Optically Transparent Polymers for LED Encapsulation
Optically clear polymers allow light to pass through them without significant distortion. These materials are commonly used to protect LED circuitry from the harsh demands of outdoor environments, heat generation, liquid exposure, and hazardous environments. Our LED encapsulating materials are used to protect electronic circuitry in a variety of applications, including:
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LED drivers
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Power supplies
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LED lamps with integrated drivers
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Outdoor LED displays
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Automotive lighting
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Decorative and outdoor strip lighting
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Pool & spa lighting
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Emergency lighting & signaling
Wondering if we have what you’re looking for? We are happy to discuss your application needs.
Get a Quote Optically Clear Formulations
Optically Clear Compounds
Epic S7515 is a two-component optically clear aliphatic urethane compound. It has exceptional UV resistance. Low mixed viscosity and short gel time allow for easy air release and quick turnover of parts in high-volume production settings. It features a 1:2 volumetric mix ratio for easy adaptation to meter mix and dispensing machinery.
Perfect for high-volume production applications:
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High strength + high stiffness yields strong, lightweight results
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Low shrinkage allows for precision
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High adhesion forms tight, reliable bonds
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Thermal stability for tolerance of high temperatures
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Tough chemical resistance to acids, solvents and bases
Epic D9980 is a rigid, two-component aliphatic urethane casting material. It is designed to be UV stable, optically clear, and display minimal color change and high gloss retention after 1,000 hours of accelerated weathering tests. This product is used in applications that operate up to 130C.
Epic S7524 is a 2-component transparent, UL 94 V-0-recognized polyurethane potting compound. It is unfilled and excellent for applications requiring low mixed viscosity for better flow into tight tolerance areas. It is an excellent choice for white goods applications, sensor potting, switches, and control modules.
Popular Applications of Optically Clear Polymers
Custom Formulated Optically Clear LED Encapsulation Materials
Our epoxy and polyurethane resin formulations for LED encapsulation insulate fragile wire bonds from moisture, thermal shock, vibration, and other potentially damaging conditions while maintaining their optical properties. If one of our current products does not entirely fit your needs, we'll adjust or develop a formula to work with your unique product properties. Our fully equipped development and quality assurance labs allow us to create consistent and innovative solutions across the LED market.
| Product | UL Recognized | Mix Ratio by Weight (A:B) | Mix Ratio by Volume (A:B) | Mixed Viscosity @ 25°C, 20 RPM (cps) | Gel Time @ 25°C | Glass Transition Temp. (Tg) |
| Epoxies | ||||||
| R1055/H2083 | Yes | 100:18 | 3.25:1 | 2,300 - 3,300 | 300 - 360 Min (100 Grams) | 70 - 80 °C |
| S7512 | No | 100:9 | 100:22.1 | 4,000 - 5,000 | 150 - 260 Min (100 Grams) | 48 - 52 °C |
| S7513 | No | 100:14.2 | 4:1 | 2,500 - 3,500 | 100 - 250 Min (100 Grams) | 40 - 45 °C |
| Polyurethanes | ||||||
| D9980 | No | 100:97 | 1:1 | 300 - 600 | 10 - 20 Min (100 Grams) | 19 - 24 °C |
| S7144 | No | 100:43 | 3:1 | 250 - 350 | 25 - 35 Min (100 Grams) | (-21) - (-65) °C |
| S7302 | No | 100:19.5 | 4:1 | 2,500 - 3,500 | 45 - 55 Min (100 Grams) | (-70) - (-65) °C |
| S7475 | Yes | 100:17 | 4:1 | 3,500 - 4,500 | 40 - 50 Min (100 Grams) | -55 °C |
| S7478 | Yes | 100:8.52 | 100:12 | 5,000 - 7,000 | 25 - 35 Min (100 Grams) | (-5) - (-10) °C |
| S7515 | No | 51.5:100 | 1:2 | 500 - 700 | 5 - 10 Min (13 Grams) | 25 - 30 °C |
| S7524 | Yes | 100:58.4 | 2:1 | 170 - 230 | 20 - 35 Min (100 Grams) | (-19) - (-15) °C |
| S7527 | Yes | 100:16.7 | 5:1 | 3,000 - 4,000 | 30 - 50 Min (100 Grams) | (-2.5) - (-1.52) °C |
| Product | Coefficient of Thermal Expansion (CTE)(EXP‑6) in/in °C | Dielectric Strength (volts/mil) | Dissipation Factor (100 kHz) | Volume Resistivity (ohm‑cm) | Shore Hardness @ 25°C |
| Epoxies | |||||
| R1055/H2083 | 43 - 47 | 550 @ 0.080" | 0.020 - 0.022 | 1.90e+15 - 2.10e+15 | 85 - 90 D |
| S7512 | 34 - 37 | 410 @ 0.100" | 0.015 - 0.025 | 2.00e+15 - 2.50e+15 | 88 - 91 D |
| S7513 | 35 - 45 | 510 @ 0.100" | 0.020 - 0.040 | 1.50e+15 - 2.00e+15 | 84 - 87 D |
| Polyurethanes | |||||
| D9980 | 85 - 95 | 385 @ 0.100" | 0.014 - 0.018 | 1.00e+15 - 1.20e+15 | 75 - 80 D |
| S7144 | 190 - 210 | 420 @ 0.125" | 0.042 - 0.046 | 1.10e+13 - 1.20e+13 | 77 - 83 A |
| S7302 | 175 - 190 | 365 @ 0.125" | 0.020 - 0.030 | 2.40e+12 - 2.80e+12 | 68 - 72 A |
| S7475 | 355 - 365 | 472 @ 0.095" | 0.010 - 0.011 | 2.70e+12 - 2.80e+12 | 50 - 65 OO |
| S7478 | 100 - 130 | 450 @ 0.100" | 0.040 - 0.070 | 1.50e+12 - 2.00e+15 | 75 - 80 A |
| S7515 | 200 - 250 | 340 @ 0.100" | 0.040 - 0.060 | 1.00e+11 - 1.50e+11 | 30 - 35 D |
| S7524 | 285 - 295 | 422 @ 0.102" | 0.105 - 0.125 | 1.80e+12 - 2.00e+12 | 61 - 65 A |
| S7527 | 165 - 175 | 855 @ 0.033" | 0.025 - 0.032 | 3.10e+14 - 3.40e+14 | 88 - 92 A |