Waterproofing Bendable Transparent PU Potting Compound For LED Strip Connector BZ-519-3

Flexible Transparent PU Potting Compound for LED Strip Applications

BZ-519-3-L is a clear two-component polyurethane system developed specifically for LED flexible strips and lighting products. It exhibits strong adhesion to LED chips and flexible printed circuits (FPC), maintains outstanding flexibility for curved mounting configurations, delivers IP67-rated waterproof protection, and resists yellowing for up to 2–3 years of service life.

1. High bend resistance with elongation up to 200%.
2. Low-viscosity formulation enables easy dispensing, compatible with both manual and automated processes.
3. RoHS/REACH compliant for smooth export.
4. Excellent UV and weather resistance, maintaining optical clarity for 2–3 years.

Parameters		Hardener BZ-519-3-L A	Resin BZ-519-3-L B
Before curing	Appearance	Clear liquid	Light yellow clear liquid
	Viscosity(mPa·s.25℃)	4800±1400	800±300
	Initial mixed viscosity(mPa·s.25℃)	2250±750
	Density(g/cm³.25℃)	1.03±0.05	1.02±0.05
Mixing&Curing	Mix ratio(by weight)	A:B=1:1
	Pot life 130±30g(min.25℃)	36±10min
	Curing condition	Room temperature curing
	Surface drying time 30g(H.25℃)	7-10
	Curing time 30g(H.25℃)	12-24
After curing	Hardness (Shore A)	48±10
	Temperature resistance(℃)	-40~80℃
	Water absorption(24H)	≤1.0%
	Surface resistivity (Ω/sq)	≥1.0×1010
	Volume resistivity (Ω.cm)	≥1.0×1010
	Tensile strength(MPa)	≤3
	Elongation at break(%)	≥200%
	Dielectric constant(at 50Hz)	≤10
	Breakdown voltage(kV/mm)	≥10

1. LED Flexible Strip Light: With excellent transparency and heat resistance, the LED flexible light strip remains flexible even at low temperatures without hardening. These features enable it to withstand harsh installation and operating conditions.
2. Sensor: Transparency, flexible, resistant to high and low temperature shocks, suitable for various application scenarios.

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.

1. Hardener: Typically 5KG/ 10KG / 20KG/ 200KG metal or plastic drums.
2. Resin: Typically 5KG/ 10KG / 20KG / 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.