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High-performance, one-component, moisture-curing silicone adhesive with excellent adhesion to glass, metals, and plastics.
Offers outstanding resistance to temperature extremes—from –40 °C to +180 °C—maintaining flexibility and bond integrity.
Low modulus formulation provides superior stress relief in dynamic or thermally cycling assemblies.
UL 94 HB rated for flammability compliance in electronic and electrical applications.
Non-corrosive, acetoxy-cure chemistry ensures compatibility with sensitive substrates including copper and aluminum.
Sealing and bonding of LED lighting housings and lens assemblies.
Structural adhesion in automotive exterior trim and sensor enclosures.
Mounting and potting of power electronics modules requiring thermal stability.
Bonding of architectural glazing components exposed to UV and weathering.
Assembly of medical device housings requiring biocompatibility-supporting materials (ISO 10993 tested).
| Chemical Type | Acetoxy-cure silicone polymer |
| Product Form | Paste, single-component |
| Appearance | Opaque white to off-white paste |
| Primary Applications | Structural bonding, sealing, and gasketing in demanding industrial environments |
| Key Features | Low modulus, high elongation (>200%), rapid surface cure (skin-over in ~15 min at 23 °C/50% RH) |
| Benefits | Reduces assembly stress, eliminates need for primers on most substrates, supports automated dispensing |
| Storage Stability | 12 months unopened at ≤25 °C in original sealed packaging |
| Standards Compliance | UL 94 HB, RoHS 2011/65/EU, REACH SVHC compliant |
Q1: What substrates does DOWSIL 280A adhere to effectively?
A: DOWSIL 280A exhibits strong adhesion to a broad range of substrates including glass, aluminum, stainless steel, and many engineering plastics. Surface preparation—such as cleaning and, where appropriate, priming—is recommended to achieve optimal bond performance.
Q2: Is DOWSIL 280A suitable for high-temperature applications?
A: Yes, DOWSIL 280A is formulated to maintain structural integrity and flexibility across a wide service temperature range, typically from –60 °C to +200 °C, with short-term exposure to higher temperatures possible depending on application conditions.
Q3: How long does it take for DOWSIL 280A to cure under standard conditions?
A: Cure time depends on ambient temperature, humidity, joint geometry, and thickness. 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 curing is possible with elevated temperature or controlled humidity.
Q4: Can DOWSIL 280A be painted over after curing?
A: Post-cure painting is feasible with many conventional solvent-based and water-based coatings, provided the adhesive is fully cured and the substrate surface is clean and compatible. Adhesion testing under actual application conditions is strongly recommended prior to full-scale implementation.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
