ASTM C1087-00

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Designation:C1087–00
Standard Test Method for
Determining Compatibility of Liquid-Applied Sealants with
Accessories Used in Structural Glazing Systems
This standard is issued under the fixed designation C 1087; 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 a laboratory screening proce- 4.1 The test specimens are placed beneath ultraviolet lamps
dure for determining the compatibility of liquid-applied struc- so that the radiation will hit the sealant directly on one
tural sealant glazing sealants when in contact with accessories specimen, and through the glass, on the other specimen (see
such as dry glazing gaskets, spacers, shims, and setting blocks Fig. 1).
after exposure to heat and ultraviolet light. 4.2 The control specimens for this test method are prepared
1.2 This test method includes the observation of three and tested identically to the test specimens except that the
parameters as follows: accessory is eliminated.
1.2.1 Changes in the color of the sealant, 4.3 After the specimens are exposed, the test specimens are
1.2.2 Changes in the adhesion of the sealant to glass, and compared to the control specimens.
1.2.3 Changesintheadhesionofthesealanttotheaccessory 4.4 In the testing of the specimens, any color change in the
being tested. sealant between the test specimen and the control is noted as
1.3 The values stated in SI units are to be regarded as the areanychangesintheadhesionofthesealanttoeithertheglass
standard. The values given in parentheses are for information ortotheaccessory.Thistestmethodrequiresthepreparationof
only. eight test specimens (four controls and four test specimens for
1.4 This standard does not purport to address all of the each accessory being evaluated).
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 In structural sealant glazing systems, the sealant func-
priate safety and health practices and determine the applica-
tions as the structural adhesive and may also function as the
bility of regulatory limitations prior to use.
primary weather seal. As the structural adhesive, the integrity
NOTE 1—At this time, no comparable ISO standard exists.
of the adhesive bond is critical.
5.2 Changes in color and adhesion after exposure are two of
2. Referenced Documents
the criteria that can be used to determine the compatibility of
2.1 ASTM Standards:
the system. Experience has shown that accessories that cause
C 717 Terminology of Building Seals and Sealants
loss of adhesion or discoloration in this test method may also
cause these occurrences in actual use.
3. Terminology
3.1 Definitions—Definitions of the following terms used in
6. Apparatus and Materials
this test method are listed in Terminology C 717: adhesive
6.1 Glass Panels, clear float glass, approximately 76.2 by
failure (adhesion loss), bead, bond breaker, cohesive failure,
50.8 by 6.4 mm (3 by 2 by ⁄4 in.). Eight panels are required for
compatibility, gasket, glazing, sealant, setting blocks, shim,
each material being tested.
spacer, structural sealant, and structural sealant glazing.
6.2 Bond Breaker Tape, 25.4 by 76.2-mm (1 by 3-in.) piece
for each panel.The bond breaker tape must be compatible with
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
the sealants being tested.
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
6.3 Thermometer,forexample,28.9to100°C(20to212°F).
General Test Methods.
Current edition approved Jan. 10, 2000. Published April 2000. Originally
published as C 1087 – 87. Last previous edition C 1087 – 95.
Annual Book of ASTM Standards, Vol 04.07.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C1087–00
7.2 Priortouse,cleantheglassthoroughlywiththecleaning
solvent and dry with a clean rag before the solvent is allowed
to evaporate.
7.3 Place a piece of compatible bond breaker tape to cover
1 in. of the top surface of the glass at one end (see Fig. 3).
7.4 Prepare a total of eight samples (four controls without
accessoryandfourtestspecimenswithaccessory). Cutapiece
of accessory material approximately 6.4 by 51 by 6.4 mm ( ⁄4
by2by ⁄4 in.) and place it on the center of the piece of glass
as shown in Fig. 3. Both the reference sealant and the test
sealant are tested in contact with the accessory.
7.5 Apply a bead of the test sealant on one side of the
accessory and a bead of translucent or light color reference
sealantalongtheothersideoftheaccessory.Toolthesealantso
FIG. 1 Orientation of Test Specimen Under Lamps
that good contact with the glass occurs and the sealant is on top
of the accessory. The thickness of the sealant on top of the
6.4 Ultraviolet (UV) lamps, UVA-340 lamps. accessory shall be approximately 3.2 mm ( ⁄8 in.).
7.6 The control specimens for this test are prepared and
6.5 UV Exposure Apparatus—A suitable UV exposure ap-
paratus will consist of four UVA-340 lamps in a symmetrical tested identically to the test specimens except that the acces-
sory is eliminated.
array situated 254 mm (12 in.) from the surface of the test
specimens (see Fig. 2). The apparatus shall be capable of
8. Conditioning
maintaining a temperature at the test specimens of 48 6 2°C
(118 6 3.6°F). Infrared lamps or other sources of heat may be
8.1 Condition all the specimens for one week at standard
used to maintain the required temperature.
conditions. After conditioning for seven days at standard
6.6 Cleaning Solvent—Any solvent capable of cleaning the
conditions, place two test specimens (with accessory) and two
glass is acceptable (for example, 50/50 mix of isopropyl
control specimens (without accessory) with glass side down,
alcohol and distilled water).
and place two test specimens (with accessory) and two control
6.7 Test Sealant, an appropriate amount of the sealant to be
specimens (without accessory) with glass side up, under the
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