High-performance, one-component, moisture-curing silicone adhesive with excellent adhesion to diverse substrates including glass, aluminum, stainless steel, and painted surfaces.
Offers outstanding resistance to thermal cycling, UV exposure, and weathering—maintaining flexibility and bond integrity from –55 °C to +200 °C.
Low modulus formulation provides superior stress relief for bonded assemblies subject to vibration, expansion, or contraction.
Non-corrosive, acetoxy-cure chemistry ensures compatibility with sensitive electronic components and avoids copper corrosion.
Good flow and thixotropic behavior enables precise application via manual or automated dispensing systems without sagging.
Structural bonding and sealing of architectural glazing systems, including insulating glass (IG) units and curtain wall assemblies.
Adhesion of LED modules, power electronics, and heat sinks in lighting and energy-efficient equipment.
Sealing and bonding of automotive lighting housings, sensors, and under-hood components requiring long-term environmental stability.
General-purpose industrial assembly where high elasticity, thermal resilience, and substrate versatility are critical.
Electrical insulation and encapsulation of low-voltage control panels and junction boxes exposed to outdoor conditions.
| Chemical Type | Acetoxy-cure silicone polymer |
| Product Form | Paste, thixotropic, one-component |
| Appearance | Opaque white to off-white viscous paste |
| Primary Applications | Structural glazing, electronics assembly, automotive lighting, industrial sealing |
| Key Features | Low modulus, non-corrosive, UV-stable, wide service temperature range |
| Benefits | Stress absorption, long-term durability, easy processing, broad substrate adhesion |
| Cure Mechanism | Moisture-cured at ambient temperature |
| Shelf Life (unopened) | 12 months at ≤25 °C in original sealed container |
Q1: What substrates does DOWSIL SE 9140 bond well to?
A: DOWSIL SE 9140 exhibits strong adhesion to a broad range of substrates including glass, aluminum, stainless steel, and many engineering plastics such as polycarbonate and ABS. Surface preparation—such as cleaning and, where appropriate, priming—is recommended to optimize bond performance.
Q2: Is DOWSIL SE 9140 suitable for high-temperature applications?
A: Yes, DOWSIL SE 9140 is formulated to maintain structural integrity and adhesion across an extended temperature range, typically from −55 °C to +200 °C continuously, with short-term exposure up to 250 °C possible depending on application conditions.
Q3: How long does it take for DOWSIL SE 9140 to cure under standard conditions?
A: Cure time depends on ambient humidity, temperature, and joint geometry. Under typical room-temperature conditions (23 °C, 50% RH), surface tack-free time is generally achieved within 30–60 minutes, while full cure may require several days. Accelerated cure can be achieved with elevated temperature or controlled humidity environments.
Q4: Can DOWSIL SE 9140 be painted over after curing?
A: Yes, fully cured DOWSIL SE 9140 is compatible with many solvent-based and waterborne industrial coatings. It is advisable to verify coating compatibility and adhesion through preliminary testing, especially when using specialty or high-performance paint systems.
Q5: Does DOWSIL SE 9140 release acetic acid during cure?
A: No, DOWSIL SE 9140 is a neutral-cure silicone adhesive that releases methanol—not acetic acid—during crosslinking. This makes it non-corrosive to sensitive metals and electronics, and suitable for use in enclosed or poorly ventilated assemblies.
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E-mail: wangxingqiang@ericwchem.com
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