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SILASTIC™ 8257 Silicone Foam

Silicone Rubber

The Dow Chemical Company

Product Description

SILASTIC 8257 Silicone Foam is a  low hardness product, primarily  developed as a dispensed ‘foamed-inplace’ gasket material for the  automotive and industrial assembly &  maintenance industries. When the A and B liquid components are  thoroughly mixed in a 1:1 ratio by  volume, the product will expand and  cure to a foamed elastomer in  approximately 10 minutes at room  temperature. This foam has a fine cell  structure and works as a seal or gasket  where long service life, chemical  resistance, good weatherability and  low compression set are required. The  hardness makes the product suitable  for applications with low clamping  pressure. Furthermore, the inherent  properties of a silicone elastomer  mean that the product can be used  over a broad temperature range. The  material expands without employing  ozone depleting CFCs or other related  blowing agents.


FEATURES & BENEFITS

•Low hardness (Shore 00) • User-friendly, easy to handle 1:1  mix ratio • Fast ambient temperature cure, no  need for temporary storage of  equipped parts • Does not contain chlorofluorocarbons (CFCs) • Low compression set (post-cured)  which is retained at high service  temperatures • Stable and flexible over a wide  temperature range


APPLICATIONS 

• SILASTIC™ 8257 Silicone Foam is designed to be dispensed and cured  directly on parts to form an integrated compression gasket • Typical applications include automotive parts, housings for electric devices,  exterior lighting, domestic appliance components and tile-printing-rollers.

General
Original Document
Technical Datasheet(English)
Features
Good Adhesion
Foamable
Specifications
Physical Value/Unit(Sign in to View) Test Standard Test Condition

Density/Specific Gravity

*** g/cm³ Internal

Density/Specific Gravity

*** g/cm³ Internal

Density/Specific Gravity

***~*** g/cm³ Internal
cured

Viscosity

***~*** Pa-s Internal

Viscosity

***~*** Pa-s Internal
Mechanical Value/Unit(Sign in to View) Test Standard Test Condition

Compression Set

*** % Internal
50% compression, 22 hours at 70°C non-post-cured

Compression Set

*** % Internal
50% compression, 22 hours at 70°C post-cured
Hardness Value/Unit(Sign in to View) Test Standard Test Condition

Shore OO hardness

*** OO Internal
cured

The information presented on this datasheet was acquired by AjiEng.com from the producer of the material. AjiEng.com makes substantial efforts to assure the accuracy of this data. However, AjiEng.com assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.