Home - Jaro Corp At Jaro Corp, we manufacture and apply our own dielectric coating: JARO 650 Series Polyimide. This coating is a proprietary polyimide thermo set material. LEARN MORE. … At Jaro Corp, we manufacture and apply our own dielectric coating: JARO 650 Series Polyimide. This coating is a proprietary polyimide thermo set material. LEARN MORE. …