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Aerospace

Materials used in the aerospace industry have to withstand often adverse operating conditions on a continuous basis. Low pressures, high and low temperatures, rapid changes of temperature and pressure, intense radiation – WACKER silicones can withstand all of these because their property profile is tailored to each application.

Benefits:

  • Minimal outgassing rates and hence no delamination under outer-space conditions
  • High radiation resistance
  • Full retention of elasticity down to the glass transition temperature at below -100 °C
  • Dissipation of thermomechanical stress by virtue of silicones’ characteristic flexibility

Applications:

  • Lamination of the solar assembly to the support structure for the solar array wing
  • Antistatic bonding of satellite components that are particularly susceptible to electrostatic charging

Benefits:

  • Outstanding permanent flexibility
  • Specialty grades are thermally stable from -30 to +250 °C
  • Exceptional resistance to fluids, the elements, and UV radiation
  • Very good molding and surface reproduction

Applications:

  • Sealing profiles for aircraft windows
  • Abradable coating in jet engines
  • Bonded joints and seals in the sanitary, galley and cabin areas
  • Tool and auxiliary material in the production of composites for ventilation systems and the cabin interior

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Viscosity, dynamic Tear strength Hardness Shore A Tensile strength Elongation at break Resistance Regulation Vulcanizate
ELASTOSIL® E43 BLACK 250000 mPa·s[2] 250000 mPa·s[2] 11.5 N/mm[1] 11.5 N/mm[1] 30[6] 30[6] 6.5 N/mm²[7] 6.5 N/mm²[7] 500 %[10] 500 %[10] - Solvent-free -
ELASTOSIL® S 692 A/B 70000 mPa·s[3] 70000 mPa·s[3] 3.0 N/mm[1] 3.0 N/mm[1] 35[6] 35[6] 1.5 N/mm²[8] 1.5 N/mm²[8] 200 %[11] 200 %[11] Low-temperature flexible Low volatile Electrically conductive
ELASTOSIL® S 699 A/B 180000 mPa·s[4] 180000 mPa·s[4] 9.0 N/mm[1] 9.0 N/mm[1] - - 1.8 N/mm²[8] 1.8 N/mm²[8] 180 %[11] 180 %[11] - - -
WACKER® RTV-S 691 A/B 55000.0 - 70000.0 mPa·s[5] 55000.0 - 70000.0 mPa·s[5] - - 50 - 60[6] 50 - 60[6] 4.0 - 6.0 N/mm²[9] 4.0 - 6.0 N/mm²[9] 100 - 160 %[12] 100 - 160 %[12] Heat resistant, Low-temperature flexible Low volatile -
Legend
[1] Tear strength | ASTM D 624 B,  [2] Viscosity, dynamic D = 0,5 1/s | 25 °C | DIN EN ISO 3219,  [3] Viscosity, dynamic Spindle 5, 2.5 rpm | Brookfield,  [4] Viscosity, dynamic | 25 °C | 0.5 1/s | DIN EN ISO 3219,  [5] Viscosity, dynamic spindle 5, 2.5 rpm | 23.0 °C | Brookfield,  [6] Hardness Shore A | DIN ISO 48-4,  [7] Tensile strength | ISO 37 type 1 | Type 3 /23°C / 2mm,  [8] Tensile strength | ISO 37 type 1,  [9] Tensile strength | ISO 37 | ISO 37 Type 3,  [10] Elongation at break | ISO 37 type 1 | Type 3 /23°C / 2mm,  [11] Elongation at break | ISO 37 type 1,  [12] Elongation at break | ISO 37 | ISO 37 Type 3,  [] Suited,  [] Well suited,  [] Ideally suited