PCB and electronic components potting compounds

Polyurethane potting compounds are bicomponent systems used to encapsulate electronic components — printed circuit boards (PCBs), sensors, transformers, LED drivers, controllers, power supplies. The process consists of preparing the component in a housing and pouring the liquid PU system, which cures filling all spaces and forming a solid block that electrically and mechanically protects the internal components.

Potting functions are multiple: protection against moisture, vibration, mechanical shock, chemical contamination, electrostatic discharge. It also works as a heat dissipator (with specific thermally conductive formulations), electrical insulator, and can include flame retardant properties according to application.

It competes with other encapsulation technologies: silicone (more flexible and temperature-resistant, more expensive), epoxy (more rigid and cheaper, but thermally more fragile), acrylic. PU offers a unique combination — flexibility, mechanical strength, moderate cost — that makes it dominant in applications such as outdoor LED drivers, automotive electronics, industrial sensors.