Products obtained from APG casting, based on epoxy resin and mineral fillers with or without fiberglass reinforcement, giving a homogeneous insulation system with excellent electrical insulation properties and good mechanical resistance. Applied in components, such as insulators, insulating caps, terminal plates, bushings for transformers, generators, reactors, motors and circuit breakers. Epoxy insulators are made from the casting process by APG (Air Pressure Gelatinization) with the addition of mineral fillers that give the material excellent properties of electrical insulation and good mechanical properties.