DOWSIL 93-076-2

Harmonization Code : 2901.10.00.00 | Acyclic hydrocarbons; Saturated

DOWSIL 93-076-2

Main features

  • Two-Hour Mixed Work Window
  • 680 psi Cured Tensile Strength
  • 10:1 Controlled Mixing

Product Description

DOWSIL 93-076-2 RF Sealant mixes at 10:1 by weight to create a high-viscosity, two-part silicone elastomer sealant that cures at room temperature. The catalyzed material has a two-hour working time at 25 deg C and an extrusion rate of 35 g/min after two hours, providing a defined application window for controlled bead placement. It sets up in 24 hours and reaches optimum physical properties in five days. After 24 hours at 25 deg C and 50% relative humidity, the sealant has 680 psi tensile strength, 120 ppi Die B tear strength and 350% elongation; Shore A hardness reaches 46 after five days.

Key features

  • 10:1 base-to-catalyst mix: Provides a defined two-part preparation ratio by weight.
  • Two-hour working time: Supports controlled application before viscosity build.
  • High cured strength: Typical tensile strength is 680 psi with 120 ppi Die B tear strength.

Applications

High-performance sealing applications using a two-part room-temperature-cure silicone elastomer.

Product Family

DOWSIL 93-076-2

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Color
The color
Gray / Beige
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Two (Sealant base / Catalyst)
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
10/1
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
400 %
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
16 kV/mm
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
1x10¹³ Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical component and mixed-material properties. Values are not specifications.

Property Value Unit Method / condition
Base / curing-agent color Gray / turquoise As supplied
Mix ratio 10:1 Base to curing agent by weight
Working time 2 hr At 25 deg C
Extrusion rate 35 g/min Two hours after mixing; CTM0364
Set-up time 24 hr Room-temperature cure
Optimum property development 5 days Room-temperature cure
Shelf life 9 months At or below 32 deg C; original unopened containers
Technical properties

After-processing / final-state properties

Typical physical properties after 24 hours at 25 deg C and 50% relative humidity; hardness uses the five-day value.

Property Value Unit Method / condition
Durometer hardness 46 Shore A CTM0099 / ASTM D2240; five-day value
Tensile strength 680 psi CTM0137A / ASTM D412
Tear strength, Die B 120 ppi CTM0159A
Elongation at break 350 % After 24 hr at 25 deg C and 50% RH

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