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PERFORMANCE TEST REPORTRendered to:DOW SILICONES COROPORATIONPRODUCT: DOWSIL 995 Silicone Structural SealantSUBSTRATE: GlassReport No.: G2555.02-106-31Report Date:04/09/18Test Record Retention Date:03/29/22130 Derry CourtYork, PA 717.764.7700f. 717.764.4129

PERFORMANCE TEST REPORTRendered to:DOW SILICONES CORPORATION2200 West Salzburg Road P.O. Box 994Auburn, Michigan 48611Report No.: G2555.02-106-31Test Start Date:10/27/16Test Completion Date:03/29/18Report Date:04/09/18Test Record Retention Date:03/29/22Product: DOWSIL 995 Silicone Structural SealantSubstrate: GlassProject Summary: Architectural Testing, Inc., an Intertek company ("Intertek-ATI"), wascontracted by Dow Silicones Corporation to evaluate the materials properties of their DOWSIL 995 Silicone Structural Sealant, when applied to a glass substrate. A summary of test results arereported in the table below.ASTM C1184 - 14, Standard Specifications for Structural Silicone Sealant - SummaryDOWSIL 995 Silicone Structural SealantTestResultRequirementRheological Property (Vertical)0"3/16"Rheological Property (Horizontal)No DeformationNo DeformationExtrudability31 seconds10 seconds maxHardness3220-60Heat Aging0%No cracking or chalking10% max weight lossNo cracking or chalkingTack-Free Time180 min.No Transfer in 3 hoursTensile Strength (Standard Conditions)192 psiTensile Strength (190 F)165 psiTensile Strength (-20 F)224 psiTensile Strength (Water Immersion)51 psiTensile Strength (5,000 h Weathering)160 psi130 Derry CourtYork, PA psi minp. 717.764.7700f. 717.764.4129

G2555.02-106-31Page 2 of 9Product Descriptions: The materials were shipped to Intertek-ATI from Dow SiliconesCorporation facility in Auburn, Michigan and consisted of one box of 12 tubes of the DOWSIL 995 Silicone Structural Sealant batch number was 0008874472 and had an expiration date ofMarch 6, 2017.Test Methods: The test specimens were evaluated in accordance with the following methods forcompliance to ASTM C1184 - 14, Standard Specifications for Structural Silicone Sealants:ASTM C639 - 15, Standard Test Method for Rheological (Flow) Properties of ElastomericSealantsASTM C603-14, Standard Test Method for Extrusion Rate and Application Life of ElastomericSealantsASTM C661-15, Standard Test Method for Indentation Hardness of Elastomeric-Type Sealantsby Means of a DurometerASTM C792-15, Standard Test Method for Effects of Heat Aging on Weight Loss, Cracking,and Chalking of Elastomeric SealantsASTM C679-15, Standard Test Method for Tack-Free Time of Elastomeric SealantsASTM C1135-15, Standard Test Method for Determining for Tensile Adhesion Properties ofStructural Sealants

G2555.02-106-31Page 3 of 9Test Procedures and Test Results: The results are reported in the following tables.Section 8.1 - ASTM C639 - Rheological (Flow) PropertiesThe rheological testing consisted of evaluating the DOWSIL 995 Silicone Structural Sealant asType II-sealant single component nonsag (See sec. 1.3.2), Stainless steel channels measuring 3/4"x 1/2"x 6" with both ends open and the back surface extended 2", were used in accordance withsection 6.4. The sealants were tested for vertical slump and horizontal slump. After theconditioning period of 16 hours at standard laboratory nominal conditions of 70 F (21 C) and 50%relative humidity of the sealant, two channels were placed in a refrigerator and conditioned at40 F for 2 hrs., and two channels were placed in an oven conditioned at 122 F for 2 hrs. Thechannels were then removed from the respective chambers and filled with the DOWSIL 995Silicone Structural Sealant. The vertical slump (sec. 8.2.1) was tested followed by horizontalslump (Sec. 8.2.2) tests in the above conditions. The amount of sag was measured to nearest(1/16")Sag Test ResultsSpecimen ID1 - Horizontal2 - VerticalTemp. (40 F)No ChangeNo ChangeSpecimen ID1 - Horizontal2 - VerticalTemp. (120 F)No ChangeNo ChangeSection 8.2 - ASTM C603 - Extrusion RateOne tube of the DOWSIL 995 Structural Sealant each was secured to the SATEC Model 50 UD(ICN: Y002011). See Photo No. 2 in Appendix A. A test pressure of 345 kPa (50 psi) was appliedwith the sealant being extruded and material was extruded into a 1-pt. container until completelyemptied.Specimen IDDOWSIL 995 Structural SealantTime in seconds required to empty cartridge(Extrusion Rate)32

G2555.02-106-31Page 4 of 9Test Procedures and Test Results: (Continued)Section 8.3 - ASTM C661 - HardnessThree test specimens were prepared with a tube of the DOWSIL 995 Silicone Structural Sealantthat was conditioned 24 hrs. at standard conditions before starting the test. Samples wereprepared centering a brass frame on Glass, and filling the brass frame with sealant. The sampleswere then cured for 21 days as follows: 7 days at standard conditions, 7 days in a chambercontrolled at 100 F and 95% relative humidity, and 7 days at standard conditions. Uponcompletion of this curing process, three hardness readings were taken with a Shore A Durometer(ICN: Y000092).Hardness MeasurementSpecimen No.Measurement 1Measurement 2Measurement 3Average1313232232323232Section 8.4 - ASTM C792 - Effects of Heat AgingThree test specimens of the DOWSIL 995 Silicone Structural Sealant were prepared afterconditioning 24 hrs. at standard conditions before starting the test. Samples were preparedcentering a brass frame on an aluminum plate, and filling the brass frame with sealant. Thesamples were then cured for 28 days at standard conditions. At the end of the 28-day curingperiod the specimens were weighed to the nearest 0.1g using an analytical balance (ICN: 65216).Two specimens were placed in a forced draft oven at 158 F for 21 days, and the control specimenremained in standard conditions for the same period. At the conclusion of the 21-day heat-agingperiod the specimens were removed from the oven and allowed to cool for 1hr. Each was thenweighed and the percentage of weight loss was calculated.Effects of Heat AgingSpecimenNo.12(Control)[email protected] 28-dayStandardCure(g)[email protected] 21 daysHeat-Aging(g)Weight Loss(%)Cracking orChalking96.896.695.

G2555.02-106-31Page 5 of 9Test Procedures and Test Results: (Continued)Section 8.5 - ASTM C679 - Tack-Free TimeOne tube of the DOWSIL 995 Silicone Structural Sealant was conditioned at standard laboratoryconditions (73 F and 50% R.H.) for at least 24 hours. In accordance with Section 8.3, pads ofsealant were made by filling a 1/8" thick form having dimensions of 1-1/2" wide x 5" long. At thefirst 30-minute interval an aluminum weight was placed on a polyethylene strip widthwise for 30seconds and the polyethylene was then peeled away from the sealant at a 90 angle. If sealantadhered to the strip the test was continued for another 30 minutes and for each 30-minuteinterval after until a polyethylene strip was removed cleanly. This occurred when checked at 3hrs. (180 min.)Tack-Free Time180 min.Section 8.6 - ASTM C1135 - Tensile AdhesionDOWSIL 995 Silicone Structural Sealant was applied to glass measuring (0.25" x 1" x 3.0"). Thespecimens were then cured for 21 days at (73 3.6 F). At the conclusion of 21 days the specimenswere tested in the specified five conditions in accordance with the test method (Room temp,Oven exposure, Freezer exposure, Water immersion, and QUV exposure (5,000 hrs.), using anInstron Universal Test Machine (ICN: 005740) equipped with a 2kN load cell (ICN: 005742)operating at a separation rate of 0.5 in. /min. for 1 min. (See photographs in Appendix A).Tensile Adhesion - Room TemperatureSpecimen No.12345AverageUltimate Tensile Stress(psi)185191197195191192

G2555.02-106-31Page 6 of 9Test Procedures and Test Results: (Continued)ASTM C1135 - Tensile Adhesion (Continued)Tensile Adhesion - Oven Exposure 190 FSpecimen No.12345AverageUltimate Tensile Stress(psi)171152183159160165Tensile Adhesion - Freezer Exposure -20 FSpecimen No.12345AverageUltimate Tensile Stress(psi)227223233215220224

G2555.02-106-31Page 7 of 9Test Procedures and Test Results: (Continued)ASTM C1135 - Tensile Adhesion (Continued)Tensile Adhesion - Water ExposureSpecimen No.12345AverageUltimate Tensile Stress(psi)34.658.185.24.9674.351Tensile Adhesion - 5000 hr Accelerated WeatheringSpecimen No.12345AverageUltimate Tensile Stress(psi)153160162163160160

G2555.02-106-31Page 8 of 9Intertek-ATI will service this report for the entire test record retention period. Test records thatare retained such as detailed drawings, datasheets, representative samples of test specimens, orother pertinent project documentation will be retained by Intertek-ATI for the entire test recordretention period.Results obtained are tested values and were secured using the designated test methods. Thisreport does not constitute certification of this product nor an opinion or endorsement by thislaboratory. It is the exclusive property of the client so named herein and relates only to thespecimens tested. This report may not be reproduced, except in full, without the written approvalof Intertek-ATI.For INTERTEK-ATI:Rodney E. HollandTechnician IComponents / Materials TestingJoseph M. BricknerLaboratory SupervisorComponents / Materials TestingREH:jmb/kfAttachments (pages)This report is complete only when all attachments listed are included.Appendix A - Photographs (2)

G2555.02-106-31Page 9 of 9Revision LogRev. #0DatePage(s)Revision(s)04/09/18N/AOriginal report issueThis report produced from controlled document template ATI 00231, revised 11/22/16.

G2555.02-106-31APPENDIX APhotographs

G2555.02-106-31Photo No. 1DOWSIL 995 Silicone Structural Sealant Tensile Adhesion - Pre-TestPhoto No. 2Tensile Adhesion - Test Setup

G2555.02-106-31Photo No. 3Tensile Adhesion - TestingPhoto No. 4DOWSIL 995 Silicone Structural SealantTensile Adhesion - Post Test