1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1980 05 08 3.11.2 Revised and Retyped CAH1-RD582846-51978 11 27 Metricated and Retyped CAH1-RD572066-1901963 10 24 Released AS1 #1124WP 3948-a Page 1 of 4 SEALER, SILICONE RUBBER - HIGH VISCOSITY ESB-M4G92-ASEALE
2、R, SICICONE RUBBER - MEDIUM VISCOSITY INACTIVE ESB-M4G92-BSEALER, SILICONE RUBBER - LOW VISCOSITY ESB-M4G92-C1. SCOPEThe ma terial defined by this specification is a one component, air curingsilicone rubber based adhesive.2. APPLICATIONThis specification was released originally for material used to
3、seal jointssuch as the drip rail to vinyl roof in the Landau top construction.3. REQUIREMENTSApplicable to ESB-M4G92-A, B & C unles other wise indicated.3.1 COLORAs specified on the engineering drawing, and/or the Trim and SealerManual.3.2 SOLIDS, min 95 %(ASTM D 2834, except heat for 3 h at 102 +/-
4、 3 E C)3.3 WEIGHT PER VOLUME 8.4-8.8 lb/gal(ASTM D 816) (1.01-1.05 kg/L)3.4 VISCOSITY, max(FLTM BV 3-1, 40 psi (276 kPa line pressure)3.4.1 ESB-M4G92-A 30 s(Use 0.104 in (2.64 mm) orifice)3.4.2 ESB-M4G92-B 70 s(Use 0.073 in (1.85 mm) orifice)3.4.3. ESB-M4G92-C 50 s(Use 0.073 in (1.85 mm) orifice)3.5
5、 CURE RATEA 1/8 x 1/ 2 x 6 in.(3.2 x 13 x 150 mm) bead shall be tack free andcompletely cured in not more than 24 h after application.ENGINEERING MATERIAL SPECIFICATION ESB-M4G92-AINACTIVE ESB M4G92-BESB-M4G92-CWP 3948-b Page 2 of 4 Test Method: Apply a 1/4 in (6.4 mm) diameter bead of sealant along
6、the bottom of a 1/2 x 6 (13 x 150) mm enameled steel U-channel.Immedi ately after application, remove the excess sealant with ascraper to obtain a uniform 1/8 x 1/2 in (3.2 x 13 mm) mass ofsealant in the channel. Condition for 24 h at 23 +/- 2 E C and 45 +/-5 % relative humidity and then examine. (S
7、ave s ample for next test.)3.6 SHRINKAGE Shall not crack or shrinkTest Method: Condition the sample prepared in pa ra 3.5 for 2 weeks at70 +/- 1 E C in a mechanical convection oven.3.7 COLD FLEXIBILITY No crackingTest Method: Apply a 1/ 8 in (3.2 mm) diameter x 6 (150 mm) long beadof sealant to a st
8、rip o f aluminum foil. Condition for 24 h at 23 +/-2 EC. Expose to a temperature of -23 E C for 4 h and bend 180 E arounda temperature conditioned 1/8 in (3.2 mm) mandrel.3.8 WEATHERABILITYNo staining, cracking, blistering, pinholing or other deleteriouseffects.Test Method: Apply a 1/8 (3.2 mm) diam
9、eter bead of sealant(non-black), 6 in (150 mm) long to an enameled 3 x 9 in (75 x 225 mm)steel panel. Condition for 24 h at 23 +/- 2 E C. Expose in an AtlasXW Weatherometer having a 102-18 cam cycle for 500 h and examine.3.9 ULTRAVIOLET LIGHT STABILITY No staining or discoloration(FLTM BO 15-1)Test
10、Method: Prepare the test specimen as descri bed in para 3.8. Mask1/2 of the length of the sealer bead with aluminum foil. Expose todry ultraviolet light in a fluorescent sunlamp c abinet for a total of500 h and examine.3.10 MIGRATION STAINING NoneTest Method: Apply a 1/8 x 1/2 x 6 (3.2 x 13 x 150 mm
11、) ribbon ofsealant to a piece of white ESB-M2F83 vinyl Landau top material.Condition for 24 h at 23 +/- 2 EC. Expose to dry ultraviolet lightas descri bed in para 3.9 for 200 h, and examine for migrationstaining around the sealant.3.11 TENSILE SHEAR ADHESION, min3.11.1 Normal 100 % Cohesive Failure2
12、4 h 30 psi (207 kPa)72 h 50 psi (345 kPa)7 days 100 psi (690 kPa)ENGINEERING MATERIAL SPECIFICATION ESB-M4G92-AINACTIVE ESB M4G92-BESB-M4G92-CWP 3948-b Page 3 of 4 3.11.2 Aged 100 % Cohesive Failure7 days at 82 +/- 1 EC 100 psi(690 kPa)500 h in weatherometer 100 psi(690 kPa)Test Method: Apply suf fi
13、cient sealant to 0.25 x 1 x 4 in (6.4 x 25x 100 mm) glass plates to pro vide a bond area of 0.5 in (323 mm ) by2 20.10 in (2.5 mm) thickn ess when mated with 0.035 x 1 x 3 in (0.89 x25 x 75 mm) enameled steel panel. Normal adhesive assemblies shallbe conditio ned for the specified times at 23 +/- 2
14、EC. Aged testasse mblies shall be conditioned for 7 days minimum prior toenvir onmental exposure. Normal and aged assembly tests shall beconducted in triplicate.Pull th e bonded assemblies in a testing machine having a jawseparation rate of 1 in (25 mm)/min.3.12 FLOW3.12.1 ESB-M4G92-A No flow3.12.2
15、ESB-M4G92-B 0.5 in (13 mm) min2.5 in (64 mm) min3.12.3 ESB-M4G92-C 4 in (102 mm) min6 in (152 mm) minTest Method: The 1/4 in (6.4 mm) groove in the flow rate fixture(Figure 1) sh all be blocked 4 in (100 mm) from the top edge. Fillthe upper portion of the groove with sealer to a depth of 1/8 (3.2mm.
16、) Remove the block and measure the flow rate , when exposed for 10min at 23 +/- 2 EC.3.13 SUPPLIERS RESPONSIBILITYMaterial supplied to this specification must be equivalent to thatoriginally approved. C hanges in formulation or processing shall notbe made without prior a pproval as described in Supp
17、lier Procedure I-A.4. APPROVAL OF SUPPLIERSSup pliers to this specification must be approved by the affected productengine ering office. Procedure for gaining approval of a specific materialto a n ew/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be a
18、dded to the Engineering MaterialApproved Source ListENGINEERING MATERIAL SPECIFICATION ESB-M4G92-AINACTIVE ESB M4G92-BESB-M4G92-CWP 3948-b Page 4 of 4 5. GENERAL INFORMATIONThis i nformation is for direction of the user and is not a requirement forthe supplier.5.1 COLORThe material is available in t
19、he following colors:Clear Black WhiteFlat black Off white BlueGreen5.2 CAUTIONThe material shall not be applied so that it con tacts adjacent paintedmetal surfaces, since it will produce paint defects, such as poorpaint adhesion, pinhole, blisters, etc. due to material acid content(glacial acetic acid).FIGURE 1
