1、Designation: C647 08 (Reapproved 2013)Standard Guide toProperties and Tests of Mastics and Coating Finishes forThermal Insulation1This standard is issued under the fixed designation C647; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide identifies properties of mastics and coatingfinishes characterizing their performance as f
3、inishes for ther-mal insulation.1.2 These properties relate to application and service. Eachproperty is defined, and its significance and suggested testmethods are described.1.3 The properties appear in the following order in thisguide.ParagraphApplication Properties 6Consistency 6.1Coverage 6.2Buil
4、d 6.3Wet Flammability 6.4Toxicity 6.5Temperature and Humidity Range 6.6Surface Wetting and Adhesion 6.7Gap Filling and Bridging 6.8Sizing and Sealing 6.9Corrosion or Solvent Attack 6.10Drying Time and Curing Time 6.11Shrinkage 6.12Storage Stability 6.13Freeze-Thaw Stability 6.14Service Properties 7S
5、pecimen Preparation 7.1Outdoor Durability 7.2Environmental Resistance 7.3Temperature Limits 7.3.1Chemicals and Water Resistance 7.3.2Mold and Mildew Resistance 7.3.3Surface Flammability 7.4Water-Vapor Transmission Rate 7.5Adhesion 7.6Damage Resistance 7.7Impact Resistance 7.7.1Abrasion Resistance 7.
6、7.2Stress Resistance 7.8Flexure 7.8.1Elongation 7.8.2Color 7.9Odor 7.10Other Properties 81.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered stand
7、ard.2. Referenced Documents2.1 ASTM Standards:2C168 Terminology Relating to Thermal InsulationC419 Practice for Making and Curing Test Specimens ofMastic Thermal Insulation CoatingsC461 Test Methods for Mastics and Coatings Used WithThermal InsulationC488 Test Method for Conducting Exterior Exposure
8、 Testsof Finishes for Thermal InsulationC639 Test Method for Rheological (Flow) Properties ofElastomeric SealantsC681 Test Method for Volatility of Oil- and Resin-Based,Knife-Grade, Channel Glazing CompoundsC733 Test Method for Volume Shrinkage of Latex Sealants(Withdrawn 2000)3C755 Practice for Sel
9、ection of Water Vapor Retarders forThermal InsulationC792 Test Method for Effects of HeatAging on Weight Loss,Cracking, and Chalking of Elastomeric SealantsD36/D36M Test Method for Softening Point of Bitumen(Ring-and-Ball Apparatus)D56 Test Method for Flash Point by Tag Closed Cup TesterD92 Test Met
10、hod for Flash and Fire Points by ClevelandOpen Cup TesterD93 Test Methods for Flash Point by Pensky-MartensClosed Cup TesterD529 Practice for Enclosed Carbon-Arc Exposures of Bitu-minous Materials (Withdrawn 2013)3D543 Practices for Evaluating the Resistance of Plastics toChemical Reagents1This guid
11、e is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved Nov. 1, 2013. Published January 2014. Originallyapproved in 1969. Last previous edition approved in 2008 as C647
12、08). DOI:10.1520/C0647-08R13.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of th
13、is historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1D562 Test Method for Consistency of Paints MeasuringKrebs Unit (KU) Viscosity Using a Stormer-Type Viscom-eterD638 Test Method for Ten
14、sile Properties of PlasticsD658 Test Method for Abrasion Resistance of OrganicCoatings by Air Blast Abrasive (Withdrawn 1996)3D747 Test Method for Apparent Bending Modulus of Plas-tics by Means of a Cantilever BeamD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and E
15、lectrical Insulating Materi-alsD822/D822M Practice for Filtered Open-Flame Carbon-ArcExposures of Paint and Related CoatingsD903 Test Method for Peel or Stripping Strength of Adhe-sive BondsD968 Test Methods for Abrasion Resistance of OrganicCoatings by Falling AbrasiveD1310 Test Method for Flash Po
16、int and Fire Point of Liquidsby Tag Open-Cup ApparatusD1640 Test Methods for Drying, Curing, or Film Formationof Organic Coatings at Room TemperatureD1654 Test Method for Evaluation of Painted or CoatedSpecimens Subjected to Corrosive EnvironmentsD1729 Practice for Visual Appraisal of Colors and Col
17、orDifferences of Diffusely-Illuminated Opaque MaterialsD1823 Test Method for Apparent Viscosity of Plastisols andOrganosols at High Shear Rates by Extrusion ViscometerD1824 Test Method for Apparent Viscosity of Plastisols andOrganosols at Low Shear RatesD1849 Test Method for Package Stability of Pai
18、ntD2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type)ViscometerD2243 Test Method for Freeze-Thaw Resistance of Water-Borne CoatingsD2354 Test Method for Minimum Film Formation Tempera-ture (MFFT) of Emulsion VehiclesD2444 Test Method for Determina
19、tion of the Impact Resis-tance of Thermoplastic Pipe and Fittings by Means of aTup (Falling Weight)D2453 Test Method for Shrinkage and Tenacity of Oil- andResin-Base Caulking CompoundsD2485 Test Methods for Evaluating Coatings For HighTemperature ServiceD2507 Terminology of Rheological Properties of
20、 GelledRocket Propellants (Withdrawn 2003)3D2939 Test Methods for Emulsified Bitumens Used asProtective Coatings (Withdrawn 2012)3D3134 Practice for Establishing Color and Gloss TolerancesD3274 Test Method for Evaluating Degree of Surface Dis-figurement of Paint Films by Fungal or Algal Growth, orSo
21、il and Dirt AccumulationD3361/D3361M Practice for Unfiltered Open-FlameCarbon-Arc Exposures of Paint and Related CoatingsD3828 Test Methods for Flash Point by Small Scale ClosedCup TesterD4339 Test Method for Determination of the Odor ofAdhesivesE84 Test Method for Surface Burning Characteristics of
22、Building MaterialsE96/E96M Test Methods for Water Vapor Transmission ofMaterialsE162 Test Method for Surface Flammability of MaterialsUsing a Radiant Heat Energy SourceE659 Test Method for Autoignition Temperature of LiquidChemicalsG21 Practice for Determining Resistance of Synthetic Poly-meric Mate
23、rials to FungiG23 Practice for Operating Light-Exposure Apparatus(Carbon-Arc Type) With and Without Water for Exposureof Nonmetallic Materials (Withdrawn 2000)33. Terminology3.1 Terminology C168 shall be considered as applying tothe terms used in this specification.3.2 General Definitions:3.2.1 appl
24、ication propertiesproperties that influence oraffect the effective installation of finishes.3.2.2 coatinga liquid or semiliquid protective finish ca-pable of application to thermal insulation or other surfaces,usually by brush or spray, in moderate thickness, 30 mils (0.76mm).3.2.3 mastica protectiv
25、e finish of relatively thick consis-tency capable of application to thermal insulation or othersurfaces usually by spray or trowel, in thick coats greater than30 mils (0.03 in.) (0.76 mm).3.2.4 service propertiesproperties that govern perfor-mance of finishes after installation.3.3 Specific Definiti
26、onsTerms specific to Sections 6 and 7are defined as appropriate.4. Significance and Use4.1 Each of the properties listed should be considered inselecting materials for specific projects. A list of the selectedproperties with limiting values assigned will form a part of theproduct specification.4.2 A
27、ll of the properties may not be pertinent in any specificsituation, and all of the tests outlined may not be required. Acondition to any specification must be an evaluation of theproposed use to determine which properties may be required.4.3 Membrane reinforcements are frequently specified andused w
28、ith mastics and coatings. Service properties of suchsystems of finishes may be different from the unreinforcedfinishes; therefore, it is essential to test specimens of thereinforced system.5. Classification of Mastics and Coatings5.1 Vapor-Retarder TypeA finish intended for service oninsulated units
29、 that are operated below ambient temperature atleast part of the time.NOTE 1Practice C755 may provide additional guidance.5.1.1 Outdoor service.5.1.2 Indoor service.C647 08 (2013)25.2 Vapor-Permeable TypeAfinish intended for service oninsulated units that are operated above ambient temperature.(See
30、7.6.2. Sometimes referred to as a “breather” finish.)5.2.1 Outdoor service.5.2.2 Indoor service.6. Application Properties6.1 Consistency:6.1.1 Definitionthe resistance of a non-Newtonian mate-rial to deformation or flow.NOTE 2Consistency is not a fundamental property but is made up ofviscosity, plas
31、ticity, and other rheological phenomena (see TerminologyD2507). In non-Newtonian behavior, usual for mastics and coatings forthermal insulation, the ratio of shearing stress to the rate of shearing strainvaries with the shearing stress.6.1.2 Significance and UseConsistency determineswhether a mastic
32、 or coating can be troweled, applied by glovedhand, brushed, or sprayed. It has a direct effect on applicationcosts.6.1.3 Technical EvaluationTest Methods C461, C639,D562, D1823, D1824, and D2196.6.2 Coverage:6.2.1 Definitionthe measure of surface area in ft2/gal(m2/litre) (coatings) or gallons per
33、100 ft2(mastics) at whichfinish must be applied to obtain specified dry thickness anddesired performance.6.2.2 Significance and UseThe performance of finishes isrelated directly to the optimum dry thickness. Therefore,performance properties must be defined in terms of optimumdry thickness, and this
34、value must be established for applica-tion purposes in terms of coverage. Coverage data are essentialfor estimating material quantities and costs.6.2.3 Technical EvaluationTest Methods C461.6.3 Build:6.3.1 Definitionthe thickness to which a coating or masticfinish can be applied without sagging, run
35、ning, sliding, ordripping.6.3.2 Significance and UseFinishes for thermal insulationmust be capable of application on vertical or overhead surfacesat specified coverage without subsequent reduction inthickness, caused by excessive flow or slump. Build alsodetermines the number of coats required for o
36、ptimum drythickness.6.3.3 Technical EvaluationTest Methods C461.6.4 Wet Flammability (during application):6.4.1 Definitionthe relative ease of ignition and conse-quent fire hazard of a finish during application, as indicated byits flash point, fire point, and fuel contribution.6.4.2 Significance and
37、 UseFinishes that contain volatileflammable solvent may ignite readily from a source such aswelding sparks and spatter, electrical short circuits, openflames, or personnel smoking. Such a fire could spread veryrapidly over freshly finished surfaces.6.4.3 Technical EvaluationTest Methods D56, D92, D9
38、3,D1310, and D3828.6.5 Toxicity:6.5.1 Definitionharmful physiological response to vaporinhalation or skin contact with finishes during application.6.5.2 Significance and UseFinishes should not adverselyaffect health of personnel making applications. Containerlabels must describe legally and adequate
39、ly any health hazardinvolved in using the product.6.5.3 Technical EvaluationTest as recommended byAmerican Conference of Governmental Industrial Hygienists.46.6 Temperature and Humidity Range (during application):6.6.1 Definitionthe limiting temperatures and relative hu-midities between which practi
40、cal application of finish can bemade without adverse effect on service properties.6.6.2 Significance and UseApplication of finishes underextremes of atmospheric temperature or humidity, or both, canhinder or prevent attainment of necessary coverage and propercure, thus changing performance propertie
41、s significantly. Thetemperature of the surface to which the finish is applied alsomust be considered.6.6.3 Technical EvaluationTest Method D2354, and prod-uct application tests made at maximum and minimum values oftemperature and humidity in stated design conditions.6.7 Surface Wetting and Adhesion:
42、6.7.1 Definitionthe mutual affinity of the bonding betweenfinish and the surface to which it is applied.6.7.2 Significance and UseCoatings and mastics must wetand bond readily to insulation surfaces without special treat-ments or application techniques, or both. Ease and cost ofapplication require g
43、ood surface wetting and adhesion.6.7.3 Technical EvaluationClosely observe during finishapplication under real or simulated field conditions.6.8 Gap Filling and Bridging:6.8.1 Definitionthe ability to bridge, fill, and level jointsand gaps in installed thermal insulation.6.8.2 Significance and UseJo
44、ints and gaps exist in in-stalled block and blanket insulation. If these are not filled orbridged adequately, the protective value of the finish will beimpaired seriously.6.8.3 Technical EvaluationApply finish over insulation inreal or simulated field conditions over typical joints and gaps.Follow w
45、ith destructive examination to determine effective-ness.6.9 Sizing and Sealing:6.9.1 Definitionthe ability of a finish to resist excessiveabsorption into porous insulation.6.9.2 Significance and UseExcessive penetration of fin-ishes into insulation will affect adversely the performance ofthe finish
46、and the thermal conductivity of the insulation.6.9.3 Technical EvaluationApply finish by film applicatorsimultaneously on insulation and on a nonporous surface.Aftercuring, measure the dry film thickness on the surfaces toestablish the difference due to absorption.6.10 Corrosion or Solvent Attack:4A
47、vailable from American Conference of Governmental Industrial Hygienists(ACGIH), 1330 Kemper Meadow Dr., Cincinnati, OH 45240, http:/www.acgih.org.C647 08 (2013)36.10.1 Definitionharmful effect on metals or thermal in-sulation from contact with finishes.6.10.2 Significance and UseFinishes must not at
48、tack in-sulation or adjacent metals to cause deterioration of theinstallation.6.10.3 Technical EvaluationApply finish by film applica-tor. After curing, examine for evidence of softening, blistering,or shrinkage of insulation, as well as for corrosion of metalsurfaces.6.11 Drying Time and Curing Tim
49、e:6.11.1 Definitionelapsed time required for mastic or coat-ing finish to dry or cure after application, before it may beplaced in operating service.NOTE 3Drying time implies time during which applied finish issensitive to local damage by weather or personnel. Curing time impliestime required to reach optimum service properties.6.11.2 Significance and UsePerformance properties offinishes depend on adequate drying and curing. Prematureservice operation may lead to finish failure. Curing time dataare needed to establish construction schedul
