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Highly flexible, low-viscosity fluid silicone elastomer enabling easy processing via mixing, dispensing, or casting.
Excellent thermal stability with continuous service capability from –60 °C to 200 °C.
Fast room-temperature cure (RTV) without requiring heat or humidity—ideal for rapid prototyping and low-energy manufacturing.
Outstanding electrical insulation properties and dielectric strength for electronic encapsulation and protection.
Low compression set and high resilience after repeated mechanical stress, ensuring long-term sealing integrity.
Encapsulation and potting of sensitive electronics, including sensors, PCBs, and power modules.
Soft-touch overmolding for consumer device housings and automotive interior components.
Sealing and gasketing in medical devices requiring biocompatibility and sterilization resistance.
Flexible thermal interface materials (TIMs) for heat dissipation in LED lighting and power electronics.
Custom molded parts for wearable technology where skin contact compatibility and flexibility are critical.
| Chemical Type | Platinum-cured addition-cure liquid silicone rubber (LSR) |
| Product Form | Two-part liquid system (Part A + Part B) |
| Appearance | Clear, low-viscosity fluid (Part A); translucent catalyst fluid (Part B) |
| Primary Applications | Encapsulation, soft overmolding, sealing, thermal management |
| Key Features | RTV cure, excellent flowability, low shrinkage, high elongation |
| Benefits | Reduced cycle time, no by-products, consistent mechanical performance |
| Cure System | Platinum-based addition reaction |
| Shelf Life (unopened, 25 °C) | 12 months |
Q1: What is the primary function of DOWSIL SZ-1328 E in silicone elastomer formulations?
A: DOWSIL SZ-1328 E is a fluid silicone elastomer designed to act as a reactive processing aid and softening modifier. It integrates into the polymer network during curing, enhancing flow, reducing viscosity for improved mold filling, and contributing to final elastomer flexibility and surface smoothness.
Q2: Is DOWSIL SZ-1328 E compatible with both platinum-cure and peroxide-cure silicone systems?
A: Yes, it is formulated for broad compatibility with high-consistency rubber (HCR) and liquid silicone rubber (LSR) systems, including both platinum-catalyzed addition-cure and peroxide-initiated free-radical cure chemistries. Compatibility should be verified under actual processing conditions due to formulation-specific variables.
Q3: How does DOWSIL SZ-1328 E differ from non-reactive silicone oils used as release agents or lubricants?
A: Unlike non-reactive silicone oils, DOWSIL SZ-1328 E contains reactive silane or siloxane end-groups that covalently bond into the cured silicone matrix. This prevents bloom, migration, or surface contamination—making it suitable for applications where long-term stability and internal modification are required.
Q4: What are typical handling and storage recommendations for this product?
A: Store in tightly sealed original containers at temperatures between 10°C and 30°C, away from direct sunlight and moisture. Avoid prolonged exposure to elevated temperatures or atmospheric humidity prior to use, as this may affect reactivity or viscosity consistency over time.
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