DOWSIL 9-1374
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- One-Part Low-Odor Neutral Cure
- Primerless Multi-Substrate Adhesion
- -55 to 180 deg C Flexibility
Product Description
DOWSIL™ 9-1374 Silicone Sealant is a one-part, 100% silicone adhesive-sealant supplied as a clear, non-slump paste. Its alkoxy neutral-cure system reacts with atmospheric moisture at room temperature to form a tough, flexible silicone rubber with low odor. The product provides good unprimed adhesion to many commonly used substrates, including wood, steel, aluminum, paints, and certain plastics. It is suited to flexible bonding between materials with different thermal expansion rates, including glass-to-metal, glass-to-plastic, and metal-to-plastic assemblies. The sealant is also used for formed-in-place gaskets and environmental sealing or protection of parts and substrates. Once cured, it remains stable and flexible from -55°C to 180°C (-67°F to 356°F).
Key features
- Neutral moisture cure: The one-part alkoxy silicone cures at room temperature with low odor and requires no component mixing.
- Flexible multi-substrate bonding: Good unprimed adhesion to many common materials supports assemblies combining substrates with different thermal expansion rates.
- Broad temperature range: The cured silicone remains stable and flexible from -55°C to 180°C (-67°F to 356°F).
Applications / Suitable for
- Flexible bonding of glass, metals, plastics, wood, and painted surfaces where supported by substrate testing
- Formed-in-place gaskets
- Environmental sealing and protection of parts and substrates
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Additional Information
As-supplied / before-processing properties
Typical values for the sealant as supplied and during initial room-temperature moisture cure. These values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Non-slump paste | — | As supplied; typical |
| Color | Clear | — | As supplied; typical |
| Extrusion rate | 340 | g/minute | CTM 0364 / ASTM D2452; 1/8 in (3.18 mm) nozzle at 90 psi (0.62 MPa) |
| Skin-over time | 5 | minutes | CTM 0098; typical |
| Tack-free time | 40 | minutes | CTM 0095; time to develop a non-tacky surface based on adhesion to polyethylene film |
After-processing / final-state properties
Typical mechanical properties after curing for seven 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 |
|---|---|---|---|
| Durometer hardness | 21 | Shore A points | ASTM C661; cured 7 days at 23°C (73°F) and 50% RH |
| Tensile strength | 237 | psi | CTM 0137A / ASTM D412; cured 7 days at 23°C (73°F) and 50% RH |
| Elongation | 401 | % | CTM 0137A / ASTM D412; cured 7 days at 23°C (73°F) and 50% RH |
| Modulus at 100% elongation | 64 | psi | CTM 0137A / ASTM D412; cured 7 days at 23°C (73°F) and 50% RH |
| Elongation at break | 300–550 | % | CTM 0137A / ASTM D412; cured 7 days at 23°C (73°F) and 50% RH |
| Stable and flexible temperature range | -55 to 180 (-67 to 356) |
°C (°F) |
Cured silicone; documented stability and flexibility range |
