DOWSIL 6-1125
Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium
Main features
- 0.025% Volatile Condensable Material
- 680% Cured Elongation
- 2.7 MPa Primed Aluminum Lap Shear
Product Description
DOWSIL 6-1125 CV Sealant is a one-part, white, non-flowing silicone adhesive/sealant for high-temperature space-grade sealing and bonding. It requires no component mixing and can be dispensed manually or by automated needle equipment. Typical extrusion rate is 94 g/min, with 25-minute skin-over time and 65-minute tack-free time at 25 deg C. Typical cured tensile strength is 6.8 MPa. ASTM E595 testing gives typical total mass loss of 0.3% and volatile condensable material of 0.025%.
Key features
- Volatile condensable material: ASTM E595 testing gives typical volatile condensable material of 0.025%.
- Cured elongation: Typical cured elongation is 680%.
- Primed-aluminum bond strength: Typical lap shear is 2.7 MPa on primed aluminum.
Applications
High-temperature space-grade sealing and adhering.
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
Extrusion Rate
94 g/min
Tack-Free Time
65 minutes
General Properties
Specific Gravity
65
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.
Mechanical Properties
Elongation
680 %
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.
Electrical Properties
Dielectric Strength
22 kV/mm
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.
Volume Resistivity
1.27 E+15 Ohms⋅cm
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.
Thermal Properties
Thermal Conductivity
0.2 W/m.K
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance.
Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
Additional Information
Technical properties
As-supplied sealant properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Extrusion rate | 94 | g/min | Typical |
| Skin-over time | 25 | min | Typical; 25 deg C |
| Tack-free time | 65 | min | Typical; 25 deg C |
| Shelf life | 12 | months | At 25 deg C |
Technical properties
Cured sealant properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 1.1 | Typical; cured | |
| Tensile strength | 6.8 | MPa | Typical |
| Elongation | 680 | % | Typical |
| Tensile modulus | 1 | MPa | Typical |
| Tear strength | 134 | N/cm | Typical; Die B |
| Hardness | 43 | Shore A | Typical |
| Primed lap shear | 2.7 | MPa | Typical; primed aluminum |
| Thermal conductivity | 0.2 | W/(m K) | Typical |
