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High-performance, two-part addition-cure silicone elastomer blend offering excellent processability and low viscosity for easy mixing and dispensing.
Provides outstanding thermal stability and long-term compression set resistance across a wide temperature range (–60 °C to 200 °C).
Delivers superior electrical insulation properties with high dielectric strength and volume resistivity.
Exhibits excellent adhesion to various substrates including plastics, metals, and glass without primers.
Meets UL 94 V-0 flammability rating when formulated and cured per recommended conditions.
Encapsulation and potting of high-voltage power electronics and EV battery modules.
Sealing and gasketing in demanding automotive under-hood environments.
Thermal interface materials (TIMs) for heat-sensitive LED lighting assemblies.
Flexible, electrically insulating coatings for medical device sensors and wearable electronics.
Soft-touch overmolding on rigid plastic or metal components in consumer electronics housings.
| Chemical Type | Platinum-catalyzed addition-cure silicone elastomer blend |
| Product Form | Two-component liquid system (Part A + Part B) |
| Appearance | Clear to translucent viscous liquids (Part A), colorless to pale yellow liquid (Part B) |
| Primary Applications | Encapsulation, potting, sealing, gasketing, and soft-touch overmolding |
| Key Features | Low viscosity, fast cure at elevated temperatures, excellent adhesion, UL 94 V-0 rated |
| Benefits | Reduced void formation, improved thermal cycling reliability, simplified processing without primers |
| Cure System | Addition-cure (hydrosilylation); inhibited at room temperature, accelerated above 80 °C |
| Shelf Life (unopened) | 12 months at ≤25 °C in original sealed containers |
Q1: What is the primary function of DOWSIL EL-9081 in silicone formulations?
A: DOWSIL EL-9081 is a pre-compounded silicone elastomer blend designed to enhance softness, elasticity, and surface tack control in cured silicone rubber systems—particularly for high-clarity, skin-contact, or medical-grade applications where consistent mechanical performance and processing stability are critical.
Q2: Is DOWSIL EL-9081 compatible with both addition-cure and condensation-cure silicone systems?
A: Yes, DOWSIL EL-9081 is formulated for broad compatibility across platinum-catalyzed (addition-cure) and tin-catalyzed (condensation-cure) silicone elastomers, though optimal dispersion and cure response may vary depending on base polymer viscosity, catalyst type, and mixing protocol.
Q3: How should DOWSIL EL-9081 be incorporated into a silicone compound?
A: It is typically added during the high-shear mixing stage after base polymer and fillers, and before catalyst introduction. Thorough dispersion—often achieved via roll milling or high-speed dispersers—is recommended to ensure uniform phase distribution and avoid localized soft spots in the final elastomer.
Q4: Does DOWSIL EL-9081 require post-cure to achieve full property development?
A: While full physical properties develop after standard thermal cure, a controlled post-cure step (e.g., 2–4 hours at elevated temperature) is often beneficial to maximize crosslink density, reduce volatile content, and improve long-term compression set resistance—especially in demanding sealing or biomedical applications.
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