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Solar Energy

As a leading manufacturer of polysilicon and a pioneer in silicones, WACKER has been an important partner of the solar industry since its beginning. Today the company offers the solar industry a portfolio of future-proof products along the entire solar value chain.

  • Outstanding purity (no other material in the world is produced on an industrial scale with this level of purity)
  • Certified according to ISO 9001, ISO 14001, OHRIS and OHSAS
  • Complete spectrum of polysilicon products

Reliable and high-class components for a wide range of photovoltaic applications

Benefits:

  • Adhesion to typical substrates (glass, aluminum, Tedlar®, EVA, etc.)
  • Neutral crosslinking
  • Long-term resistance to weathering and UV
  • Easy processing

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Tear strength Hardness Shore A Tensile strength Elongation at break Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® SOLAR 1101 - - 30[1] 30[1] 2 N/mm²[2] 2 N/mm²[2] 400 %[3] 400 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1109 BLACK - - 32[1] 32[1] 2.5 N/mm²[2] 2.5 N/mm²[2] 420 %[3] 420 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1109 WHITE - - 32[1] 32[1] 2.3 N/mm²[2] 2.3 N/mm²[2] 425 %[3] 425 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1200 7.1[4] 7.1[4] 35[1] 35[1] 2.1 N/mm²[2] 2.1 N/mm²[2] 250 %[3] 250 %[3] Shear thinning, Thixotropic, Non-slump Condensation-curing, Two-component Self-adhesive, Electrically insulating
Legend
[1] Hardness Shore A | DIN ISO 48-4,  [2] Tensile strength | ISO 37 type 1,  [3] Elongation at break | ISO 37 type 1,  [4] Tear strength | ASTM D 624 B,  [] Suited,  [] Well suited,  [] Ideally suited 

Benefits:

  • Adhesion to typical substrates
  • Very high transparency
  • Rapid curing
  • Long-term resistance to weathering and UV radiation
  • No yellowing

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Viscosity, dynamic Tear strength Penetration Hardness Shore A Hardness Shore 00 Tensile strength Elongation at break Resistance Regulation Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® RT 426 - - > 4 N/mm[1] > 4 N/mm[1] - - 60[2] 60[2] - - 4.5 N/mm²[4] 4.5 N/mm²[4] 120 %[6] 120 %[6] Heat resistant - Flowable Condensation-curing, Two-component -
ELASTOSIL® RT 563 - - 3 N/mm[1] 3 N/mm[1] - - 55[2] 55[2] - - 4.5 N/mm²[4] 4.5 N/mm²[4] 120 %[6] 120 %[6] - - Flowable Condensation-curing, Two-component -
ELASTOSIL® RT 602 A/B 5000 mPa·s[8] 5000 mPa·s[8] - - - - 30[3] 30[3] - - 1.5 N/mm²[5] 1.5 N/mm²[5] 130 %[7] 130 %[7] Heat resistant - Flowable Two-component, Addition Curing -
ELASTOSIL® RT 607 A/B 15000 mPa·s[9] 15000 mPa·s[9] - - - - 55[3] 55[3] - - 3 N/mm²[5] 3 N/mm²[5] 100 %[7] 100 %[7] Heat resistant Flame retardant Flowable Two-component, Addition Curing -
ELASTOSIL® RT 622 A/B 18000.0 mPa·s[10] 18000.0 mPa·s[10] 30 N/mm[1] 30 N/mm[1] - - 27[3] 27[3] - - 6.5 N/mm²[5] 6.5 N/mm²[5] 550 %[7] 550 %[7] - - Flowable Two-component, Addition Curing -
ELASTOSIL® SOLAR 2200 A/B 22500 mPa·s[11] 22500 mPa·s[11] 5.5 N/mm[1] 5.5 N/mm[1] - - 35[3] 35[3] - - 3.5 N/mm²[5] 3.5 N/mm²[5] 260 %[7] 260 %[7] UV stable - - Fast curing under heat, Two-component, Addition Curing -
ELASTOSIL® SOLAR 2202 A/B 1000 mPa·s[12] 1000 mPa·s[12] - - 300 1/10mm[14] 300 1/10mm[14] - - - - - - - - UV stable - - Two-component Optically clear
ELASTOSIL® SOLAR 2205 - - - - - - - - 50[16] 50[16] - - - - - - - - Highly transparent, Electrically insulating
SEMICOSIL® 949 UV A 150.0 mPa·s[13] 150.0 mPa·s[13] - - - - - - 40[17] 40[17] - - - - - - - - -
SEMICOSIL® 949 UV B 150.0 mPa·s[13] 150.0 mPa·s[13] - - - - - - 40[17] 40[17] - - - - - - - - -
WACKER SilGel® 613 - - - - 70 1/10mm[15] 70 1/10mm[15] - - - - - - - - - - - - -
WACKER® PASTE P 12 - - - - - - - - - - - - - - - - - - -
Legend
[1] Tear strength | ASTM D 624 B,  [2] Hardness Shore A | ISO 868,  [3] Hardness Shore A | DIN ISO 48-4,  [4] Tensile strength | ISO 37,  [5] Tensile strength | ISO 37 type 1,  [6] Elongation at break | ISO 37,  [7] Elongation at break | ISO 37 type 1,  [8] Viscosity, dynamic | 23 °C | ISO 3219,  [9] Viscosity, dynamic | 23 °C | DIN EN ISO 3219,  [10] Viscosity, dynamic | 23.0 °C | DIN EN ISO 2555 | Spindle 4; 2,5 UpM; 23 °C,  [11] Viscosity, dynamic | 25 °C | ISO 3219,  [12] Viscosity, dynamic | 25 °C | DIN EN ISO 3219,  [13] Viscosity, dynamic | 25.0 °C | DIN EN ISO 3219,  [14] Penetration (150 g hollow cone) | DIN ISO 2137,  [15] Penetration (hollow cone, 9.38 g) | DIN ISO 2137,  [16] Hardness Shore 00 | ASTM D 2240,  [17] Shore 00 | 23 °C | ASTM D 2240 | 10 sec 140 mW/cm² followed by 30 min 150°C,  [] Suited,  [] Well suited,  [] Ideally suited 

Benefits:

  • Low viscosity and rapid curing
  • Low modulus for reducing thermomechanical stress
  • Protection of bypass diodes against moisture penetration
  • Improved heat dissipation

Product Recommendations

Table is scrollable
Products
Technical data
Viscosity, dynamic Pot life Hardness Shore 00
ELASTOSIL® CAT UV 1000 mPa·s[1] 1000 mPa·s[1] ≥ 1 d[4] ≥ 1 d[4] - -
SEMICOSIL® 949 UV A 150.0 mPa·s[2] 150.0 mPa·s[2] - - 40[5] 40[5]
SEMICOSIL® 949 UV B 150.0 mPa·s[2] 150.0 mPa·s[2] - - 40[5] 40[5]
SEMICOSIL® 950 UV B 1000 mPa·s[3] 1000 mPa·s[3] - - 40.0[6] 40.0[6]
Legend
[1] Viscosity, dynamic | 25 °C | ISO 3219,  [2] Viscosity, dynamic | 25.0 °C | DIN EN ISO 3219,  [3] Viscosity, dynamic | DIN EN ISO 3219 | A: SEMICOSIL® 949 UV A; B: SEMICOSIL® 950 UV B,  [4] Pot life | Typical Value for 25°C for which doubling of mix viscosity in static mixing tube is referred to, [not exposed to UV light or ambient light, depending on addition curing silicone grade]; No processing with premix recommended,  [5] Shore 00 | 23 °C | ASTM D 2240 | 10 sec 140 mW/cm² followed by 30 min 150°C,  [6] Hardness Shore 00 | 23 °C | ASTM 2240 / Type 00 | Curing Conditions: 10 sec / 140 mW/cm2 followed by 30 min 150°C; measured@23°C,  [] Suited,  [] Well suited,  [] Ideally suited 

Applications:

  • Molding of SOG (silicone on glass) Fresnel lenses panels (primary optics)
  • Bonding of the secondary optical element to the solar cell
  • Effective heat management by bonding the solar chip to the heat sink unit
  • Glueing the primary optics and the back panel with the frame

Benefits:

  • Excellent adhesion to typical substrates (glass, aluminum, multiple junction cells, etc.)
  • Neutral crosslinking
  • Long-term resistance to weathering and UV
  • No yellowing
  • Easy processing and rapid curing
  • Outstanding heat resistance

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Tear strength Hardness Shore A Tensile strength Elongation at break Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® SOLAR 1101 - - 30[1] 30[1] 2 N/mm²[2] 2 N/mm²[2] 400 %[3] 400 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1109 BLACK - - 32[1] 32[1] 2.5 N/mm²[2] 2.5 N/mm²[2] 420 %[3] 420 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1109 WHITE - - 32[1] 32[1] 2.3 N/mm²[2] 2.3 N/mm²[2] 425 %[3] 425 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1200 7.1[4] 7.1[4] 35[1] 35[1] 2.1 N/mm²[2] 2.1 N/mm²[2] 250 %[3] 250 %[3] Shear thinning, Thixotropic, Non-slump Condensation-curing, Two-component Self-adhesive, Electrically insulating
ELASTOSIL® SOLAR 3211 2.6 N/mm[4] 2.6 N/mm[4] 54[1] 54[1] 7.4 N/mm²[2] 7.4 N/mm²[2] 80 %[3] 80 %[3] - Two-component Highly transparent, Electrically insulating
Legend
[1] Hardness Shore A | DIN ISO 48-4,  [2] Tensile strength | ISO 37 type 1,  [3] Elongation at break | ISO 37 type 1,  [4] Tear strength | ASTM D 624 B,  [] Suited,  [] Well suited,  [] Ideally suited 

Benefits:

  • Outstanding heat and weathering resistance
  • Long-term stability to UV radiation
  • Particularly suitable for applications involving harsh conditions

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Tear strength Hardness Shore A Tensile strength Elongation at break Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® SOLAR 1101 - - 30[1] 30[1] 2 N/mm²[2] 2 N/mm²[2] 400 %[3] 400 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1109 BLACK - - 32[1] 32[1] 2.5 N/mm²[2] 2.5 N/mm²[2] 420 %[3] 420 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1109 WHITE - - 32[1] 32[1] 2.3 N/mm²[2] 2.3 N/mm²[2] 425 %[3] 425 %[3] Thixotropic - -
ELASTOSIL® SOLAR 1200 7.1[4] 7.1[4] 35[1] 35[1] 2.1 N/mm²[2] 2.1 N/mm²[2] 250 %[3] 250 %[3] Shear thinning, Thixotropic, Non-slump Condensation-curing, Two-component Self-adhesive, Electrically insulating
Legend
[1] Hardness Shore A | DIN ISO 48-4,  [2] Tensile strength | ISO 37 type 1,  [3] Elongation at break | ISO 37 type 1,  [4] Tear strength | ASTM D 624 B,  [] Suited,  [] Well suited,  [] Ideally suited 

Schematic draw of a parabolic trough plant.

HELISOL® heat transfer fluids allow for a significant power block efficiency increase in large-scale applications and raise the temperature limit up to 425 °C. Moreover, HELISOL® heat transfer fluids have a significantly reduced hydrogen formation during operation compared to organic thermal oils.

Benefits of HELISOL® heat transfer fluids

  • Exceptional thermal stability
  • Highest max. working temperature: 425 °C
  • Very broad temperature range: -40 to 425 °C
  • Low pour point: < -40 °C
  • Lower hydrogen formation
  • Low fouling potential

Product Recommendations

Products
Technical data
Product properties
Appearance Application Stability Product Type Specific Features
HELISOL® 10A colorless, clear colorless, clear Stable upon heating Silicone Fluid, Fluid Good heat stability, Heat resistant
HELISOL® 5A colorless, clear[1] colorless, clear[1] Stable upon heating Silicone Fluid, Fluid Good heat stability, Heat resistant
HELISOL® XA colorless, clear colorless, clear Stable upon heating Silicone Fluid, Fluid Good heat stability, Heat resistant
HELISOL® XLP clear clear Stable upon heating Silicone Fluid, Fluid Good heat stability, Heat resistant
Legend
[1] Appearance and color