Sikasil SG-20 Structural Glazing Silicone Adhesive - Black

Sikasil® SG-20 is a 1-component, neutral-curing structural glazing silicone adhesive, which combines mechanical strength with high elongation. It is complying with EOTA ETAG 002 and provided with the CE-mark. It adheres excellent to a wide range of substrates.    

• Meets requirements of EOTA ETAG 002 (carries ETA), EN 13022, ASTM C1184, ASTM C920 for Type S, Grade NS, Class 25 (movement capability ± 25 %)
• Structural sealant for use in structural sealant glazing systems according ETAG 002 Part 1 Edition 2000 used as EAD, ETA-06/0090 issued by Technical Assessment Body Centre Scientifique et Technique du Bâtiment, Declaration of Performance 15323048, certified by notified product certification body 0757, certificate of constancy of performance 0757-CPR-596-7110761-4-4, and provided with the CE marking
• Design tensile strength for dynamic loads: σ_des = 0.17 MPa (ETA)
• Fire rated class B1 (DIN 4102-1)
• Outstanding UV and weathering resistance
• Bonds excellent to glass, metals, coated metals, plastics and wood

Usage:

Sikasil® SG-20 is ideal for structural glazing and other bonding applications where high mechanical performance with silicone is required. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.

Application Information:

Surface preparation:

• Surfaces must be clean, dry and free from grease, oil and dust. Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond.

Application: 

• The optimum temperature for substrate and sealant is between 15 °C and 25 °C. Sikasil® SG-20 can be processed with hand, pneumatic or electric driven piston guns as well as pump equipment. For advice on selecting and setting up a suitable pump system, contact the System Engineering Department of Sika Industry.
• Joints must be properly dimensioned.
• 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 must be avoided.

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 to 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 have to be washed immediately using hand wipes such as Sika® Cleaner-350H cleaning towels or a suitable industrial hand cleaner and water. Do not use solvents on skin.

Overpainting

• Sikasil® SG-20 cannot be overpainted.

Application limits

• Recommended solutions from Sika for structural glazing and window bonding are usually compatible to each other. These solutions consist of products such as Sikasil® SG, IG, WS and WT series. To exclude materials influencing Sikasil® SG-20, all materials such as gaskets, tapes, setting blocks, sealants, etc., in direct and indirect contact have to be approved by Sika in advance.
• Where two or more different reactive sealants are used, allow the first to cure completely before applying the next. The above mentioned Sika process materials may only be used in structural glazing or window bonding applications after a detailed examination and written approval of the corresponding project details by Sika Industry.