High-Adhesion Ultra-Soft Silicone Potting Compound For LED Outdoor LightingsBZ-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- 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
- 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
- Dual-Color Options: Available in both white (aesthetic appeal for visible
architectural components) and black (light-blocking for heat
management in high-output fixtures)
- 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
- Wide Temperature Stability: Maintains consistent mechanical and electrical properties across
-50℃ to 180℃, ensuring reliable performance in extreme outdoor
environments
Technical Parameters
Parameters | Part A BZ-3803 | Part B BZ-3803 | Before curing | Appearance | White/Black liquid | Clear liquid | Viscosity(mPa·s.25℃) | 1500-3000 | 45-55 | Initial mixed viscosity(mPa·s.25℃) | 800-1200 | Density(g/cm³.25℃) | 1.17±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℃) | 3H-6.5H | After curing | Color | White/ Black | Hardness (Shore A) | 4A-12A | 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
- 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
- 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
- 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
- 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 PerformanceBZ-3803 utilizes a condensation curing mechanism with enhanced adhesion promoters that requires extended time for full bond development: - 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.
- 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.
- 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
- 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.
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