Growing demand for corrosion-free reinforcing material is the main reason for using the "Fiber Reinforced Polymer Rod" bar as an internal reinforcement of reinforced concrete components. Excellent rust resistance, environmentally friendly, non-magnetic, much strength to weight ratio, etc. proves the high potential of the FRP rebar as a reinforcing material. However, the durability and serviceability of this new material are still widely understood. Early studies show that Fiber Reinforcement Polymer has low resistance to water with alkaline pore concrete and low modulus elasticity, and a cracking environment leading to durability and performance problems. In our project, a explained testing program was designed with two main objectives to test the Flexural strength of the GFRP rebar at a different exposure. The test on hardened concrete was a flexible strength test in the prism (750 × 150 × 150 mm) for 28 days of curing according to IS: 516-1959. © 2024 Elsevier B.V., All rights reserved.