To survive the unwelcome severe loading and hostile environmental conditions, the competition in the civil engineering markets typically enforces low-cost, low-density, and environmentally resistant materials with minimal maintenance and long service life qualities. Because of this, the use of sophisticated composite materials for new construction and renovation applications has improved to an acceptable level during the past few decades. Due to the characteristics of FRP, powerful strengthening techniques for various structural applications have become the main focus of many studies in recent years. To ensure price competitiveness with other industrial solutions, pultrusion was chosen as a manufacturing process. Pultrusion technology provides a high production efficiency with bars, whose main strength parameters are located along the axis of the profile. Evolution of the approach of composite bars to increase adhesion parameters to the concrete obtaining pseudoductility effects forced modifications to the standard production process. Several concepts of the modified pultrusion process with pros and cons will be discussed in this chapter, such as the benefits of the pull-winding manufacturing system. The FRPs approach has been effectively applied to improve underground infrastructures, silos, tanks, tunnels, buildings, and bridges. Due to their benefits, such as being lightweight, fatigue resistant, having high tensile strength, anticorrosion, and thermal insulation, FRPs have been studied as high-performance materials. This chapter will include a comprehensive description of the potential application of FRP rebars as well as its main advantages.