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Product Data Sheet Version 1 (07 / 2009) Sikasil ® SG-20 High strength structural silicone adhesive Technical Product Data Chemical base 1-C silicone Colour (CQP 1 001-1) Black, grey S6, white S3 Cure mechanism Moisture-curing Cure type Neutral Density (uncured) (CQP 006-4) 1.37 kg/l approx. Non-sag properties (CQP 061-4 / ISO 7390) < 2 mm approx. Application temperature 5 - 40°C (40 - 105°F) Skin time 2 (CQP 019-2) 15 min approx. Tack-free time 2 (CQP 019-1) 180 min approx. Curing speed (CQP 049-1) See diagram 1 Shore A-hardness (CQP 023-1 / ISO 868) 39 approx. Tensile strength (CQP 036-1 / ISO 37) 2.2 N/mm 2 approx. Elongation at break (CQP 036-1 / ISO 37) 450% approx. Tear propagation resistance (CQP 045-1 / ISO 34) 7 N/mm approx. 100% modulus (CQP 036-1 / ISO 37) 0.9 N/mm 2 approx. Movement accommodation (ASTM C 719) 25% Thermal resistance (CQP 513-1) long term 180°C (356°F) approx. Short term 4 hours 200°C (392°F) approx. 1 hours 220°C (428°F) approx. Service temperature -40 - 150°C approx. (-40 - 302°F) Moisture vapor transmission rate (CQP 520-2 / ISO 12572) 18 g H2O/m 2 24 h2 mm approx. Shelf life (storage below 25°C) (CQP 016-1) 9 months 1) CQP = Corporate Quality Procedure 2) 23°C (73°F) / 50% r.h. Description Sikasil ® SG-20 is a neutral-curing silicone adhesive which combines mechanical strength with high elongation. It adheres excellent to a wide range of substrates. Sikasil ® SG-20 is manufactured in accordance with ISO 9001 quality assurance system and the responsible care program. Product Benefits - Meets requirements of EOTA ETAG 002 (carries ETA), EN 13022, ASTM C 1184 - Fire rated (EN 11925-2 / DIN 4102-B1) - Outstanding UV and weathering resistance - Bonds excellent to glass, metals, coated metals, plastics and wood Areas of Application Sikasil ® SG-20 can be used for structural sealant glazing, bonding of solar modules and other highdemanding industrial applications. This product is suitable for professional experienced users only. Tests with original substrates and conditions have to be performed to ensure adhesion and material compatibility. Sikasil ® SG-20 1 / 2
Cure Mechanism Sikasil ® SG-20 cures by reaction with atmospheric moisture. The reaction thus starts at the surface and proceeds to the core of the joint. The curing speed depends on the relative humidity and the temperature (see diagram 1 below). Heating above 50°C to speed-up the vulcanization is not advisable as it may lead to bubble formation. At low temperatures the water content of the air is lower and the curing process proceeds more slowly. Curing speed [mm] 10 50°C 35°C 23°C 8 6 8°C Diagram 1: Curing speed 1-C-Sikasil ® 4 50°C / 95% r.h. 35°C / 90% r.h. 2 23°C / 50% r.h. 8°C / 30% r.h. 0 0 2 4 6 8 10 Time [days] Application Limits Most Sikasil ® WS, FS, SG, IG, WT, AS and other engineering silicone sealants manufactured by Sika are compatible with each other and with SikaGlaze ® IG sealants. For specific information regarding compatibility between various Sikasil ® and SikaGlaze ® products please contact the Technical Service Department of Sika Industry. All other sealants have to be approved by Sika before using them in combination with Sikasil ® SG-20. Where two or more different reactive sealants are used, allow the first to cure completely before applying the next. Sikasil ® SG, IG and WT sealants and adhesives may only be used in structural glazing or window bonding applications by experienced professionals and after a detailed examination and written approval of the corresponding project details by the Technical Service Department of Sika Industry. The compatibility of gaskets, backer rods, setting blocks and other accessory materials with Sikasil ® SG-20 must be tested in advance. Further information available at: www.sika.ch www.sika.com Sika Schweiz AG Business Unit Industry Tüffenwies 16 CH-8048 Zurich Switzerland Tel. +41 58 436 40 40 Fax +41 58 436 55 30 The above information is offered for general guidance only. Advice on specific applications will be given on request. Method of Application Surface preparation Surfaces must be clean, dry and free from oil, grease and dust. Advice on specific applications and surface pretreatment methods is available from the Technical Service Department of Sika Industry. Application After suitable joint and substrate preparation, Sikasil ® SG-20 is gunned into place. Joints must be properly dimensioned as changes are no longer possible after construction. Basis for calculation of the necessary joint dimensions are the technical values of the adhesive and the adjacent building materials, the exposure of the building elements, their construction and size as well as external loads. Joints deeper than 15 mm should be avoided. For more information please contact the Technical Service Department of Sika Industry. Tooling and finishing Tooling and finishing must be carried out within the skin time of the sealant or adhesive. When tooling freshly applied Sikasil ® SG-20 press the adhesive to the joint flanks to get a good wetting of the bonding surface. No tooling agents should be used. Removal Uncured Sikasil ® SG-20 may be removed from tools and equipment with Sika ® Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin should be washed immediately using Sika ® Handclean Towel or a suitable industrial hand cleaner and water. Do not use solvents! Overpainting Sikasil ® SG-20 is an elastic adhesive and cannot be overpainted. Further Information Copies of the following publications are available on request: - Material Safety Data Sheet - General Guidelines “Structural Silicone Glazing with Sikasil ® Adhesives” Packaging Information Cartridge 300 ml Unipack 600 ml Pail 25 kg Drum 270 kg Value Bases All technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstances beyond our control. Health and Safety Information For information and advice regarding transportation, handling, storage and disposal of chemical products, users shall refer to the actual Material Safety Data Sheets containing physical, ecological, toxicological and other safetyrelated data. Legal Notes The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under normal conditions in accordance with Sika's recommendations. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request. Sikasil ® SG-20 2 / 2
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Page 4 and 5: 4 Before you get started Symbols us
Page 6 and 7: 6 Warnings on interim storage, remo
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Page 10 and 11: 10 Installation recommendations Ali
Page 12 and 13: 12 Preparation and planning Warning
Page 14 and 15: 14 Adhesion Warning! Please make su
Page 16 and 17: 16 Installation on standing seam ro
Page 18 and 19: 18 The rails are always installed o
Page 20 and 21: 20 Marking Please note Measure plan
Page 22 and 23: 22 1. Apply the mounting rails to t
Page 24 and 25: 24 4. Attach the slide guards (6) t
Page 26 and 27: 26 Module installation Carry the mo
Page 28 and 29: 28 Please note Measure the open-cir
Page 30 and 31: 30 Please note 2. Thread the wire s
Page 32 and 33: 32 Maintenance and cleaning The til
Page 34 and 35: 34 Appendix EC Declaration of Confo
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