Abstract <p>Modern processes require innovative technological solutions meeting the requirements set forth to the environmental safety, lean production combined with efficiency. The results of studying the polymer composite materials in the form of fiberglass rebar cured inside a microwave unit are reported. The electromagnetic field oscillating at a frequency of 2450 MHz is capable of curing polymer composite materials. The thermosetting epoxy resins and glass fibers are used as binders and fillers. A uniform temperature profile is made inside the polymer composite material having a rod shape (with a diameter of 20 and 40 mm) using the microwave electrodynamic installation. It is confirmed that the microwave radiation energy as a heat source allows mastering a new level of producing polymer composite materials. The new materials feature better physics and mechanical properties. In addition, the use of microwave installations dramatically reduces the consumption of energy compared to regular techniques in making fiberglass rebar. The design parameters of microwave installations are presented, and estimates are given for fiberglass rebar heat treatment regimes. The temperature distribution profiles across the rods’ cross-section are obtained. The results can be applied in making polymer composite rods exposed to heat treatment.</p>