Low-Viscosity PU Potting for Outdoor LED Lighting – 3-Year UV Guarantee 3328-6
BZ-3328-6 is a transparent, weather-resistant PU encapsulant for LED point sources, linear fixtures, and outdoor luminaires. Its ultra-low viscosity (300–500 mPa·s at 25°C) enables deep, void-free coverage of sensitive electronics with IP67/IP68 waterproof sealing. Curable at room temperature or with heat, it forms a resilient layer (Shore A ~65) that bonds well to metals and plastics. Anti-yellowing chemistry ensures 3-year outdoor clarity while shielding LEDs and PCBs from moisture, dust, and mechanical stress.
Key Product Features
- High-Fluidity Processing: Two-component PU with excellent flow for easy handling and complete encapsulation.
- Eco-Certified: Fully meets RoHS and REACH requirements.
- Accelerated Curing: Heat-assisted option to shorten turnaround.
- 3-Year Outdoor Rating: Proven UV stability and weatherability for 3 years of outdoor exposure.
- Flex & Crack Resistance: Superior elasticity and fracture toughness under thermal and mechanical strain.
Technical Parameters
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Parameters |
Hardener BZ-3328-6 A |
Resin BZ-3328-6 B |
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Before curing |
Appearance |
Clear liquid |
Clear liquid |
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Viscosity(mPa·s.25℃) |
1200±500 |
200±100 |
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Initial mixed viscosity(mPa·s.25℃) |
400±200 |
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Density(g/cm³.25℃) |
1.09±0.05 |
0.98±0.05 |
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Mixing&Curing
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Mix ratio(by weight) |
A:B=1:1 |
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Pot life 130±30g(min.25℃) |
15-30min |
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Curing condition |
Room temperature curing |
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Surface drying time 30g(H.25℃) |
3±1 |
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Curing time 30g(H.25℃) |
5±1 |
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Curing time 30g(Heated) |
60℃ heated ≤1H |
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After curing
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Hardness (Shore A) |
58±10 |
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Temperature resistance(℃) |
-40~85℃ |
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Water absorption(24H) |
≤1.0% |
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Surface resistivity (Ω/sq) |
≥1.0×1012 |
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Volume resistivity (Ω.cm) |
≥1.0×1012 |
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Tensile strength(MPa) |
≤3 |
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Elongation at break(%) |
≥80% |
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Dielectric constant(at 50Hz) |
≥8 |
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Breakdown voltage(kV/mm)
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≥14 |
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Product Applications
- LED linear light : operating temperature range of-40 to 85°C with 3-year outdoor yellowing resistance;
- LED light source: The cured colloid exhibits high transparency while providing protective encapsulation for LED chips. It demonstrates strong adhesion to both plastic and metal casings, with IP67/IP68 waterproof ratings ensuring suitability for aquatic environments including riverbanks.
- Sensors: It has excellent waterproof and moisture-proof performance, and the low stress characteristics can provide effective protection for the internal electronic components.
Directions for Use
Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
Accurate Proportioning: Manual operation requires precise mixing according to the specified ratio and recording. Machine potting requires calibrated ratios and first-article confirmation is recommended.
Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
Curing: Allow the potted and inspected products to cure at room temperature or with heat assistance (recommended 60°C if needed), according to product and process requirements.
Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.
Packing
Hardener: Typically 5KG/ 10KG / 20KG/ 200KG metal or plastic drums.
Resin: Typically 5KG/ 10KG / 20KG / 200KG metal or plastic drums.
FAQ
Q1: Can this potting compound be used for outdoor electronic applications?
A2: Yes, the weather-resistant properties of this transparent polyurethane potting compound make it suitable for outdoor use, providing protection against UV rays, rain, and temperature fluctuations.
Q2: What are the main features of the Weather-Resistant Transparent Polyurethane Potting Compounds?
A1: This potting compound offers excellent weather resistance, high transparency, strong adhesion, and durability, making it ideal for protecting electronic components from moisture, dust, and environmental damage.
Q3: What types of electronics are compatible with this potting compound?
A5: It is compatible with a wide range of electronic components, including circuit boards, sensors, connectors, and LED assemblies, especially those requiring clear encapsulation and protection from harsh environmental conditions.
Q4: Is the compound easy to apply and cure?
A3: Yes, the potting compound has good flow characteristics for easy application and typically cures at room temperature, forming a tough and flexible protective layer.
Q5: Does the transparent nature of the compound affect its protective qualities?
A4: No, the transparency of the polyurethane potting compound does not compromise its protective features; it still provides excellent insulation and environmental protection while allowing visual inspection of the encapsulated components.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.