Coating & Potting

Vernissage et Résinage


LACROIX Electronics has mastered two tropicalisation techniques, varnishing and resin coating.


In our factories three types of varnish are used: acrylic, silicone and polyurethane.

Workshops and equipment are devoted to each type of varnishing to avoid any mix of materials. Each type of varnishing may be applied, as required, using one of the following methods:

  • Selective varnishing (Nordson Asymtek robot)
  • Spray gun
  • Dipping
  • Brush

Measuring apparatus enables the viscosity, thickness and adhesion of the varnish to be controlled.


Polyurethane or silicone resins are used to coat all or part of the circuit boards. Each resin is used in dedicated equipment which provides the correct ratio, mixture and quantity dispensed. This process is controlled by measuring the ratio between the resin and the hardener and the hardness of the sample.