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Gaskets

WACKER silicone rubbers possess excellent sealing and adhesive properties, are resistant to heat and fluids, and have excellent durability. This functional reliability helps to keep the occupants safe. Especially in the engine compartment, our silicone grades seal reliably under demanding conditions, such as high temperatures, constant vibration, and contact with fluids. Silicones are also an integral part of solid gaskets with their rugged multi-layer structure.

Benefits:

  • High heat stability
  • Very good resistance to fluids

Applications:

  • Cylinder-head gaskets
  • Impregnation of substrate materials (whether or not they contain sulfur)
  • Gasket contour can be screen printed
  • Topcoats for surface sealing

Product Recommendations

Table is scrollable
Products
Technical data
Viscosity, dynamic Hardness Shore A Elongation at break
ELASTOSIL® A 4 21000 cP[1] 21000 cP[1] 50[2] 50[2] 100 % 100 %
Legend
[1] Viscosity, dynamic | 25 °C | WSTM-2103,  [2] Hardness Shore A | WSTM-1110,  [] Suited,  [] Well suited,  [] Ideally suited 

Benefits:

  • Fuel, oil and chemical resistance
  • Oil-bleeding
  • Flame resistant
  • Heat resistance over a wide temperature range (from -90 °C to +300 °C).

Applications:

  • Molded Seals
  • Engine gaskets
  • Oil-pan seals
  • Coolant-system seals
  • Sealing mats used in multipin plugs and for single-wire and radial seals

Benefits:

  • Highly versatile processing
  • Simple processing
  • High cost-efficiency
  • Nondestructive disassembly possible
  • Integrated gasket

Applications:

  • Radiator gaskets
  • Sealing of water pumps and oil pumps
  • Housing seals
  • Sound and heat insulation
  • Shock and vibration decoupling

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Viscosity, dynamic Tear strength Hardness Shore A Tensile strength Elongation at break Hardness Shore 00 Resistance Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® E4 - - 7.3 N/mm[1] 7.3 N/mm[1] 15[2] 15[2] 2 N/mm²[4] 2 N/mm²[4] 750 %[7] 750 %[7] - - - Non-slump - -
ELASTOSIL® RT 624 "4S" A/B VS 60000 mPa·s[10] 60000 mPa·s[10] - - - - - - - - - - - - - -
ELASTOSIL® RT 713 - - - - - - - - - - - - - Non-slump Fast curing under heat, One-component, Addition Curing Foam, Compressible
ELASTOSIL® RT 723 A/B 600000 mPa·s[11] 600000 mPa·s[11] 13.8 N/mm[1] 13.8 N/mm[1] - - 5.9 N/mm²[5] 5.9 N/mm²[5] 500 %[8] 500 %[8] - - Media resistant, Heat resistant, UV stable - Fast curing under heat, Two-component, Addition Curing -
ELASTOSIL® RT 773 - - 4.7 N/mm[1] 4.7 N/mm[1] 35[2] 35[2] 1.2 N/mm²[5] 1.2 N/mm²[5] 75 %[8] 75 %[8] - - Media resistant Shear thinning, Thixotropic, Non-slump Condensation-curing, Two-component Self-adhesive, Compressible, Low density, Electrically insulating
ELASTOSIL® SC 870 A/B 40000 mPa·s[12] 40000 mPa·s[12] - - 8 - 12[3] 8 - 12[3] 350 kPa[6] 350 kPa[6] 100 %[9] 100 %[9] 40 - 60[13] 40 - 60[13] Heat resistant Thixotropic Two-component, Addition Curing Foam, Compressible
Legend
[1] Tear strength | ASTM D 624 B,  [2] Hardness Shore A | DIN ISO 48-4,  [3] Hardness Shore A | DIN ISO 48-4 | (with skin),  [4] Tensile strength | ISO 37 type 1 | Type 3 / 23°C / 2mm,  [5] Tensile strength | ISO 37 type 1,  [6] Tensile strength | ISO 1798,  [7] Elongation at break | ISO 37 type 1 | Type 3 / 23°C / 2mm,  [8] Elongation at break | ISO 37 type 1,  [9] Elongation at break | ISO 1798,  [10] Viscosity, dynamic D = 0.5 1/s | 25 °C | DIN EN ISO 3219,  [11] Viscosity, dynamic | 25 °C | 0.5 1/s | DIN EN ISO 3219,  [12] Viscosity, dynamic | 23 °C | Brookfield | Spindle 5, 2.5UPM,  [13] Hardness Shore 00 (with skin) | ASTM D 2240,  [] Suited,  [] Well suited,  [] Ideally suited 

Unlike inserted gaskets, FIPGs do not require the mating surfaces to have high dimensional accuracy. In addition, the cured gasket material remains securely in place without the need for additional fixing. These two aspects allow wider part tolerances and lower the cost of parts development.

Benefits:

  • Effective bonding
  • Highly stable joint
  • Uniform stress distribution and perfect stress relaxation
  • Versatility
  • High cost-efficiency

Applications:

  • Oil-pan gaskets
  • Gearbox seals
  • Headlamp bonding
  • Sealing housings against moisture and the effects of weathering

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Viscosity, dynamic Tear strength Hardness Shore A Tensile strength Elongation at break Resistance Regulation Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® A234 WHITE 25000 mPa·s[3] 25000 mPa·s[3] 3.5 N/mm[1] 3.5 N/mm[1] 35[9] 35[9] 2.5 N/mm²[11] 2.5 N/mm²[11] 200 %[15] 200 %[15] Heat resistant - - - -
ELASTOSIL® A33 IVORY 1000000 mPa·s[4] 1000000 mPa·s[4] 7.8 N/mm[2] 7.8 N/mm[2] 28[9] 28[9] 2.5 N/mm²[11] 2.5 N/mm²[11] 300 %[15] 300 %[15] Oil resistant - Non-slump - -
ELASTOSIL® A59 GRAY 40000 mPa·s[5] 40000 mPa·s[5] 3.0 N/mm[1] 3.0 N/mm[1] 20[9] 20[9] 1.2 N/mm²[11] 1.2 N/mm²[11] 300 %[15] 300 %[15] Oil resistant, Heat resistant - Self-levelling - -
ELASTOSIL® E10 ROT - - 8.0 N/mm[1] 8.0 N/mm[1] 25[9] 25[9] 2.5 N/mm²[12] 2.5 N/mm²[12] 300 %[16] 300 %[16] Heat resistant Solvent-free Flowable - -
ELASTOSIL® E14 Red - - 7 N/mm[1] 7 N/mm[1] 32[9] 32[9] 2.5 N/mm²[11] 2.5 N/mm²[11] 400 %[15] 400 %[15] Heat resistant MIL-A 46106 grade Non-slump - -
ELASTOSIL® E4 - - 7.3 N/mm[1] 7.3 N/mm[1] 15[9] 15[9] 2 N/mm²[13] 2 N/mm²[13] 750 %[17] 750 %[17] - - Non-slump - -
ELASTOSIL® E41 TRANSPARENT 100000 mPa·s[6] 100000 mPa·s[6] 11.5 N/mm[1] 11.5 N/mm[1] 40[9] 40[9] 6.0 N/mm²[13] 6.0 N/mm²[13] 350 %[17] 350 %[17] - - Self-levelling - -
ELASTOSIL® E43 BLACK 250000 mPa·s[3] 250000 mPa·s[3] 11.5 N/mm[1] 11.5 N/mm[1] 30[9] 30[9] 6.5 N/mm²[14] 6.5 N/mm²[14] 500 %[18] 500 %[18] - Solvent-free - - -
ELASTOSIL® E43 N BLACK - - - - 30[9] 30[9] 7.5 N/mm²[11] 7.5 N/mm²[11] 500 %[15] 500 %[15] - - Thixotropic - -
ELASTOSIL® E43 N TRANSPARENT - - - - 30[9] 30[9] 7.8 N/mm²[11] 7.8 N/mm²[11] 450 %[15] 450 %[15] - - Thixotropic - -
ELASTOSIL® E43 TRANSPARENT 250000 mPa·s[7] 250000 mPa·s[7] 11.5 N/mm[1] 11.5 N/mm[1] 30[9] 30[9] 6.50 N/mm²[13] 6.50 N/mm²[13] 500 %[17] 500 %[17] - Solvent-free - - -
ELASTOSIL® E47 TRANSPARENT 600000 mPa·s[7] 600000 mPa·s[7] 10 N/mm[1] 10 N/mm[1] 37[9] 37[9] 4.5 N/mm²[14] 4.5 N/mm²[14] 450 %[18] 450 %[18] - MIL-A 46106 grade Non-slump, Thixotropic - -
ELASTOSIL® E50 N TRANSPARENT - - - - 35[9] 35[9] 2.6 N/mm²[11] 2.6 N/mm²[11] 200 %[15] 200 %[15] - MIL-A 46106 grade - - -
ELASTOSIL® N 2010 10.000 mPa·s[8] 10.000 mPa·s[8] - - 25[9] 25[9] 1 N/mm²[12] 1 N/mm²[12] 200 %[19] 200 %[19] - - Shear thinning, Self-levelling - -
ELASTOSIL® N 2034 30000 mPa·s[7] 30000 mPa·s[7] - - 35[9] 35[9] 2 N/mm²[12] 2 N/mm²[12] 200 %[19] 200 %[19] - Flame retardant - - -
ELASTOSIL® N 2189 250000 mPa·s[7] 250000 mPa·s[7] 5.0 N/mm[1] 5.0 N/mm[1] 45[9] 45[9] 1.5 N/mm²[12] 1.5 N/mm²[12] 200 %[19] 200 %[19] Oil resistant, Heat resistant Flame retardant Non-slump - -
ELASTOSIL® N 2199 950000 mPa·s[3] 950000 mPa·s[3] 6.5 N/mm[1] 6.5 N/mm[1] 30[9] 30[9] 2.5 N/mm²[12] 2.5 N/mm²[12] 400 %[19] 400 %[19] - MIL-A 46106 grade Non-slump - -
ELASTOSIL® N9111 BLACK 1000000 mPa·s[7] 1000000 mPa·s[7] 8.5 N/mm[2] 8.5 N/mm[2] 30[9] 30[9] 2.0 N/mm²[12] 2.0 N/mm²[12] 450 %[16] 450 %[16] - Flame retardant Non-slump, Thixotropic - -
ELASTOSIL® N9111 GREY 1000000 mPa·s[7] 1000000 mPa·s[7] 10 N/mm[2] 10 N/mm[2] 30[9] 30[9] 2.2 N/mm²[12] 2.2 N/mm²[12] 500 %[16] 500 %[16] - - Non-slump, Thixotropic - -
ELASTOSIL® N9111 WHITE 900000 mPa·s[3] 900000 mPa·s[3] 10 N/mm[2] 10 N/mm[2] 30[9] 30[9] 2.20 N/mm²[12] 2.20 N/mm²[12] 500 %[16] 500 %[16] - Flame retardant Non-slump, Thixotropic - -
ELASTOSIL® N9189 - - - - 40[9] 40[9] 2.8 N/mm²[11] 2.8 N/mm²[11] 300 %[15] 300 %[15] Heat resistant - Shear thinning, Non-slump - -
ELASTOSIL® RT 723 A/B 600000 mPa·s[4] 600000 mPa·s[4] 13.8 N/mm[1] 13.8 N/mm[1] - - 5.9 N/mm²[11] 5.9 N/mm²[11] 500 %[15] 500 %[15] Media resistant, Heat resistant, UV stable - - Fast curing under heat, Two-component, Addition Curing -
ELASTOSIL® RT 778 - - 7.0[1] 7.0[1] 50[9] 50[9] 3.5 N/mm²[11] 3.5 N/mm²[11] 120 %[15] 120 %[15] Heat resistant - Shear thinning, Non-slump Condensation-curing, Two-component, Fast curing at room temperature Self-adhesive, Electrically insulating
ELASTOSIL® RT 779 - - 9.5 N/mm[1] 9.5 N/mm[1] 50[10] 50[10] 2.8 N/mm²[11] 2.8 N/mm²[11] 250 %[15] 250 %[15] Oil resistant - Shear thinning, Thixotropic, Non-slump Condensation-curing, Two-component Self-adhesive, Electrically insulating
Legend
[1] Tear strength | ASTM D 624 B,  [2] Tear strength | ASTM D 624 B | 23°C / 2mm,  [3] Viscosity, dynamic D = 0,5 1/s | 25 °C | DIN EN ISO 3219,  [4] Viscosity, dynamic | 25 °C | 0.5 1/s | DIN EN ISO 3219,  [5] Viscosity, dynamic | 25 °C | DIN EN ISO 3219,  [6] Viscosity, dynamic D = 1 1/s | 25 °C | DIN EN ISO 3219,  [7] Viscosity, dynamic D = 0.5 1/s | 25 °C | DIN EN ISO 3219,  [8] Viscosity, dynamic | 25 1/s | ISO 3219,  [9] Hardness Shore A | DIN ISO 48-4,  [10] Hardness Shore A | ISO 1183-1 A,  [11] Tensile strength | ISO 37 type 1,  [12] Tensile strength | ISO 37 | Type 3 / 23°C / 2mm,  [13] Tensile strength | ISO 37 type 1 | Type 3 / 23°C / 2mm,  [14] Tensile strength | ISO 37 type 1 | Type 3 /23°C / 2mm,  [15] Elongation at break | ISO 37 type 1,  [16] Elongation at break | ISO 37 | Type 3 / 23°C / 2mm,  [17] Elongation at break | ISO 37 type 1 | Type 3 / 23°C / 2mm,  [18] Elongation at break | ISO 37 type 1 | Type 3 /23°C / 2mm,  [19] Elongation at break | ISO 37,  [] Suited,  [] Well suited,  [] Ideally suited