Composite materials have become commonplace in the civil engineering community over the past decade. Typically, organic polymers are used as the matrix for binding the high strength fibers and the composite to other structural materials such as concrete, brick, and wood. High temperature resistance is one concern in using organic matrices, especially for structures that could possibly be exposed to fire. The results reported in this paper deal with the use of an inorganic polymer matrix for both making composite plates and strength/stiffness enhancement of structural materials. The room-temperature curing matrix, called Geopolymer, can resist temperatures up to 1000°C. Several applications of this polymer, including its use in strengthening reinforced concrete and wood beams, as well as its performance after high-temperature exposure are summarized in this paper.