Dow Corning? SJ268 silicone sealant 1. Features ◆ meet Chinese GB16776 structural glazing silicone sealant used in construction specifications. ◆ including such as coated glass, enamel, then glass, reflective glass. Anodizing and powder-coated aluminum and stainless steel profiles including most substrates have excellent adhesion properties. ◆-component products. ◆ curing process odorless, no corrosion. ◆ resistance to ozone and temperature extremes. 2. Advantages ◆ curing has excellent weather resistance, good UV resistance, high temperature resistance (extreme temperatures can also be used). ◆ higher ultimate tensile strength so that it is fully applicable to structural bonding applications. ◆ excellent mechanical properties. ◆-component products, easy construction operations. 3. Apply silicone structural glazing sealant 4. Product description ◆ Dow SJ268 is a one-component neutral cure silicone sealant. Specifically for elastic structural bonding (glass, metal and other building components) applications. ◆ It can also be used as a stiffener member is bonded construction panels and other similar adhesive applications. ◆ neutral oxime curing at room temperature to release a small amount of oxime. 5. Typical performance specification writers Note: The following data is not recommended for use in the development of specifications, before the norm, the Dow Corning sales representative for a detailed description of this product. Test Method Unit supplies supplier CTM0097 numerical proportion g / ml 1.43 GB13477 vertical or flowing mm 0 GB13477 dry time (25 ° C, 50% RH) 15 minutes 40-60 minutes working time after 21 days of curing - at 25 ° C / 75 ° F, 50% RH, a tensile pull test anti 0.3 CTM1028 MPa tensile force when the ultimate elongation MPa 1.5 H-shaped specimens 30-60 CTM1028 ultimate elongation% 500 CTM1028 100% elongation when GB13477 Shore Hardness Shore A Test ASTM C 711 Tensile Strength (23 ° C) MPa 0.8 Tensile Strength (90 ° C) MPa 0.5 Tensile Strength (-30 ° C) MPa 0.9 Tensile Strength (flooding) MPa 0.6 Tensile Strength (water - UV ) MPa 0.6 Description: CTM is Dow Corning's internal testing methods, GB13477 is building sealants test method according to the technical specifications and standards of Dow Corning sealant SJ268 exhibit efficient physical properties and bonding properties after aging test, its basic characteristics are also GB16776 meet the performance indicators. 7. A method for use in structural applications, Dow Corning SJ268 should gluing at the factory. In a plastic factory to ensure the best conditions in order to give full play to the performance of construction products. Site gluing repair work is limited to special circumstances or assembly conditions allowed. 8. interface design principle, the use of Dow Corning structural interface SJ268 depth should be 6 mm to 15 mm. However, the actual depth is determined by computing professionals. And structural adhesive calculations should consider regulating thermal displacement dynamic displacement, but in general, should not be less than 6 mm deep plastic and ideal ratio range of 3: 1-1: 1 (plastic width: glue deep). 9. Annex select the right choice for all the accessories (such as pads, Pui Tsuen material) to avoid problems related to the tape of glue discoloration and incompatibility caused loss are very important. As part of the standard testing services, Dow Corning will also assess the suitability of the proposed material. For most interfaces, the opening of polyethylene foam rod is the recommended back village material. Silicone pad is most often recommended compatible pad. 10. The ideal conditions for optimal mounting assembly should be completed and meet the following conditions of temperature and humidity in the factory: temperature conditions: 5 degrees to 40 degrees, humidity: 40% to 60% RH. 11. Prepare thoroughly cleaned before gluing all interfaces and assembly area, clear all contaminants such as grease, oil, dust, frost or moisture. All metal, glass or other substrate surface applications lint cotton, using volume to clean with the "two cloth" cleaning method. 12. When using primer Dow SJ268, according to the project test reports Dow Corning Technical Services Department to decide whether to use a primer. For more information on the primer, please contact local offices of Dow Corning Corporation. 13. The surface of the shield and scraping gum near the interface should be covered up to ensure the cleanliness of the seam line. After gluing or completed within five minutes of action in the rubber squeegee surface crust and remove the masking tape. 14. The method according to claim sealant material is placed back to the village, pads and spacers, Shi Dow SJ268 should play in a continuous operation using positive pressure to fill plastic interface. Squeegee can spread glue along the interface surface of the backing material and the village, recommended concave tools to make rubber squeegee to fully fill the interface. 15. maintain on-site verification adhesion and compatibility of the sealant interface, the Dow made a specific recommendation. Periodically check the recommendations will help ensure long-term structural safety of the sealing unit. Damage to the interface can be used to repair the Dow SJ268, on specific considerations, operational procedures Please inquire Dow Corning Technical Services Department.