DOWSIL 744 RTV 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
- One-Part Moisture-Cure Sealing
- 70 psi Cured Tensile Strength
- Primerless Aluminum Bonding
Product Description
DOWSIL™ 744 RTV Adhesive Sealant is a one-part, white, non-flowing moisture-cure silicone adhesive for bonding large components such as batteries and capacitors to circuit boards. It cures at room temperature without component mixing or mandatory oven processing, while optional heat acceleration can support faster in-line processing. After cure, the silicone elastomer combines 590% typical elongation with Shore A 37 hardness, providing flexibility and stress relief within bonded assemblies.
Key features
- One-part moisture cure: Requires no component mixing and cures at room temperature under ambient humidity.
- Non-flowing consistency: Supports controlled placement during manual or automated dispensing.
- Flexible cured elastomer: Provides 590% typical elongation and a tensile modulus of 70 psi for stress-relieving bonds.
Applications / Suitable for
- Bonding batteries to circuit boards
- Bonding capacitors to circuit boards
- Automated or manual dispensing processes
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Physical Properties
Electrical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical characteristics of the adhesive sealant before cure. Typical values are not intended for use as specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | White | — | As supplied; typical |
| Flow characteristic | Non-flowing | — | As supplied |
| Tack-free time | 55 | minutes | At 25°C; typical |
| Cure system | Moisture cure | — | One-part; normally cured at room temperature and 30–80% relative humidity |
| Shelf life | 12 | months | When stored at 25°C; typical |
After-processing / final-state properties
Typical properties of the cured silicone elastomer. Typical values are not intended for use as specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 1.42 | — | Cured material; typical |
| Durometer hardness | 37 | Shore A | Cured material; typical |
| Tensile strength | 395 | psi | 2.7 MPa; 28 kg/cm²; cured material; typical |
| Elongation | 590 | % | Cured material; typical |
| Tensile modulus | 70 | psi | 0.5 MPa; 5 kg/cm²; cured material; typical |
| Tear strength | 30 | ppi | Die B; 20 N/cm; cured material; typical |
| Unprimed lap-shear adhesion | 430 | psi | Aluminum substrate; 3 MPa; 29 kg/cm²; typical |
