Sika SG20S structural sealant
FURTHER VALUES SEE SAFETY DATA SHEET
| Chemical composition | Single component organosilicon |
| Color (CQP001-1) | Black |
| Curing rate | Moisture curing |
| Density (not hardened before) | 1.41 kg/l |
| Temperature applied | 5 ─ 40 °C |
| Table dry time (CQP019-1) | 25 Minutes |
| Finger touch time (CQP019-3) | 150 minutes |
| Shore hardness A (CQP023-1/ISO 48-4) | 47 |
| Tensile strength (CQP036-1/ISO 527) | 2.1 MPa |
| Elastic modulus at 100% elongation (CQP036-1/ISO 37) | 0.6 MPa |
| Elongation at break (CQP036-1/ISO 37) | 700 % |
| Crack tear diffusion resistance (CQP045-1/ISO 34) | 12 N/mm |
| Service temperature | -40 ─ 150 °C |
| Best shelf life (CQP016-1) | 12 months |
Product advantages
Comply with GB 16776-2005, ASTM C 1184&ASTM C920 for Type S, Grade NS, Grade 25 (displacement capacity ± 25%)
Very good UV resistance and weather resistance can be effectively adhered to many substrates, including glass, metal, coated metal, plastic and wood
Scope of application
Sikasil ® SG-20S is used for structural glass and other adhesive construction.
This product is only applicable to experienced professional users. The actual substrate and conditions must be tested to ensure adhesion and material compatibility.
Curing rate
Sikasil ® SG-20 S reacts with moisture in the atmosphere to solidify. At low temperature, the moisture in the air is usually low, and the curing reaction rate is slightly slow (see Figure 1)
Construction method
Surface finishing
The surface shall be clean, dry and free of grease, oil and dust.
The surface treatment depends on the specific properties of the substrate and will affect the adhesion durability.
Construction
The optimum temperature of base material and sealant is between 15 ° C and 25 ° C.
Sikasil ® SG-20 can be processed with manual, pneumatic or electric glue gun and pump equipment. For suggestions on selecting and setting up the appropriate pump system, please contact Sika Industrial Systems Engineering.
The joint must be of proper size.
The calculation of necessary joint size is based on the technical data of adhesive and adjacent building materials, the exposure degree of building components, their structure and size, and external loads.
The joint depth shall not exceed 15 mm
The finishing and completion must be carried out within the molding time of the sealant or adhesive.
Modified Sikasil ® For SG-20S adhesive surface, in order to achieve better wetting effect, the adhesive can be extruded without using mold agent.
Packaging method 600ml sausage package
