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High-performance, one-component, moisture-curing silicone elastomer offering excellent adhesion to diverse substrates including metals, plastics, and glass.
Low modulus and high elongation enable superior stress relief and vibration damping in dynamic assemblies.
Excellent resistance to thermal cycling, UV exposure, and weathering for long-term outdoor reliability.
Low volatility and low odor formulation suitable for enclosed or sensitive electronic environments.
RoHS compliant and meets UL 94 HB flammability requirements for electronics safety.
Encapsulation and potting of power electronics, including inverters, converters, and EV battery control units.
Structural bonding and sealing of LED lighting housings and optical modules exposed to outdoor conditions.
Vibration-damping mounting of sensors, actuators, and automotive infotainment components.
Gap-filling thermal interface material (TIM) for heat-sensitive electronics requiring mechanical compliance over rigid TIMs.
Sealing of industrial control enclosures and renewable energy system junction boxes.
| Chemical Type | Condensation-cure, acetoxy-functional silicone elastomer |
| Product Form | Paste-like, thixotropic, ready-to-use compound |
| Appearance | Opaque white to off-white viscous paste |
| Primary Applications | Encapsulation, bonding, sealing, and vibration damping in electronics and industrial equipment |
| Key Features | Moisture-curing, low modulus, high elongation (>300%), non-corrosive cure byproducts |
| Benefits | Stress relief under thermal expansion mismatch, no primer required on most substrates, room-temperature cure |
| Storage Stability | 12 months unopened at ≤25°C in original sealed container |
| Standards Compliance | RoHS 2015/863/EU, UL 94 HB, REACH SVHC-free |
Q1: What is the primary function of DOWSIL SE 4402 Silicone in industrial coatings and inks?
A: DOWSIL SE 4402 Silicone is a reactive silicone additive designed to enhance substrate wetting, improve leveling, and reduce surface defects such as craters and orange peel—without compromising intercoat adhesion or film integrity.
Q2: Is DOWSIL SE 4402 Silicone compatible with both solvent-borne and water-borne systems?
A: Yes—it exhibits broad compatibility across solvent-borne, high-solids, and water-borne coating and ink formulations, including acrylics, polyurethanes, and epoxy-based systems. Compatibility should always be verified under actual formulation conditions.
Q3: How is DOWSIL SE 4402 Silicone typically incorporated into a formulation?
A: It is generally added during the let-down stage, after pigments and resins have been dispersed. Pre-dilution in a compatible solvent or carrier resin may aid uniform incorporation, especially in low-shear mixing environments.
Q4: Does DOWSIL SE 4402 Silicone contribute to long-term surface hydrophobicity or anti-blocking performance?
A: While it improves initial surface migration and slip characteristics, its reactive nature means it covalently bonds into the polymer matrix upon cure—resulting in durable surface modification rather than a migratory, leachable layer. Anti-blocking benefits are formulation- and cure-dependent.
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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
