Weather Resistant Waterproof PU Compound Potting Materials For Electronics

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

1. Two-component PU system with high fluidity for easy processing and complete component encapsulation.
2. Fully compliant with RoHS and REACH environmental standards.
3. Heat-accelerated curing enables faster production cycles.
4. Excellent UV stability and weatherability, rated for 3-year outdoor exposure.
5. Superior flexibility and crack resistance, ensuring reliable protection under thermal and mechanical loads.

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 & 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.