High-Adhesion Ultra-Soft Silicone Potting Compound For LED Outdoor Lightings

BZ-3803 is a two-component room-temperature-curing condensation-type silicone potting compound specialized for outdoor LED lighting systems requiring strong adhesion to diverse substrates, featuring ultra-soft flexibility, exceptional bonding to aluminum, PC, and acrylic materials, and dual-color options (white/black). With wide temperature tolerance (-50~180℃) and RoHS compliance, it provides reliable protection against moisture, vibration, and thermal stress while eliminating the need for additional adhesives in lens-integrated LED fixtures. As a condensation-curing product with enhanced adhesion properties, its cross-linking reaction requires atmospheric moisture—critical operational note: allow 24 hours for full adhesion development before subjecting assemblies to mechanical stress or environmental exposure.

Key Product Features

1. Ultra-Soft Flexibility: Cures to an extremely low Shore A hardness of 4-12A, offering unparalleled shock absorption and vibration resistance for outdoor fixtures subject to wind, temperature cycling, and structural movement
2. Exceptional Substrate Adhesion: Formulated with specialized adhesion promoters to create strong, durable bonds with aluminum housings, PC lenses, and acrylic components—eliminating the need for separate adhesives and reducing assembly complexity
3. Dual-Color Options: Available in both white (aesthetic appeal for visible architectural components) and black (light-blocking for heat management in high-output fixtures)
4. Balanced Working Time: Offers a 50±15 minute pot life at 25℃, providing sufficient time for complex manual potting operations while supporting efficient automated production lines
5. Wide Temperature Stability: Maintains consistent mechanical and electrical properties across -50℃ to 180℃, ensuring reliable performance in extreme outdoor environments

Technical Parameters

Product Applications

1. Lens-Integrated LED Outdoor Lighting: Encapsulates drivers and bonds lenses in wall washers, floodlights, facade lighting, and decorative architectural fixtures where direct adhesion to PC/acrylic lenses is critical
2. Aluminum Housing LED Fixtures: Ideal for potting LED drivers in aluminum enclosures, where strong adhesion prevents moisture intrusion and enhances heat dissipation through direct substrate contact
3. Vibration-Prone Outdoor Installations: Suitable for LED lighting in heavy machinery, transportation vehicles, and outdoor structures subject to constant movement, where ultra-soft flexibility and strong bonding prevent component failure
4. Complex Assembly Projects: Optimized for LED fixtures with multi-component designs, where eliminating separate adhesives reduces assembly time and improves long-term reliability

Critical Curing & Handling Precautions for Adhesion Performance

BZ-3803 utilizes a condensation curing mechanism with enhanced adhesion promoters that requires extended time for full bond development:

1. Allow Full Adhesion Development: While surface curing occurs in 1-3 hours, full adhesion strength is achieved only after 24 hours at 25℃/50% RH. Do not subject assemblies to mechanical stress, vibration, or environmental exposure before this period to ensure optimal bond performance.
2. Substrate Preparation: For maximum adhesion, clean aluminum, PC, and acrylic surfaces with isopropyl alcohol before potting to remove dust, grease, and contaminants that could compromise bonding.
3. Humidity Control for Curing: Maintain workshop humidity between 40%-70% RH to ensure complete curing and adhesion development. In dry environments (<40% RH), extend curing time by 50% or introduce controlled moisture (e.g., humidifier).

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.