin Base Glazing and Caulking Compounds.
Current edition approved April 15, 1994. Published June 1994. Originally
of the thoroughly mixed compound to the wide, triangular
published as D 2249 – 64 T. Last previous edition D 2249 – 89.
section of each of the two test sash assemblies with a putty
Annual Book of ASTM Standards, Vol 04.07.
3 knife, using a maximum of two cut-off strokes and four
Annual Book of ASTM Standards, Vol 02.05.
smoothing strokes. Be sure to force the compound tightly
Annual Book of ASTM Standards, Vol 14.02.
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D 2249
TABLE 1 METRIC EQUIVALENTS
1 3 1 1 3 1 1
in. ⁄16 ⁄8 ⁄4 ⁄2 ⁄4 1 1 ⁄8 1 ⁄2 8 9
mm 1.6 3.2 6.4 12.7 19 25.4 28.6 38 203 229
FIG. 1 Aluminum Muntin Bar/Glass Assembly
against the rabbet to ensure good initial adhesion. a vehicle that cures to a hard, brittle film lacking elasticity. As
9.4 Hang the assemblies in a vertical position in the accel- noted in 9.6, take c
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