DUROPTIX OE-6351 Optically Clear Two-Part Silicone LED Encapsulant for LED Package & Lens Molding
DUROPTIX OE-6351 Optically Clear Two-Part Silicone LED Encapsulant for LED Package & Lens Molding
DUROPTIX OE-6351 is a two-part, 1:1 mix ratio, addition-cure optically transparent silicone encapsulant with low viscosity, self-priming adhesion and 24-hour pot life at 25°C, cured to Shore A 52 (JIS).
Designed for the demanding LED market, DUROPTIX OE-6351 offers high purity, moisture resistance, thermal stability and >98% optical transparency at 450 nm. The silicone absorbs thermally induced stresses inside LED packages, protecting the die and bond wires, and withstands lead-free reflow temperatures, making it suitable for modern LED assembly processes.
| Property | Unit | Value |
|---|---|---|
| Viscosity (Part A / Base) | mPa·s (cP) | 3100 |
| Viscosity (Part B / Catalyst) | mPa·s (cP) | 2400 |
| Viscosity (Mixed) | mPa·s (cP) | 2800 |
| Specific Gravity (Uncured Part A / Part B) | — | 1.02 |
| Refractive Index | — | 1.41 |
| Working Time / Pot Life @ 25°C | hr | 24 |
| Durometer Shore A (JIS) | — | 52 |
| Heat Cure Time @ 150°C | min | 180 |
| Unprimed Lap Shear Adhesion (Glass) | MPa | 2.5 |
| Dielectric Strength | kV/mm | 28 |
| Dielectric Constant @ 1 MHz | — | 3.0 |
| Dissipation Factor @ 1 MHz | — | 0.0012 |
| Volume Resistivity | Ω·cm | 1.4 × 10¹⁶ |
| Linear CTE | ppm/°C | 300 |
| Impurity Na⁺ / K⁺ | ppm | 0.2 |
| Impurity Cl⁻ | ppm | 0.5 |
| Transparency @ 450 nm, 1 mm thick | % | 98 |
| Shelf Life @ 35°C (unopened) | months | 6 |
- Low Viscosity & Easy Processing: Part A ~3100 cP, Part B ~2400 cP, mixed ~2800 cP — enables smooth dispensing and bubble release in automated equipment.
- Self-Priming / No Primer Needed: Achieves unprimed lap shear adhesion of 360 psi (2.5 MPa) to glass, good bonding to Ag-plated leads and PPA without primer.
- Optical & Electrical Excellence: Refractive Index 1.41, Dielectric Strength 700 V/mil (28 kV/mm), Volume Resistivity 1.4×10¹⁶ Ω·cm.
- Wide Service Temp: Operational from –45°C to 200°C long term; thermal cycling down to –55°C can be evaluated per application.
DUROPTIX® OE-6351 is used for encapsulation and lens molding of SMD LEDs, high-power LED packages, COB (Chip-on-Board) modules, and automotive / general lighting LED units requiring long-term heat & UV resistance and non-tacky high-hardness finish. It is also suitable for optical component potting where high clarity and stress relief are needed.
FAQ:
1. Who are we?
We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a professional industrial adhesives and sealants supplier based in China since 2018. we serve global markets: Mainland China (60%), Southeast Asia (20%), North America (10%), and Europe (10%).
2. What products do you offer?
we supply high-performance adhesives and sealants from global leaders including: Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.
3. How do you guarantee product quality?
Quality assurance through: Mandatory pre-production samples approval Final inspection by QC team before shipment International certifications: SGS, UL, FDA, RoHS, REACH
4. Why choose us over other suppliers?
Reliable Supply:Authentic products from top manufacturers Expert Support:Technical guidance for product selection Global Compliance:Certifications meeting target market standards Efficient Service:Customized solutions & professional support
5. What services do you provide?
Delivery:EXW/FOB/CIF Payment:USD/EUR/CNY/HKD via T/T, L/C Support:Technical consultation & logistics coordination
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