1、Designation: C1184 18Standard Specification forStructural Silicone Sealants1This standard is issued under the fixed designation C1184; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthes
2、es indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification describes the properties of cold liquidapplied, single-component or multicomponent, chemically cur-ing elastomeric structural silicone
3、sealants herein referred to asthe sealant. These sealants are intended to structurally adherecomponents of structural sealant glazing systems.1.2 Only those properties for which there are industry-agreed-upon minimum acceptable requirements, as determinedby available ASTM test methods, are described
4、 in this speci-fication. Additional properties may be added as ASTM testmethods for those properties become available.1.3 The values stated in metric (SI) units are to be regardedas the standard. The values in parentheses are for informationonly.1.4 Committee C24, with jurisdiction over thisspecific
5、ation, is aware of two comparable standards by otherorganizations: ETAG No. 002 and the Chinese national stan-dard GB16776.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDeve
6、lopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C603 Test Method for Extrusion Rate and Application Lifeof Elastomeric SealantsC639 Test Method for Rheological
7、 (Flow) Properties ofElastomeric SealantsC661 Test Method for Indentation Hardness of Elastomeric-Type Sealants by Means of a DurometerC679 Test Method for Tack-Free Time of Elastomeric Seal-antsC717 Terminology of Building Seals and SealantsC792 Test Method for Effects of HeatAging onWeight Loss,Cr
8、acking, and Chalking of Elastomeric SealantsC794 Test Method forAdhesion-in-Peel of Elastomeric JointSealantsC1087 Test Method for Determining Compatibility ofLiquid-Applied Sealants with Accessories Used in Struc-tural Glazing SystemsC1135 Test Method for Determining TensileAdhesion Prop-erties of
9、Structural SealantsC1401 Guide for Structural Sealant GlazingC1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use Laboratory Light SourcesG154 Practice for Operating Fluorescent Ultra
10、violet (UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 European Organization for Technical Approvals Docu-ment:3ETAG No. 002 Guideline for European Technical Approvalfor Structural Sealant Glazing
11、Systems2.3 Chinese National Standard:4GB 167761997 Structural Silicone Sealants for Building3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof the following terms used in this specification: adhesivefailure, chemically curing sealant, cohesive failure,compatibility, cure, elast
12、omeric, glazing, hardness, non-sagsealant, primer, sealant, shelf-life, silicone sealant, structuralsealant, standard conditions, substrate, and tooling.4. Significance and Use4.1 Not all sealants meeting this specification should bepresumed to be suitable for all applications and all substrates.Thi
13、s specification assists in selecting sealants that meet certainminimum standards of performance.1This specification is under the jurisdiction of ASTM Committee C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.10on Specifications, Guides and Practices.Current edi
14、tion approved June 1, 2018. Published July 2018. Originally approvedin 1991. Last previous edition approved in 2014 as C1184 14. DOI: 10.1520/C1184-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStan
15、dards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from www.eota.be4Published May 15, 2005, Implemented August 1, 1997; http:/ ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international s
16、tandard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.
17、2 Although this specification qualifies a sealant for use, itdoes not address the adhesion capability of the sealant for aspecific substrate nor the compatibility of the sealant with thematerials it contacts. Adhesion and compatibility characteris-tics required for specific substrates or finishes ca
18、n be deter-mined by Test Method C794 for adhesion and Test MethodC1087 for compatibility.4.3 To properly specify a sealant for the intended use whenusing this specification, it is essential that the applicable typeand use be included.5. Classification of Sealants5.1 A sealant qualifying under this s
19、pecification shall beclassified as to type and use as given in 4.1.1-4.1.4.5.1.1 Type SSingle-component sealant.5.1.2 Type MMulticomponent sealant.5.1.3 Use GA sealant that meets the requirements of thisspecification when tested on a clear, uncoated float glasssubstrate.5.1.4 Use OA sealant that mee
20、ts the requirements of thisspecification when tested on a substrate other than a clear,uncoated float glass substrate (for example, Use OGranite).6. Materials and Manufacture6.1 Furnish single-component sealants as a homogeneousmixture of a consistency suitable for application. Apply thesealant in a
21、ccordance with the written recommendations of thesealant manufacturer. The cured sealant shall be an elastomericsolid.6.2 Furnish multicomponent sealants in two or more com-ponents. Mix and apply the sealant in accordance with thewritten recommendations of the sealant manufacturer. Thecured sealant
22、shall be an elastomeric solid.6.3 Furnish primer of the type required by, and apply inaccordance with, the written recommendations of the sealantmanufacturer.7. Requirements7.1 The physical, mechanical, and performance propertiesof the sealant shall conform to the requirements described inTable 1.7.
23、2 When a primer (see Note 1) is required by the sealantmanufacturer, all tests performed in accordance with thisspecification shall be performed with the primer. When aprimer is not required by the sealant manufacturer, all testsperformed in accordance with this specification shall beperformed witho
24、ut a primer.NOTE 1The proper use of primers is described in Guide C1401.7.3 The standard substrate for this specification is clear,uncoated float glass.8. Test Methods8.1 Rheological PropertiesTest Method C639, using testprocedures for Type II and IV sealants.8.2 ExtrudabilityTest Method C603.8.3 Ha
25、rdnessTest Method C661, using a TypeA-2 durom-eter.8.4 Heat AgingTest Method C792, using a temperature of88 6 5C (190 6 10F).8.5 Tack-Free TimeTest Method C679.8.6 Tensile AdhesionTest Method C1135, using a rate ofpull of 12.7 mm (12 in.)/min. Determine the average ultimatetensile value for each gro
26、up of five specimens prepared asdescribed in 8.6.1 and 8.6.2.8.6.1 Prepare, in accordance with Test Method C1135,atotal of 25 specimens for testing, except that the distancebetween substrates will be 9.5 mm (38 in.).8.6.2 Cure all specimens for 21 days at standard conditions.Condition and test the s
27、pecimens as described in 8.6.2.1 8.6.2.5.8.6.2.1 Test five specimens at standard conditions after theinitial curing period.8.6.2.2 Condition five specimens for1hat886 5C (1906 10F) in a forced air oven. Test the specimens at 88 6 5C(190 6 10F).8.6.2.3 Condition five specimens for1hat296 2C (206 4F).
28、 Test the specimens at 296 2C (20 6 4F).8.6.2.4 Immerse five specimens in deionized or distilledwater at standard temperature for seven days. Test the speci-mens at standard conditions within 10 min after their removalfrom the water.8.6.2.5 Expose five specimens with the bond surface facingthe light
29、 source to either of the exposure conditions specifiedbelow in apparatus that conforms to the requirements definedin Practice C1442. Because of differences in spectral powerdistribution of the exposure sources (consult G154 and G155)and differences in test parameters, test results may differbetween
30、the two types of tests. Choice of type of exposure shallbe by mutual agreement between the interested parties.NOTE 2Refer to Practice G151 for full cautionary guidance regardinglaboratory weathering of nonmetallic materials.(a) Fluorescent UV/Condensation ApparatusOperate thedevice in accordance wit
31、h the procedure in Practice C1442,Section 7.3 and expose the specimens for a minimum of 5,000h.TABLE 1 Requirements for Physical, Mechanical, andPerformance Qualities of the SealantProperty Requirements Test MethodExtrudability, max 10 s C603Hardness, Shore A 20 to 60 C661Heat Aging C792Weight Loss,
32、 max 10 %Cracking noneChalking noneRheological, max C639Vertical 4.8 mm (316 in.)Horizontal no deformationShelf Life, min 6 months 9.1Tack-free time, max no transfer in 3 h C679Tensile Value, min C1135Standard Conditions: 345 kPa (50 psi)88C (190F) 345 kPa (50 psi)29C (20F) 345 kPa (50 psi)Water Imm
33、ersion 345 kPa (50 psi)A minimum of 5000 h weathering 345 kPa (50 psi) 8.6.2.5C1184 182(b) Xenon Arc Weathering DeviceOperate the device inaccordance with the procedure in C1442, Section 7.2. Exposespecimens for a minimum of 5,000 h at the irradiance level of0.51 W/(m2 nm) at 340 nm. The radiant exp
34、osure is 9180kJ/(m2 nm) at 340 nm. To determine the exposure timerequired to obtain the same radiant exposure at other irradiancelevels specified in Practice C1442, see Annex A1 in PracticeC1442.9. Shelf Life9.1 Shelf-LifeThe shelf-life of this sealant shall be deter-mined by its manufacturer.When e
35、stablishing the shelf-life, themanufacturer should also identify acceptable conditions ofstorage for the sealant.APPENDIX(Nonmandatory Information)X1. STRUCTURAL SILICONE SEALANT MODULUS OF ELASTICITYX1.1 GeneralX1.1.1 The purpose of this appendix is to describe modulusconsiderations for a structura
36、l silicone sealant that is intendedfor a range of applications. Structural silicone sealants shouldbe designed for both strength and flexibility for specificapplications; this implies that the sealants modulus of elastic-ity should fall between a maximum and minimum value for aspecific application.X
37、1.1.2 The modulus of elasticity of a material describes itselongation response to an applied stress, and therefore is ameasure of its flexibility, stiffness, or hardness. The term“modulus” used in this appendix refers to a sealants secantmodulus of elasticity; see Terminology C717. Note that theunit
38、s of modulus and stress can be the same (such as poundsper square inch), but they represent different technical con-cepts. Because the modulus of a sealant is not constant, it iscustomary in the sealant industry to state both the modulus andthe strain at which it was measured (for example, 99 kPa at
39、12.5 % strain).X1.1.3 Structural silicone sealants are used to structurallyattach glass and other materials to a framing system; to transferloads applied to the glazing material to the framing system; andto accommodate anticipated movement between the glazedmaterials and the supporting framework. Wh
40、en selecting astructural sealant for a specific application, the design profes-sional must select a sealant that has the necessary strength toresist applied loads, but also has enough flexibility to accom-modate differential movement.X1.1.4 Currently, structural silicone sealants are manufac-tured t
41、o have performance properties which allow a particularmaterial to be used in a wide variety of applications. If aparticular structural silicone sealant is to be used in a specificapplication, it must have a modulus which is also acceptablefor that application.X1.1.5 The modulus of a sealant may be a
42、 function (essen-tially linear) of temperature. It should be verified that themodulus will fall within the minimum and maximum criteriaover the anticipated service temperature range.X1.1.6 To adequately evaluate a sealant for a specificapplication, a stress/strain plot should be developed for thespe
43、cific project conditions utilizing Test Method C1135. Whendeveloping the stress/strain plot, the test conditions (such assealant joint configuration or environmental conditioning)should be modified to correlate with the conditions specified orpredicted for the specific specification. The application
44、-specificstress/strain plots (developed using the average values for eachset of test assemblies as described in Test Method C1135), incombination with the design criteria for the application, can beevaluated to determine if the proposed sealant is appropriatefor the application.X1.2 Minimum ModulusX
45、1.2.1 The minimum acceptable structural sealant modulus(softest, or highest acceptable flexibility) is based on thepremise that the sealant must be sufficiently stiff to retain thepanel without excessive deflection. The limiting case is whenthe sealant depth is stressed by negative (outward acting)
46、windor other lateral loads up to its design load; even at that stress itmust not elongate beyond the practical limit of the designgeometry (such as the setting blocks supporting the weight ofthe panel).X1.3 Maximum ModulusX1.3.1 The maximum acceptable modulus (hardest, or leastacceptable flexibility
47、) is dictated by the requirement that thestructural sealant joint must have sufficient flexibility to re-spond to the wind strain or differential thermal movementbetween the panel and the supporting framework, withoutbeing stressed in shear in excess of the design parameters.C1184 183ASTM Internatio
48、nal takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their
49、 own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not receiv
