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Sikasil SG-20, 1-Component Silicone for Structural Glazing, Exterior, Black

Adhesives & Sealants
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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High-strength, 1-component silicone structural glazing adhesive, CE-marked

Sikasil SG-20 is a 1-component, neutral-curing structural glazing silicone adhesive, which combines mechanical strength with high elongation. It adheres excellent to a wide range of substrates.  

  • Meets requirements of EN 13022, ASTM C1184, ASTM C920 for Type S, Grade NS, Class 25 (movement capability ± 25 %)
  • Structural sealant for structural sealant glazing systems covered by ETA-06/0090 issued by Technical Assessment Body Centre Scientifique et Technique du Bâtiment, Declaration of Performance 15323048 by notified product certification body 0757, certificate of constancy of performance 0757-CPR-596-7110760-4-6, 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
  • SNJF-VEC recognzied (product code: 2436)
  • Complies with common VOC requirements:
    Indoor Air Comfort GOLD: pass, EMICODE: EC1 Plus, French VOC Regulation: A+, BREEAM International (v.6 2021)/BREEAM NOR (v.6 2022): Exemplary Level, M1: pass, Global LEED v4/v4.1 beta EQc 2: Low-Emitting Materials: CDPH-IAQ SCAQMDRule1168
PRODUCT BENEFITS
  • Meets requirements of EN 13022, ASTM C1184, ASTM C920 for Type S, Grade NS, Class 25 (movement capability ± 25 %)
  • Structural sealant for structural sealant glazing systems covered by ETA-06/0090 issued by Technical Assessment Body Centre Scientifique et Technique du Bâtiment, Declaration of Performance 15323048 by notified product certification body 0757, certificate of constancy of performance 0757-CPR-596-7110760-4-6, provided with the CE marking
  • Design tensile strength for dynamic loads:
    σdes = 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
  • SNJF-VEC recognzied (product code: 2436)
  • Complies with common VOC requirements:
    Indoor Air Comfort GOLD: pass, EMICODE: EC1 Plus, French VOC Regulation: A+, BREEAM International (v.6 2021)/BREEAM NOR (v.6 2022): Exemplary Level, M1: pass, Global LEED v4/v4.1 beta EQc 2: Low-Emitting Materials: CDPH-IAQ SCAQMDRule1168
 
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.  
Packaging

Cartridge

300 ml

Unipack600 ml
Pail25 kg
Drum250 kg
Typical Product Data
Chemical base

1-component silicone

Colour (CQP001-1)

Black, grey S6, white S3

Cure mechanism

Moisture-curing

Cure type

Neutral

Density (uncured)

1.36 kg/l

Non-sag properties (CQP061-4 / ISO 7390)

Very good

Application temperatureambient

5 ─ 40 °C

Skin time (CQP019-1)

25 minutes A

Tack free time (CQP019-3)

180 mintues A

Curing speed (CQP049-1)

(see diagram)

Shore A hardness (CQP023-1 / ISO 48-4)

39

Tensile strength (CQP036-1 / ISO 527)

2.2 MPa

100 % modulus (CQP036-1 / ISO 527)

0.9 MPa

Elongation at break (CQP036-1 / ISO 527)

450 %

Tear propagation resistance (CQP045-1 / ISO 34)

7 N/mm

Service temperature

-40 ─ 150 °C

Shelf life (CQP016-1)

9 months B

CQP = Corporate Quality ProcedureA)23 °C / 50 % r. h. B)stored below 25 °C
Technical Information
CURE MECHANISM

Sikasil SG-20 cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the curing reaction proceeds somewhat slower (see diagram 1).

en_PNG_01-en-diagram-sikasil-sg-20

Diagram 1: Curing speed Sikasil SG-20

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 manual, 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 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.
For specific information regarding compatibility between various Sikasil products and other Sika products contact the Technical Department of Sika Industry.
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 one.
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.