Sikasil® SG-500 CN two-component structural silicon sealant
Features &Benefits
- Meets requirements of ASTM C 1184, ASTM C 920 and GB 16776
- Broad adhesion range
- Resistant to UV and weathering
- Long term durability
- Quality product based on proven and consistent quality raw materials
Technical Product Data
| Properties |
Component A |
Component B |
| Chemical base |
2-C silicone |
|
| Color (CQP1 001-1)
Color mixed |
White |
Black |
|
Black |
||
| Cure mechanism |
Polycondensation |
|
| Cure type |
Neutral |
|
| Density (CQP 006-4)
Density Mixed |
1.4 kg/l approx. | 1.08 kg/l approx. |
| 1.38 kg/l approx. = 11.52 lbs/gal | ||
|
Mixing Ratio A:B by weight A:B by volume |
13:1 10:1 |
|
| Viscosity (CQP 029-6) |
1,200 Pa.s approx. |
130 Pa.s approx. |
| Consistency |
Paste |
|
| Application temperature | 40°F to 105°F (5°C to 40°C) | |
| Snap time2(CQP 554-1) |
60 minutes approx. |
|
| Tack free time2(CQP 019-1) |
270 minutes approx. |
|
| Shore A-hardness (CQP 023-1/ ISO 868/ ASTM C-661) |
40 approx. |
|
| Tensile strength (CQP 036-1/ISO 37/ASTM D-412) | 290 psi (2.0 N/mm2) approx. | |
| Elongation at break (CQP 036-1/ISO 37/ASTM D-412) |
350% |
|
| Tear propagation resistance (CQP 045-1 / ISO 34) | 34.3 pli (4.0 N/mm2) approx. | |
| 100% Modulus (CQP 036-1/ISO 37/ASTM D-412) | 145 psi (1.0 N/mm2) approx. | |
| 12.5% Modulus (CQP 036-1/ISO 37/ASTM D-412) | 29 psi (0.2 N/mm2) approx. | |
| Movement accommodation capability (ASTM C 719) |
+/- 12.5% |
|
| Tension design stress under permanent load (EN 13022) |
20 psi (0.14 N/mm2) |
|
| Shear design stress under permanent load (EN 13022) | 1.45 psi (0.01 N/mm2) | |
| Thermal resistance 4 hours
Short term 1 hour |
390°F (200°C) 430°F (220°C) |
|
| Service temperature | -40° - 300°F ( -40° - 150°C ) | |
| Shelf life (storage below 75°F (25°C) (CQP 016-1) |
15 months |
12 months |
1)CQP=Corporate Quality Procedure 2)73°F (23°C) / 50% r.h.
Applications
Sikasil® SG-500 CN US is ideal for structural glazing and similar high demanding industrial applications. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
Cure Mechanism
Sikasil® SG-500 CN US starts to cure immediately after mixing the two components. The speed of the reaction depends mainly on the temperature; the higher the temperature, the faster the curing process. Heating above 122°F (50°C) is not advisable as it may lead to bubble formation. The mixer open time, i.e. the time the material can remain in the mixer without flushing or extrusion of the product, is significantly shorter than the snap time listed in the property table. For more information, please contact the Technical Service Department of Sika Industry (tsmh@us.sika.com).
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 will be given on request. Contact Technical Service at (tsmh@us.sika.com).
Mixing
Prior to processing with Sikasil® SG500 CN US, mix both components homogeneously and air-bubble free; in the proper mixing ratio with an accuracy of +/- 10%. Most commercially available metering and mixing equipments are suitable. While the A-part of Sikasil® SG-500 CN US is stable in air, the B-part is moisture sensitive and must only be exposed briefly to air. Advice on specific applications will be given on request. Contact Technical Service at (tsmh@us.sika.com).
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.
Tooling and Finishing
Tooling and finishing must be carried out within the snap time of the sealant. No tooling agents should be used.
Removal
Uncured Sikasil® SG-500 CN US may be removed from tools and equipment with Sika®Remover-208 or another suitable solvent. Strictly follow solvent manufacturer's instructions for use and warnings. Once cured, the material can only be removed mechanically. Hands and exposed skin should be washed immediately using a suitable industrial hand cleaner and water. Do not use solvents on skin!
Overpainting
Sikasil® SG-500 CN US cannot be overpainted.
Limitations
Most Sikasil® WS, FS, SG, IG, WT, AS and other engineering silicone sealants manufactured by Sika are compatible with each other and SikaGlaze® IG Sealants, however in all cases for specific information regarding compatibility between various Sikasil (with other Sikasil® ) and SikaGlaze® products please contact the Technical Service Department of Sika Industry at tsmh@us.sika.com. All other manufacturer sealants have to be approved by Sika before using them in combination with Sikasil® SG-500 CN US. Where two or more different reactive sealants are used, allow the first to cure completely before applying the next.
- While the A-part of Sikasil® SG-500 CN US is stable in air, the B-part is moisture sensitive and must be only briefly exposed to air.
- Sikasil® IG, SG, 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-500 CN US must be tested in advance.
- Where two or more different reactive sealants are used, allow the first to cure completely before applying the next.
Packaging
Component A: 260 kg drum
Component B: 20 kg pail
2-part cartridge: 490 ml, for onsite repair glazing
