DOWSIL 6-1104 CV SILICONE SEALANT
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
Main features
- Low-Outgassing Vacuum Sealing
- 610% Cured Elongation
- One-Part Moisture-Cure Sealing
Product Description
DOWSIL™ 6-1104 CV Sealant is a one-part, nonflow, translucent moisture-cure RTV silicone sealant for sealing and bonding applications on space hardware. Its low level of volatile condensable materials supports use in high-vacuum environments, while 610% typical elongation provides flexibility for stress-relieving joints. The cured silicone also combines electrical insulation properties with a thermal conductivity of 0.2 W/m·K, making it suitable for aerospace and space-hardware assemblies requiring a flexible sealing or bonding material.
Key features
- Low volatile condensable content: Supports sealing and bonding applications in high-vacuum space environments.
- High elongation: Provides 610% typical elongation for flexible joints and stress relief after cure.
- Nonflow, one-part formulation: Enables application to localized sealing and bonding areas without component mixing.
Applications / Suitable for
- Sealing on space hardware
- Bonding on space hardware
- High-vacuum aerospace assemblies requiring a low-volatility silicone sealant
TDS, SDS & Technical Documents
- 11-1189-dowsil-6-1104-cv-sealant TDS
- 11-3982-01-dowsil-space-grade-silicone-sealants TDS
- DOWSIL™ 6-1104 CV SealantDOWSIL 6-1104 CV Sealant-Safety Data Sheet-EN
- 11-4421-01-imagine-the-frontiers-of-tomorrow
- 11-3921-01-advanced-silicone-adhesives-and-sealants (1)
- 11-3991-01-aerospace-defense-avionics-product-selection-guide (1)
Technical Specifications
General Properties
Color
Transclucent
The color
Specific Gravity
1.1
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.
Physical Properties
Viscosity
Non-flowing mPa.s
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
Mechanical Properties
Elongation
610 %
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.
Physical Properties
Skin Time
26 minutes
Tack-Free Time
64 minutes
Electrical Properties
Dielectric Strength
21 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
1.37 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 / before-processing properties
Typical characteristics of the sealant in its supplied state before moisture cure.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | Translucent / clear | — | As supplied; typical |
| Flow characteristic | Nonflow | — | As supplied |
| Cure system | Moisture-cure RTV | — | One-part room-temperature-vulcanizing silicone |
| Shelf life | 360 | days | Typical published value; storage conditions not specified in the supplied product overview |
Technical properties
After-processing / final-state properties
Typical properties of the cured sealant. Values are not intended as guaranteed specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Durometer hardness | 41 | Shore A | Cured sealant; typical |
| Elongation | 610 | % | Cured sealant; typical |
| Tensile strength | 925 | psi | Cured sealant; typical |
| Shear strength | 220 | psi | Cured sealant; substrate and test method not specified in the supplied product overview |
| Dielectric strength | 550 | V/mil | Cured sealant; typical |
| Volume resistivity | 1.37 × 1015 | Ω·cm | Cured sealant; typical |
| Dielectric constant | 2.59 | — | At 100 Hz; cured sealant; typical |
| Thermal conductivity | 0.2 | W/m·K | Cured sealant; typical |
