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

1. High-Fluidity Processing: Two-component PU with excellent flow for easy handling and complete encapsulation.
2. Eco-Certified: Fully meets RoHS and REACH requirements.
3. Accelerated Curing: Heat-assisted option to shorten turnaround.
4. 3-Year Outdoor Rating: Proven UV stability and weatherability for 3 years of outdoor exposure.
5. Flex & Crack Resistance: Superior elasticity and fracture toughness under thermal and mechanical strain.

Technical Parameters 

Product Applications

1. LED linear light : operating temperature range of-40 to 85°C with 3-year outdoor yellowing resistance;
2. 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.
3. 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.