Corrosion of metal pipes in offshore environments is a significant challenge, resulting in structural degradation and high maintenance costs. Fiber-reinforced polymer (FRP) materials are widely used to repair these structures, but their use is limited in applications that require resistance to temperatures above the glass transition temperature (Tg), due to the material's loss of stiffness. To overcome this limitation, this study proposes the development and evaluation of a fast-setting repair system based on textile-reinforced concrete (TRC). Polybenzoxazole (PBO) was selected as the reinforcing material due to its high mechanical strength and thermal stability, while refractory concrete was chosen for the matrix because of its resistance to high temperatures, as well as its design for accelerated curing, high viscosity, and high initial strength. The methodology includes the preparation and characterization of PBO-TRC samples, focusing on mechanical and thermal performance at temperatures of 25 ℃, 200 ℃, 300 ℃, and 400 ℃. The results indicate that the refractory concrete achieves a compressive strength of 66.0 MPa and the TRC a tensile strength of 21.4 MPa, both tested at ambient temperature after 48 h of curing. An increase in the compressive strength of the concrete was observed after exposure to 300 ºC, while the TRC showed a significant decrease in strength at 400 ºC. These results are mainly related to the reduction in the mechanical properties of the constituent materials.