The process of concrete development requires extensive water use, leading to a scarcity of natural freshwater supplies. It was found that nearly 19% of the overall water is consumed by industrial fields in which the construction field takes the lead. Employing seawater for concrete construction activities could help in protecting vital freshwater supplies when concrete is reinforced by materials such as aluminum, stainless steel, polymer composites or bio-based materials which are less sensitive to seawater. In the present research, seawater is used in place of tap water for mixing and curing of mortar. Different tests such as heat of hydration, compressive strength, flexural strength, electrical resistance and test for water absorption and permeable voids were conducted to evaluate the effectiveness of mortar made with seawater and tap water. The findings of this study show that seawater is a viable option to produce mortar without compromising the properties of mortar. Unreinforced concrete, fiber-reinforced polymer and aluminum-reinforced concrete all offer promising applications when combined with seawater, enhancing their construction potential and sustainability.