Black Silicone Potting Compound For LED Outdoor Lighting

BZ-3701 is a two-component room-temperature-curing condensation-type silicone potting compound exclusively optimized for LED outdoor fixtures and medium-low power LED lighting systems. Featuring a black opaque formulation, wide temperature tolerance (-50~180℃), and compliance with RoHS and halogen-free standards, it provides reliable protection against moisture, dust, and thermal shock for LED drivers, power modules, and control circuits. As a condensation-curing product, its cross-linking reaction requires air moisture participation—critical note: potted fixtures must not be hermetically sealed immediately after pouring, as this will cause incomplete curing.

Key Product Features

1. Black Opaque Protection: Cures to a deep black finish that effectively blocks light interference, hides internal components, and enhances UV aging resistance, making it ideal for outdoor LED wall washers, underground lights, and floodlights
2. Cost-Effective Solution: Delivers reliable performance at a competitive price point, optimized for high-volume production of medium-low power LED lighting products
3. Moisture-Driven Curing: Room-temperature curing via reaction with atmospheric moisture enables simple operation, but requires proper ventilation during the initial curing phase
4. Wide Temperature Stability: Maintains consistent mechanical and electrical properties across -50℃ to 180℃, withstanding extreme temperature fluctuations in outdoor environments
5. Eco-Friendly Formulation: Fully compliant with RoHS and halogen-free regulations, supporting sustainable manufacturing practices

Technical Parameters

Product Applications

1. LED Outdoor Lighting: Encapsulates drivers and control modules in wall washers, underground lights, floodlights, and streetlights
2. Medium-Low Power LED Fixtures: Ideal for potting ballast circuits in panel lights, tube lights, and decorative LED lamps
3. Supporting LED Components: Suitable for low-power power adapters and sensor circuits associated with LED lighting systems (minimal focus on general electronics)

Critical Curing Precautions

BZ-3701 utilizes a condensation curing mechanism that depends on ambient moisture for complete cross-linking:

1. Avoid Early Hermetic Sealing: Potted assemblies must remain in a well-ventilated environment for at least 24 hours before structural sealing. Premature sealing will trap moisture and prevent full curing, leading to soft spots, poor adhesion, and reduced performance.
2. Humidity Requirements: Optimal curing occurs at 40%-70% relative humidity. In dry environments, extend curing time or introduce controlled moisture to ensure complete reaction.
3. Thick Section Potting: For applications requiring potting thickness >3cm, use layered pouring with 2-3 hour intervals between layers to allow moisture penetration and prevent internal curing defects.

Directions for Use

1. Pre-potting Preparation: Calibrate scales, prepare potting tools, cleaning tools, check machine settings, check vacuum pump force, etc.
2. Product Pre-treatment: Place product on a level surface or fixture. Remove dust, clean, degrease, and dry if necessary.
3. 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.
4. Mixing & Stirring: Manual operation requires thorough stirring or using electric stirrers to ensure homogeneous mixing. Machine potting requires sufficient stirring speed, adjust as needed.
5. Uniform Potting: Manual operation should be done in small, multiple batches to ensure uniformity. Machine potting should follow the programmed path for quantitative dispensing.
6. Inspection or Secondary Potting: After potting, visually inspect as needed. Perform touch-up, bubble removal, or secondary potting if required.
7. 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.
8. Final Product Confirmation: Perform visual inspection and performance testing as required by the customer.

Packing & Shipping & Storage

1. Hardener: Typically 5KG/10KG/25KG/200KG metal or plastic drums.
2. Resin: Typically 25KG/200KG metal or plastic drums.
3. Store and transport as a general chemical product.
4. 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.
5. 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.