DOWSIL 866 PRIMERLESS SILICONE ADHESIVE

Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other

DOWSIL 866 PRIMERLESS SILICONE ADHESIVE

Main features

  • Primerless Silicone Adhesion
  • Durable Silicone Formulation
  • EV/Automotive Component Assembly

Product Description

DOWSIL™ 866 Primerless Silicone Adhesive is a specialized silicone adhesive designed to provide robust bonding without the need for primer application. Suitable for evaluation in various industrial and automotive manufacturing contexts, including electric vehicle (EV) component assembly, this adhesive helps streamline production processes. Its reliable silicone chemistry ensures durable performance in demanding assembly and operational environments.

Key features

  • Primerless adhesion: Streamlines manufacturing processes by eliminating the need for separate primer preparation steps.
  • Durable silicone chemistry: Provides long-lasting reliability and environmental resistance for demanding applications.
  • EV component suitability: Supports advanced automotive assembly and electric vehicle manufacturing requirements.

Applications / Suitable for

  • Electric vehicle (EV) applications
  • Automotive component assembly
  • Industrial bonding operations
Product Family

DOWSIL 866

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Color
The color
Gray
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
1K
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.29
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
48,000 mPa.s
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.
210 %
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.
20 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.
2.00 E+15 Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical properties; these values are not intended for use in preparing specifications.

Property Value Unit Method / condition
Color Gray - One-part
Viscosity 48,000 cP -
Heat Cure Time 60 minutes at 125°C
Heat Cure Time 30 minutes at 150°C
Technical properties

After-processing / final-state properties

Typical properties; these values are not intended for use in preparing specifications.

Property Value Unit Method / condition
Specific Gravity 1.29 - Cured
Durometer 57 Shore A -
Tensile Strength 925 psi -
Elongation 210 % -
Tear Strength 25 ppi Die B
Unprimed Adhesion - Lap Shear 774.5 psi To Aluminum
Dielectric Strength 500 volts/mil -
Volume Resistivity 2.00E+15 Ohm-cm -

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