ASTM_C_742_-_99.pdf

Designation:C 742 99Standard Test Method forDegree of Set for Wood Sash Glazing Compound1This standard is issued under the fixed designation C 742;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes the determination of thedegree of set of wood sash glazing compounds.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.3 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:C 717 Terminology of Building Seals and Sealants2D 217 Test Method for Cone Penetration of LubricatingGrease3D 2451 Test Method for Degree of Set for Glazing Com-pounds on Metal Sash22.2NWWDA Industry Standards:NWWDA I.S.4-94 Water Repellant Preservative Non-Pressure Treatment for Millwork4NWWDA T.M.2-94 Swellometer Test Method43.Terminology3.1 DefinitionsRefer to Terminology C 717 for definitionsof the following terms:compound,glazing.4.Summary of Test Method4.1 Abrass ring is placed on a wooden block and filled withthe compound to be tested.The assembly is aged for 2 weeksat 158F(70C),then conditioned for 3 h at room temperature,after which the compound is tested with a penetrometer.5.Significance and Use5.1 This test method evaluates the durability of a glazingcompound by measuring its resistance to hardening on aging.6.Apparatus6.1 Forced-Air Oven.6.2 Penetrometer and Grease Cone,as described in TestMethod D 217,having a total moving load of 150.0 6 1 g.6.3 Rings,two,brass,2.5 in.(63.5 mm)in diameter,0.5 in.(12.5 mm)deep,and approximately116in.(1.5 mm)in wallthickness.6.4 Blocks,two,white pine,312by 4 by34in.(88 by 100 by19 mm).6.5 Wood Preservative,1 gal,commercial type(water-repellant)conforming to NWWDA I.S.4-94.6.6 Laboratory Spatula,with 5-in.(125-mm)blade.7.Sampling7.1 The compound should be used directly from the con-tainer as supplied by the manufacturer.If there are any signs ofseparation,mix the compound thoroughly,prior to testing.8.Procedure8.1 Condition the two white pine blocks for 1 week(168 h)at 73.4 6 3.6F(23 6 2C)and 50 6 5%relative humidity.8.2 Immerse the wood muntin bars in the wood preservativefor 30 s when using a solvent-borne preservative and 3 min forwater-borne preservative in accordance with NWWDA T.M.2-94.Weight them if necessary to ensure complete submersion.Then remove them from the preservative and dry for 24 h at73.4 6 3.6F(23 6 2C)and 50 6 5%relative humidity.8.3 Prepare two assemblies as follows:Center a brass ringon the flat face of a wood block and using the spatula,pack it,flush with the top edge,with freshly worked glazing com-pound.8.4 Place the two assemblies in a forced-air convection ovenfor 336 h(2 weeks)at 158 6 3.6F(70 6 2C),positioningthem at the same level as the bulb of the thermometer.8.5 Remove the assemblies from the oven and conditionthem for 3 h at 73.4 6 3.6F(23 6 2 C).8.6 Carefully remove the ring and the contained compoundfrom each wood block by placing the spatula under the ring,and while slightly tilting same,gently scrape it against thewood to assure complete removal of the compound.8.7 Invert each ring and its contained compound and placeeach specimen in turn on the penetrometer stand.Take five 5-sreadings on each,approximately12in.(12.7 mm)from theouter edge and at approximately equal(672)circumferentialintervals.Make sure that the top of the penetrometer cone1This test method is under the jurisdiction of ASTM Committee C-24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.12on Oil and Resin Base Glazing and Caulking Sealants.Current edition approved Feb.10,1999.Published May 1999.Originallypublished as C 742 73.Last previous edition C 742 94.2Annual Book of ASTM Standards,Vol 04.07.3Annual Book of ASTM Standards,Vol 05.01.4Available from National Wood Window and Door Association,1400 EastTouhy Avenue,G54,Des Plaines,IL 60018.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTMNOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.barely touches the surface and that the dial is adjusted to zerobefore each reading.Clean the tip of the cone with acetone ormethyl ethyl ketone(MEK)prior to each reading.9.Report9.1 Average the ten readings on the two specimens.If noneof the readings vary more than 15%from the average,reportthe a