High Dielectric Strength Polyurethane Potting Compound ≥25kV/mm from China Suppliers and Factory for Transformers

Outdoor LED displays endure year-round sun and rain. Underwater lights operate while fully submerged. Automotive ballasts run in engine bay heat and vibration. Washing machine mainboards face frequent moisture exposure. These applications demand far more from potting materials than standard electronics. When adhesion weakens, waterproofing fails, or the potting layer cracks with age, the consequences range from malfunction to complete unit failure. Songxi Technology's two-component electronic potting compound series was developed specifically to address these challenges.

On the production line, the first obstacle is often insufficient flowability to completely fill the tiny gaps around PCBs, transformers, inductors, and IC chips—leaving trapped air bubbles that cause uneven heat dissipation and partial discharge. This series delivers low viscosity and excellent leveling, allowing thorough penetration into every corner of the component assembly to achieve complete, bubble-free, void-free potting. As a low density potting silicone, it reduces both potting costs and product weight, making it especially practical for power supply designs pursuing lightweighting goals.

For high-volume production, the working window of the potting material directly impacts line efficiency. This series offers ample working time after mixing and is compatible with automated potting lines, allowing seamless continuous potting and vacuum degassing in batch operations. After curing, it forms an elastomeric structure combining support with flexibility, protecting solder joints and pins from mechanical stress during transport and field use.

Long-term reliability of potted products depends on two critical factors: sealing and heat dissipation. This series offers excellent adhesion and outstanding outdoor waterproofing and moisture protection, with weatherability that holds up over years of outdoor service. As a lightweight flame retardant silicone, it carries UL94 V-0 certification, effectively containing risk propagation under fault conditions such as abnormal heating or short circuits. With adjustable thermal conductivity from 1.0 to 3.5W/m·K, it efficiently conducts heat from internal components to the housing, reducing temperature rise and slowing thermal aging. It has passed rigorous reliability testing including high-temperature aging and thermal shock, with no cracking, no debonding, and no performance degradation—meeting the demands of harsh environments including outdoor exposure, high humidity, and salt spray.

On safety and compliance, this series carries UL94 V-0 flame retardant certification, effectively containing risk propagation under fault conditions such as abnormal heating or short circuits, helping meet safety requirements for exported power supplies and high-end electronic equipment. It also complies with RoHS environmental directives, is non-toxic and non-corrosive. No primer is required, it cleans easily after dispensing, and as a reenterable potting compound, cured products can be disassembled for rework—details that significantly reduce total cost in high-volume production and after-sales maintenance.

From LED displays and underwater lights to automotive ballasts, surge protection modules, and washing machine mainboards, this series has been widely adopted across diverse waterproof electronic product applications. With mature formulations, stable batch-to-batch production capability, and comprehensive certifications, it is helping more manufacturers improve product quality, reduce rework rates, and strengthen market competitiveness.