SIKASIL® SG-20

What is SIKASIL® SG-20 and why choose it?

SIKASIL® SG-20 from Sika is a high-strength, 1-component, neutral-curing silicone adhesive specifically developed for structural glazing and demanding industrial bonding applications. It combines high mechanical strength with very high elongation and excellent adhesion on a wide range of substrates. The product is CE-marked and meets recognised international standards and approvals for structural glazing and bonding sealants.

Main features and benefits

• 1-component, moisture-curing silicone adhesive with neutral cure mechanism.
• High mechanical performance with tensile strength of 2.2 MPa and 100 % modulus of 0.9 MPa.
• High elasticity with elongation at break of 450 % and movement capability of ± 25 % (ASTM C 719).
• Very good non-sag / thixotropic properties for clean application on vertical joints.
• Excellent adhesion to glass, metals, coated metals, plastics and wood.
• Outstanding resistance to UV and weathering for durable outdoor use.
• Service temperature range from -40 °C to 150 °C.
• Fire performance: class B1 according to DIN 4102-1 and tested according to EN 11925-2 / DIN 4102-B1.
• Meets structural glazing and bonding requirements according to EAD 090010-00-0404, ETAG 002 (with ETA), EN 13022, ASTM C1184 and ASTM C920 Type S, Grade NS, Class 25.
• ETA-06/0090 issued by Centre Scientifique et Technique du Bâtiment.
• CE marked with factory production control by notified body 0757.
• Available in black, grey S6 and white S3 for aesthetic integration in façade designs.
• Not paintable, remaining as an elastic adhesive joint.

Technical specifications

• Chemical base: 1-component silicone
• Cure mechanism: Moisture-curing
• Cure type: Neutral
• Colour: Black, grey S6, white S3
• Density (uncured): 1.36 kg/l
• Non-sag / thixotropic properties: Very good (ISO 7390)
• Application temperature (ambient): 5 – 40 °C
• Optimum substrate and sealant temperature for application: 15 – 25 °C
• Skin time: 25 minutes (23 °C / 50 % r. h.)
• Tack-free time: 180 minutes (23 °C / 50 % r. h.)
• Curing mechanism details: Cures from the surface inward by reaction with atmospheric moisture; curing speed decreases at lower temperature and humidity.
• Shore A hardness: 39
• Tensile strength: 2.2 MPa (ISO 527 / ISO 37)
• Elongation at break: 450 % (ISO 527 / ISO 37)
• 100 % modulus: 0.9 MPa (ISO 527 / ISO 37)
• Tear propagation resistance: 7 N/mm (ISO 34)
• Movement capability: ± 25 % (ASTM C 719)
• Short-term thermal resistance: 200 °C for 4 hours; 220 °C for 1 hour
• Service temperature range: -40 – 150 °C
• Shelf life: 9 months (stored below 25 °C)
• Design tensile strength for dynamic loads: σ_des = 0.17 MPa (ETA-06/0090)
• Packaging: 300 ml cartridge; 600 ml unipack; 25 kg pail; 250–270 kg drum

Applications and use cases

Structural glazing

• Designed for structural glazing applications where high mechanical performance and long-term durability are required.
• Widely used in structural glazing of façades, providing load-bearing adhesive joints between glass and supporting frames.

Solar modules and demanding industrial bonding

• Suitable for bonding of solar modules.
• Can be used in other highly demanding industrial applications where a structural silicone adhesive is needed.

Substrate compatibility and professional use

• Adheres excellently to glass, metals, coated metals, plastics and wood.
• Recommended only for experienced professional users.
• Tests with actual substrates and real conditions must be carried out to confirm adhesion, compatibility and suitability of all adjacent materials such as gaskets, tapes, setting blocks and other accessories.

Application guidance

• Surfaces must be clean, dry and free from grease, oil and dust.
• Surface treatment depends on the specific substrates and is crucial for a long-lasting bond.
• Apply with manual, pneumatic or electric piston guns or suitable pump equipment.
• Joints must be properly dimensioned based on technical values of the adhesive and building materials, exposure, construction design, element size and external loads.
• Joints deeper than 15 mm must be avoided.
• Tooling and finishing must be carried out within the skin time, pressing the adhesive against joint flanks. No tooling agents should be used.
• Uncured material can be removed from tools with Sika® Remover-208 or another suitable solvent; cured material can only be removed mechanically.
• Hands and skin must be cleaned immediately with suitable hand wipes or industrial hand cleaner and water. Solvents must not be used on skin.
• Cannot be overpainted.

FAQ

1. Is SIKASIL® SG-20 a 1-component or 2-component adhesive?

   SIKASIL® SG-20 is a 1-component, moisture-curing silicone adhesive.

2. What colours are available for SIKASIL® SG-20?

   The product is available in black, grey S6 and white S3.

3. Can SIKASIL® SG-20 be painted over?

   No. SIKASIL® SG-20 is an elastic silicone adhesive and cannot be overpainted.

4. Which temperature range is suitable for applying SIKASIL® SG-20?

   The ambient application temperature is 5 – 40 °C, with an optimum substrate and sealant temperature between 15 °C and 25 °C.

5. What is the skin time and tack-free time?

   At 23 °C and 50 % relative humidity, the skin time is approximately 25 minutes and the tack-free time is approximately 180 minutes.

6. For which applications is SIKASIL® SG-20 recommended?

   It is ideal for structural glazing, bonding of solar modules and other demanding industrial bonding applications requiring high mechanical performance with silicone.

7. Who should use SIKASIL® SG-20?

   The product is intended only for experienced professional users.

8. How should joints be designed when using SIKASIL® SG-20?

   Joints must be properly dimensioned considering technical values of the adhesive and adjacent materials, exposure conditions, construction and size of elements and external loads. Joint depths greater than 15 mm must be avoided.

9. How can uncured and cured SIKASIL® SG-20 be removed?

   Uncured material can be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once cured, it can only be removed mechanically.

10. What approvals and standards does SIKASIL® SG-20 comply with?

    It meets requirements of EAD 090010-00-0404, ETAG 002 (with ETA), EN 13022, ASTM C1184, ASTM C920 Type S, Grade NS, Class 25, has ETA-06/0090, is CE-marked with notified body 0757 and is fire rated class B1 according to DIN 4102-1 and tested according to EN 11925-2 / DIN 4102-B1.

Section 14 – Transport information

Consultar ficha técnica del fabricante.

Section 8 – Individual protection measures

Consultar ficha técnica del fabricante.

*Contenido generado por IA