DowSil 3-6077 RTV Silicone Ablative
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- 0.035 mm/s Ablation Penetration Rate
- 2 to 3-Hour Working Window
- Spray or Trowel Application
Product Description
DOWSIL™ 3-6077 RTV Silicone Ablative is a two-part, non-slumping silicone elastomer developed for aerospace ablative protection. The room-temperature-curing system can be sprayed or trowelled for use as an ablative coating, thermal barrier, high-temperature pressurization sealant, or rocket liner. It combines low thermal conductivity with flexibility across temperature extremes and forms a moderately tough char that can be removed after exposure to support surface cleaning and recoating.
Key features
- Ablative thermal protection: Provides a documented penetration rate of 0.035 mm/s under an oxy-acetylene torch exposure of 45 W/cm².
- Room-temperature cure: Uses a 10:1 base-to-catalyst mix ratio by weight and cures in 24 hours at 25 °C.
- Flexible application: Non-slumping material can be sprayed, trowelled, applied with a spatula, or dispensed from a pressure gun.
Applications / Suitable for
- Protection of launch structures exposed to direct rocket blast
- Ablative coatings and thermal barriers
- High-temperature pressurization seals
- Rocket liner applications
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical uncured and processing properties of DOWSIL™ 3-6077 RTV Silicone Ablative. Typical technical data are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product form | Two-part, non-slumping silicone elastomer | — | As supplied |
| Consistency | Viscous liquid | — | As supplied |
| Color | White base / blue catalyst | — | As supplied |
| Base viscosity | 1,900,000 | mPa·s | CTM 0050 / ASTM D1084; at 25 °C |
| Mixing ratio | 10 base : 1 catalyst | by weight | Catalyzed mixture |
| Relative density | 1.58 | — | CTM 0022; mixed 10:1 by weight at 25 °C |
| Working time | 2–3 | hours | After catalyst addition at approximately 25 °C |
| Cure time | 24 | hours | At 25 °C |
| Usable life | 12 | months | Original unopened containers stored at or below 32 °C |
After-processing / final-state properties
Typical cured properties of DOWSIL™ 3-6077 RTV Silicone Ablative after seven days at room temperature, except where otherwise noted. Typical technical data are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Tensile strength | 4.2 | MPa | CTM 0137A / ASTM D412; cured 7 days at room temperature |
| Elongation at break | 50 | % | CTM 0137A / ASTM D412; cured 7 days at room temperature |
| Durometer hardness | 73 | Shore A | CTM 0099 / ASTM D2240; cured 7 days at room temperature |
| Deep-section cure | Yes | — | 25 mm thickness |
| Thermal conductivity | 0.29 | W/(m·K) | Cured material; test method not stated |
| Specific heat | 1.04 | kJ/(kg·K) | At 25 °C; test method not stated |
| Ablation penetration rate | 0.035 | mm/s | Oxy-acetylene torch exposure at 45 W/cm² |
| Char retention | Fair | — | Oxy-acetylene torch exposure at 45 W/cm² |
