ASTM_C_1266_-_17.pdf

Designation:C126617Standard Test Method forFlow Characteristics of Preformed Tape Sealants1This standard is issued under the fixed designation C1266;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a laboratory procedure fordetermining the flow characteristics of preformed tape sealantsafter a specified time,temperature,and load.1.2 The values stated in SI units are to be regarded as thestandard.The inch-pound units given in parentheses areprovided for information purposes only.1.3 The committee with jurisdiction of this specification isnot aware of any similar specification within ISO or any otherorganization.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3.Terminology3.1 DefinitionsThe definitions of the following terms usedin this test method are found in Terminology C717:compound,seal,sealant,standard conditions,substrate and tape sealant.4.Summary of Test Method4.1 The tape sealant to be tested is rolled into spherical ballsof equal weight.Four spherical balls are placed between twoaluminum plates,which are then compressed.A standardweight is placed on the test assembly for 1 h at roomtemperature.The height of the test assembly is measured todetermine the rebound of the sample.The test assembly is thenplaced in an 88C(190F)oven with the standard weight on it.After 24 h the height of the test assembly is measured again todetermine the flow of the sample.5.Significance and Use5.1 Tape sealants are tacky,deformable solids,which areused under compression between two or more surfaces ofsimilar or dissimilar substrates in a variety of sealing applica-tions.These tapes are normally supplied in a roll form with arelease paper interlever and are hand pressed against a fixedsubstrate.This procedure is designed to give an indication ofthe flow characteristics of a tape sealant under controlledtemperature and aging conditions with a specified load.6.Apparatus6.1 Aluminum Plates,four,each 6.35 by 76.2 by 101.6 mm(0.25 by 3.00 by 4.00 in.).6.2 Lead Weights,two,each 3.63 kg(8.0 lb)with dimen-sions large enough to cover the entire assembly,but notoverhanging the assembly.6.3 Mechanical Convection Oven,capable of maintaining atemperature of 88 6 1C(190 6 2F).6.4 Steel Spacers,six,each 76.2 by 5.08 by 5.08 6 0.05 mm(3.00 by 0.20 by 0.20 6 0.002 in.).6.5 Thickness Gage,having a total capacity of at least 76.2mm(3.00 in.)graduated in 0.025 mm(0.001 in.)divisions.Thegage shall be equipped to provide a 57 g(2 oz)load over aminimum contact area of 6.35 mm(0.25 in.).6.6 Laboratory Press,at room temperature,to compress thepreformed sealant tape to the proper material thickness.6.7 Stop Watch,to measure the timed intervals specified inthe laboratory procedure.6.8 Laboratory Precision Balance(capable of weighing to0.1 mg)to measure the weight of the individual spherical ballsof tape.7.Sampling7.1 Samples to be tested shall be taken from a fresh roll oftape sealant taken directly from a randomly selected commer-cial container as supplied by the manufacturer,after firstremoving and discarding approximately the first 0.61(2 ft)ofthe roll.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved Jan.1,2017.Published February 2017.Originallyapproved in 1995.Last previous edition approved in 2011 as C126602(2011).DOI:10.1520/C1266-17.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard 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.1 8.Test Assembly Preparation8.1 A total of two assemblies per tape are to be prepared.8.1.1 Prepare a test assembly as follows:8.1.1.1 Clean two aluminum plates with isopropyl alcohol(IPA)or other suitable solvent.8.1.1.2 Using a marking pen,draw intersecting diagonals onone side of both metal plates.On each plate mark four poin