Fast-Curing Silicone Potting Compound For Outdoor LED Lightings
BZ-3802-K is a two-component room-temperature-curing
condensation-type silicone potting compound optimized for outdoor LED architectural lighting systems, featuring accelerated curing speed, deep-section curing
capability, and dual-color options (white/black). With wide
temperature tolerance (-50~180℃) and RoHS compliance, it provides
exceptional protection against moisture, UV radiation, and thermal
stress for LED wall washers, floodlights, and facade lighting
fixtures. As a condensation-curing product, its cross-linking
reaction requires atmospheric moisture—critical operational note: while curing is accelerated, potted
assemblies must still remain in a well-ventilated environment for
at least 12 hours before structural sealing to ensure complete deep
curing.
Key Product Features
- Rapid Curing Cycle: Achieves surface drying in 1-3 hours and full curing in 2.5-5
hours at 25℃, with optimized deep-section curing that eliminates
the need for layered pouring even in thicknesses up to 5cm (under
controlled humidity)
- Ultra-Soft Flexibility: Cures to a Shore A hardness of 15-30A, offering superior shock
absorption and vibration resistance for outdoor fixtures subject to
wind, temperature cycling, and structural movement
- Dual-Color Options: Available in both white (aesthetic appeal for visible
architectural components) and black (light-blocking for heat
management in high-output fixtures)
- UV & Weather Resistance: Formulated with enhanced UV stabilizers to prevent yellowing and
maintain performance in prolonged outdoor exposure, critical for
architectural lighting longevity
- 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
Technical Parameters
Parameters | Part A BZ-3802-K | Part B BZ-3802-K |
Before curing | Appearance | White/Black liquid | Clear liquid |
Viscosity(mPa·s.25℃) | 1500-3000 | 45-55 |
Initial mixed viscosity(mPa·s.25℃) | 800-1300 |
Density(g/cm³.25℃) | 1.22±0.05 | 0.95±0.05 |
Mixing & Curing | Mix ratio(by weight) | A:B=10:1 |
Pot life 130±30g(min.25℃) | 50±15 |
Curing condition | Room temperature curing |
Surface drying time 30g(H.25℃) | 1H-3H |
Curing time 30g(H.25℃) | 2.5H-5H |
After curing | Color | White/ Black |
Hardness (Shore A) | 15A-30A |
Temperature resistance(℃) | -50~180℃ |
Water absorption(24H) | ≤0.5% |
Surface resistivity(Ω/sq) | ≥1.0×1014 |
Volume resistivity(Ω.cm) | ≥1.0×1013 |
Elongation at break(%) | ≥60% |
Dielectric constant(at 50Hz) | ≤5 |
Breakdown voltage(kV/mm) | ≥15 |
Product Applications
- Outdoor LED Architectural Lighting: Encapsulates drivers and control modules in wall washers,
floodlights, facade lighting, and decorative architectural fixtures
where rapid turnaround and weather resistance are critical
- Large-Scale LED Installation Projects: Ideal for high-volume outdoor lighting projects requiring fast
curing cycles to meet tight construction deadlines
- Deep-Section Potting Needs: Suitable for LED fixtures with thick encapsulation requirements
(up to 5cm) where layered pouring is impractical or time-consuming
- UV-Exposed Environments: Optimized for outdoor installations in sunny climates, where UV
resistance prevents yellowing and maintains aesthetic appearance
over time
Critical Curing & Handling Precautions for Outdoor Applications
BZ-3802-K utilizes an accelerated condensation curing mechanism that depends on ambient moisture for complete cross-linking:
- Ensure Ventilation During Curing: While curing is faster than standard formulations, potted
assemblies must remain in a well-ventilated environment with
40%-70% relative humidity for at least 12 hours before structural
sealing. This ensures complete deep curing and prevents moisture
entrapment that could lead to long-term reliability issues.
- Deep-Section Curing Capability: Unlike standard condensation-curing silicones, BZ-3802-K can be
poured in single layers up to 5cm thick under optimal humidity
conditions (60%-70% RH). For thicknesses exceeding 5cm, layered
pouring with 1-2 hour intervals is recommended to maintain curing
efficiency.
- Humidity Control for Consistent Results: In dry outdoor environments (<40% RH), extend curing time by
30% or introduce controlled moisture (e.g., humidifier) to ensure
complete reaction. This is especially important for deep-section
potting where moisture penetration is critical.
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/25KG/200KG metal or plastic drums.
- Resin: Typically 25KG/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.
