High-Quality UV-Resistant PU Potting Compound for Outdoor LED Lighting
Product Description
BZ-3328-6 is a transparent, weather-durable polyurethane encapsulant developed for LED point sources, linear fixtures, and outdoor luminaires. With an ultra-low viscosity of 300–500 mPa·s at 25°C, it ensures deep penetration and void-free coverage of sensitive electronics, delivering reliable waterproof sealing up to IP67/IP68. Curable at ambient temperature or with heat acceleration, the material forms a resilient elastomeric layer (Shore A ~65) that adheres firmly to metals and common plastics. Its anti-yellowing formulation guarantees 3 years of outdoor service life, preserving optical clarity while shielding LEDs and PCBs from moisture, dust, and mechanical stress.
Key Product Features
- Two-component PU system with high fluidity for easy processing and complete component encapsulation.
- Fully compliant with RoHS and REACH environmental standards.
- Heat-accelerated curing enables faster production cycles.
- Excellent UV stability and weatherability, rated for 3-year outdoor exposure.
- Superior flexibility and crack resistance, ensuring reliable protection under thermal and mechanical loads.
Technical Parameters
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Parameters
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Hardener
BZ-3328-6 A
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Resin
BZ-3328-6 B
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Before curing
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Appearance
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Clear liquid
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Clear liquid
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Viscosity(mPa·s.25℃)
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1200±500
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200±100
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Initial mixed viscosity(mPa·s.25℃)
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400±200
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Density(g/cm³.25℃)
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1.09±0.05
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0.98±0.05
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Mixing&Curing
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Mix ratio(by weight)
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A:B=1:1
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Pot life 130±30g(min.25℃)
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15-30min
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Curing condition
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Room temperature curing
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Surface drying time 30g(H.25℃)
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3±1
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Curing time 30g(H.25℃)
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5±1
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Curing time 30g(Heated)
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60℃ heated ≤1H
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After curing
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Hardness (Shore A)
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58±10
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Temperature resistance(℃)
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-40~85℃
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Water absorption(24H)
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≤1.0%
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Surface resistivity (Ω/sq)
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≥1.0×1012
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Volume resistivity (Ω.cm)
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≥1.0×1012
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Tensile strength(MPa)
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≤3
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Elongation at break(%)
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≥80%
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Dielectric constant(at 50Hz)
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≥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 & Shipping & Storage
Hardener: Typically 5KG/ 10KG / 20KG/ 200KG metal or plastic drums.
Resin: Typically 5KG/ 10KG / 20KG / 200KG metal or plastic drums.
Store and transport as a general chemical product.
Store sealed, protected from light at room temperature. Shelf life varies from 6 to 12 months depending on packaging; please refer to the expiry date on the shipping package.
When temperature drops to 15°C or lower, the hardener or resin should be stored in a warm place or heated before use for potting. Specific heating recommendations depend on the temperature drop; please communicate and consult with us.
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.
