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High-performance silicone elastomer blend offering excellent thermal stability across -60 °C to 200 °C.
Low compression set for long-term sealing integrity in dynamic and static applications.
Good adhesion to common substrates including metals, plastics, and coated surfaces without primer.
Fast room-temperature cure with controlled pot life for efficient manufacturing processing.
Meets UL 94 HB flammability rating and complies with RoHS and REACH requirements.
Automotive under-hood gaskets and vibration-damping mounts.
Electronics encapsulation and protective coatings for sensors and connectors.
Industrial sealing solutions for HVAC components and fluid-handling systems.
Medical device housings requiring biocompatibility support (ISO 10993-5 tested).
Consumer appliance seals exposed to repeated thermal cycling and mechanical stress.
| Chemical Type | Platinum-cured addition-cure silicone elastomer blend |
| Product Form | Two-component liquid system (Part A + Part B) |
| Appearance | Translucent, low-viscosity liquid (Part A); translucent, low-viscosity liquid (Part B) |
| Primary Applications | Sealing, bonding, encapsulation, and damping |
| Key Features | Thermal stability, low compression set, primerless adhesion, fast RT cure |
| Benefits | Reduced assembly time, extended service life, design flexibility, regulatory compliance |
| Cure Mechanism | Platinum-catalyzed hydrosilylation at room temperature or elevated temperature |
| Shelf Life | 12 months from date of manufacture when stored unopened at 5–25 °C |
Q1: What is the primary function of DOWSIL EL-9240 in silicone formulations?
A: DOWSIL EL-9240 is a pre-blended silicone elastomer system designed to enhance soft-touch feel, improve surface slip, and provide controlled release properties in high-consistency rubber (HCR) and liquid silicone rubber (LSR) compounds.
Q2: Is DOWSIL EL-9240 compatible with both platinum-cured and peroxide-cured silicone systems?
A: Yes, DOWSIL EL-9240 is formulated for broad compatibility with common silicone curing chemistries, including both platinum-catalyzed addition-cure and peroxide-initiated free-radical cure systems. Compatibility should be verified under actual processing conditions.
Q3: How is DOWSIL EL-9240 typically incorporated into silicone compounds?
A: It is generally added during the mixing stage—either during masterbatch preparation or as a final blend component—using standard dispersion equipment such as two-roll mills or internal mixers. Good mechanical shear helps ensure uniform distribution.
Q4: Does DOWSIL EL-9240 affect the thermal stability or compression set performance of cured silicone parts?
A: When used within recommended dosage ranges, DOWSIL EL-9240 maintains the inherent thermal resilience of the base silicone matrix and does not significantly compromise compression set resistance. Performance may vary depending on overall formulation and cure profile.
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E-mail: wangxingqiang@ericwchem.com
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