DOWSIL 730 FS SOLVENT RESISTANT SEALANT
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- One-Component Sealing System
- Room-Temperature Sealing Cure
- Non-Sag Placement Control
Product Description
DOWSIL™ 730 FS Solvent Resistant Sealant is a one-component, solventless fluorosilicone adhesive/sealant supplied as a non-sag paste. The acetoxy-cure material reacts with atmospheric moisture at room temperature to form a tough, flexible rubber that retains its properties when exposed to fuels, oils, and solvents. Its paste consistency supports application on vertical and overhead surfaces, while the cured material remains stable and flexible across a documented temperature range of -65°C (-85°F) to 260°C (500°F). It is used for bonding, sealing, caulking, and formed-in-place gasketing where fluid exposure and demanding environmental conditions must be considered.
Key features
- Fuel, oil, and solvent resistance: Retains its properties under exposure to fuels, oils, and solvents and resists fluid-related swelling.
- One-component moisture cure: Ready-to-use acetoxy system cures at room temperature when exposed to moisture in the air.
- Non-sag paste consistency: Supports application on vertical and overhead surfaces without slumping or running.
Applications / Suitable for
- Bonding and sealing where resistance to fuels, oils, and solvents is required
- Assembly and repair of fuel systems and tanks
- Formed-in-place gaskets for irregular shapes and harsh service conditions
- Components exposed to moisture, vibration, shock, fuels, oils, and solvents
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
Typical values for the material as supplied. These values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Non-slump paste | — | CTM 0176 |
| Color | White | — | As supplied |
| Extrusion rate | 321 | g/minute | CTM 0364; 3.2 mm orifice at 0.62 MPa (1/8 in orifice at 90 psi) |
| Skin-over time | 12 | minutes | CTM 0098 |
| Tack-free time | 14 | minutes | CTM 0095 |
After-processing / final-state properties
Typical mechanical properties after curing for 7 days in air at 23°C (73°F) and 50% relative humidity. These values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 1.44 | — | CTM 0022 / ASTM D792 |
| Durometer hardness | 40 | Shore A | CTM 0099 / ASTM D2240 |
| Tensile strength | 3.0 (434) | MPa (psi) | CTM 0137A / ASTM D412 |
| Elongation at break | 195 | % | CTM 0137A / ASTM D412 |
| Tear strength | 11.9 (68) | kN/m (ppi) | CTM 0159A / ASTM D624, die B |
| Peel strength | 6.8 (39) | kN/m (ppi) | CTM 0293; primed aluminum |
