company tower banner
Wacker Chemie AG Company Logo

ELASTOSIL® SC 870 A/B

1 of 230 products in this brand
ELASTOSIL® SC 870 A/B is a two-part silicone rubber designed for creating a thixotropic, addition-curing foam. The foam structure consists primarily of closed cells. This product is particularly well-suited for use with automatic dispensing equipment during processing. Its exceptional rheology allows for the production of CIPG foam gaskets, even in complex 3D geometries.

Foam Type: 2K System, Closed Cell Foam

Density: 1050.0 - 1050.0 kg/m³

Chemical Family: Silicones

End Uses: Automatic Dispensing Equipment, Automotive Interior Trim, Cure In Place Foam Gasket, Gaskets

Physical Form: Foam

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Special Features
  • Compressible
  • Foam
  • Heat resistant
  • Thixotropic
  • Two-component

Applications & Uses

Applications
  • Appliances Industry
  • Automotive Electronics
  • Automotive, Aerospace & Railway
  • Cured-In-Place-Gaskets (Dry Type)
  • Industrial Assembly
  • Transportation
Application Details
  • General purpose foam for gaskets (dispensed foam gaskets)
  • Especially suitable for 3-dimensional gasket bead
  • General purpose high and low temperature resistant sealing material
  • Suitable for nvh insulation

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Low Heat of Reaction max. 40 °C
Catalyst Properties
ValueUnitsTest Method / Conditions
Mix Ratio (A:B)1:1parts by weight
Pot Life (A+B, at 25°C, Dynamic Viscosity, Shear rate 1 s⁻¹; up to 200 Pa.s)150secondsISO 3219
Tack-Free Time (A+B)10 - 15minutes
Cured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)0.35 - 0.4 g/cm³DIN EN ISO 1183-1 A
Elongation (at break)100%ISO 1798
Shore Hardness 00 (with skin)40 - 60ASTM D 2240
Shore Hardness A (with skin)8 - 12DIN ISO 48-4
Tensile Strength350kPaISO 1798
Uncured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C, Componenet A)1.05g/cm³DIN EN ISO 2811-1
Density (at 23°C, Componenet B)1.05g/cm³DIN EN ISO 2811-1
Dynamic Viscosity (Component A, at 23°C, Spindle 5, 2.5 Upm)40000mPa·sBrookfield
Dynamic Viscosity (Component B, at 23°C, Spindle 5, 2.5 Upm)50000mPa·sBrookfield
Properties
  • Good processability on automated dispensing equipment
  • Easy control of mixing quality due to different colors of the components
  • No ozone damaging blowing agents
  • No release of toxic or strong smelling substances during foaming or curing
  • Low heat of reaction (max. 40 °C)
  • Low toxicity of thermal decomposition products
  • Long-term flexible over a temperature range of -50 °C to +180 °C
  • Good chemical resistance
  • Fast foaming and cure
  • Medium foam density
Note

Curing conditions: 15 min / 50°C, conditioning min. 24 h at 23 °C / 50 % relative humidity for cured properties.

Regulatory & Compliance

Certifications & Compliance

Safety & Health

Safety Note

According to the latest findings, the addition-curing silicone rubber ELASTOSIL® SC 870 A/B contains neither toxic or corrosive substances which would require special handling precautions.

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania