1、Designation: C 647 08Standard Guide toProperties and Tests of Mastics and Coating Finishes forThermal Insulation1This standard is issued under the fixed designation C 647; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、 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 finishes for ther
3、-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 6.2Build 6.3Wet Flammab
4、ility 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 7Specimen Preparat
5、ion 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 7.7.2Stress Resist
6、ance 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 the standard. The values given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2C 168 Terminology Relating to Thermal InsulationC 4
7、19 Practice for Making and Curing Test Specimens ofMastic Thermal Insulation CoatingsC 461 Test Methods for Mastics and Coatings Used WithThermal InsulationC 488 Test Method for Conducting Exterior Exposure Testsof Finishes for Thermal InsulationC 639 Test Method for Rheological (Flow) Properties of
8、Elastomeric SealantsC 681 Test Method for Volatility of Oil- and Resin-Based,Knife-Grade, Channel Glazing CompoundsC 733 Test Method for Volume Shrinkage of Latex Sealants3C 755 Practice for Selection of Water Vapor Retarders forThermal InsulationC 792 Test Method for Effects of Heat Aging on Weight
9、Loss, Cracking, and Chalking of Elastomeric SealantsD36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)D56 Test Method for Flash Point by Tag Closed Cup TesterD92 Test Method for Flash and Fire Points by ClevelandOpen Cup TesterD93 Test Methods for Flash Point by Pensky-MartensC
10、losed Cup TesterD 529 Practice for Enclosed Carbon-Arc Exposures of Bi-tuminous MaterialsD 543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD 562 Test Method for Consistency of Paints Measuring1This guide is under the jurisdiction of ASTM Committee C16 on ThermalInsulation
11、and is the direct responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved Aug. 1, 2008. Published September 2008. Originallyapproved in 1969. Last previous edition approved in 2000 as C 647 95 (2000).2For referenced ASTM standards, visit the ASTM website, ww
12、w.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.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United
13、States.Krebs Unit (KU) Viscosity Using a Stormer-Type Viscom-eterD 638 Test Method for Tensile Properties of PlasticsD 658 Test Method for Abrasion Resistance of OrganicCoatings by Air Blast Abrasive3D 747 Test Method for Apparent Bending Modulus ofPlastics by Means of a Cantilever BeamD 790 Test Me
14、thods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating MaterialsD 822 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of Paint and Related CoatingsD 903 Test Method for Peel or Stripping Strength of Adhe-sive BondsD 968 Test Methods for Abrasion Resista
15、nce of OrganicCoatings by Falling AbrasiveD 1310 Test Method for Flash Point and Fire Point ofLiquids by Tag Open-Cup ApparatusD 1640 Test Methods for Drying, Curing, or Film Forma-tion of Organic Coatings at Room TemperatureD 1654 Test Method for Evaluation of Painted or CoatedSpecimens Subjected t
16、o Corrosive EnvironmentsD 1729 Practice for Visual Appraisal of Colors and ColorDifferences of Diffusely-Illuminated Opaque MaterialsD 1823 Test Method for Apparent Viscosity of Plastisolsand Organosols at High Shear Rates by Extrusion Viscom-eterD 1824 Test Method for Apparent Viscosity of Plastiso
17、lsand Organosols at Low Shear RatesD 1849 Test Method for Package Stability of PaintD 2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) Vis-cometerD 2243 Test Method for Freeze-Thaw Resistance of Water-Borne CoatingsD 2354 Test Method for Minimum
18、 Film Formation Tem-perature (MFFT) of Emulsion Vehicles4D 2444 Test Method for Determination of the Impact Re-sistance of Thermoplastic Pipe and Fittings by Means of aTup (Falling Weight)D 2453 Test Method for Shrinkage and Tenacity of Oil- andResin-Base Caulking CompoundsD 2485 Test Methods for Ev
19、aluating Coatings For HighTemperature Service4D 2507 Terminology of Rheological Properties of GelledRocket Propellants4D 2939 Test Methods for Emulsified Bitumens Used asProtective CoatingsD 3134 Practice for Establishing Color and Gloss Toler-ancesD 3274 Test Method for Evaluating Degree of Surface
20、Disfigurement of Paint Films by Microbial (Fungal orAlgal) Growth or Soil and Dirt AccumulationD 3361 Practice for Unfiltered Open-Flame Carbon-ArcExposures of Paint and Related CoatingsD 3828 Test Methods for Flash Point by Small Scale ClosedCup TesterD 4339 Test Method for Determination of the Odo
21、r ofAdhesivesE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE 96/E 96M Test Methods for Water Vapor Transmission ofMaterialsE 162 Test Method for Surface Flammability of MaterialsUsing a Radiant Heat Energy SourceE 659 Test Method for Autoignition Temperature of LiquidChemic
22、alsG21 Practice for Determining Resistance of SyntheticPolymeric Materials to FungiG23 Practice for Operating Light-Exposure Apparatus(Carbon-Arc Type) With and Without Water for Exposureof Nonmetallic Materials (Discontinued 2001)43. Terminology3.1 Terminology C 168 shall be considered as applying
23、tothe terms used in this specification.3.2 General Definitions:3.2.1 application 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
24、or spray, in moderate thickness, 30 mils (0.76mm).3.2.3 mastica protective 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
25、 govern perfor-mance of finishes after installation.3.3 Specific DefinitionsTerms 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 li
26、miting values assigned will form a part of theproduct specification.4.2 All 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 b
27、e required.4.3 Membrane reinforcements are frequently specified andused with 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 Coati
28、ngs5.1 Vapor-Retarder TypeA finish intended for service oninsulated units that are operated below ambient temperature atleast part of the time.NOTE 1Practice C 755 may provide additional guidance.5.1.1 Outdoor service.5.1.2 Indoor service.4Withdrawn.C6470825.2 Vapor-Permeable TypeA finish intended f
29、or serviceon insulated units that are operated above ambient temperature.(See 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.NO
30、TE 2Consistency is not a fundamental property but is made up ofviscosity, plasticity, and other rheological phenomena (see TerminologyD 2507). In non-Newtonian behavior, usual for mastics and coatings forthermal insulation, the ratio of shearing stress to the rate of shearing strainvaries with the s
31、hearing stress.6.1.2 Significance and UseConsistency determineswhether a mastic or coating can be troweled, applied by glovedhand, brushed, or sprayed. It has a direct effect on applicationcosts.6.1.3 Technical EvaluationTest Methods C 461, C 639,D 562, D 1823, D 1824, and D 2196.6.2 Coverage:6.2.1
32、Definitionthe measure of surface area in square feetper gallon (m2/litre) (coatings) or gallons per 100 ft2(mastics)at which finish must be applied to obtain specified drythickness and desired performance.6.2.2 Significance and UseThe performance of finishes isrelated directly to the optimum dry thi
33、ckness. Therefore,performance properties must be defined in terms of optimumdry thickness, and this 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 C 461.6.3 Build
34、:6.3.1 Definitionthe thickness to which a coating or masticfinish can be applied without sagging, running, 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 in
35、 thick-ness, caused by excessive flow or slump. Build also determinesthe number of coats required for optimum dry thickness.6.3.3 Technical EvaluationTest Methods C 461.6.4 Wet Flammability (during application):6.4.1 Definitionthe relative ease of ignition and conse-quent fire hazard of a finish dur
36、ing application, as indicated byits flash point, fire point, and fuel contribution.6.4.2 Significance and 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 co
37、uld spread veryrapidly over freshly finished surfaces.6.4.3 Technical EvaluationTest Methods D 56, D 92,D 93, D 1310, and D 3828.6.5 Toxicity:6.5.1 Definitionharmful physiological response to vaporinhalation or skin contact with finishes during application.6.5.2 Significance and UseFinishes should n
38、ot adverselyaffect health of personnel making applications. Containerlabels must describe legally and adequately any health hazardinvolved in using the product.6.5.3 Technical EvaluationTest as recommended byAmerican Conference of Governmental Industrial Hygienists.56.6 Temperature and Humidity Rang
39、e (during application):6.6.1 Definitionthe limiting temperatures and relative hu-midities between which practical 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 b
40、oth, canhinder or prevent attainment of necessary coverage and propercure, thus changing performance properties significantly. Thetemperature of the surface to which the finish is applied alsomust be considered.6.6.3 Technical EvaluationTest Method D 2354, andproduct application tests made at maximu
41、m and minimumvalues of temperature and humidity in stated design conditions.6.7 Surface Wetting and Adhesion:6.7.1 Definitionthe mutual affinity of the bonding be-tween finish and the surface to which it is applied.6.7.2 Significance and UseCoatings and mastics must wetand bond readily to insulation
42、 surfaces without special treat-ments or application techniques, or both. Ease and cost ofapplication require good 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
43、 ability to bridge, fill, and level jointsand gaps in installed thermal insulation.6.8.2 Significance and UseJoints 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 Ev
44、aluationApply finish over insulation inreal or simulated field conditions over typical joints and gaps.Follow with 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 Significanc
45、e and UseExcessive penetration of fin-ishes into insulation will affect adversely the performance ofthe finish 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
46、film thickness on the surfaces toestablish the difference due to absorption.6.10 Corrosion or Solvent Attack:6.10.1 Definitionharmful effect on metals or thermal in-sulation from contact with finishes.6.10.2 Significance and UseFinishes must not attack in-sulation or adjacent metals to cause deterio
47、ration of theinstallation.5Available from American Conference of Governmental Industrial Hygienists,Inc. (ACGIH), 1330 Kemper Meadow Dr., Cincinnati, OH 45240, http:/www.acgih.org.C6470836.10.3 Technical EvaluationApply finish by film applica-tor. After curing, examine for evidence of softening, bli
48、stering,or shrinkage of insulation, as well as for corrosion of metalsurfaces.6.11 Drying Time and Curing Time: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 whic
49、h 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 schedules.6.11.3 Technical EvaluationTest Methods C 461 andD 1640.6.12 Shrinkage:6.12.1 Definitionchange in volume from wet to dry stateobserved after mastic and coatings have been applied andcured.
