Polymer foams, specially polyurethane foams, are widely used in industries. One of the most disadvantages of polyurethane is its flammability that restricts the use of this polymer. Apart from this, it is also noteworthy that such foams do not ensure the ability to be ductile and flexible while in many of the important applications of this type of materials, their ductility and flexibility play a key role in the case of the materials and equipment potentially exposed to explosion and fire. Also, while many thermosetting resins can be a non-flammable agent, when the non-resilience of thermoset-derived composites and their non-ductility are concerned, these issues further limit the use of thermoset composites in the development and design of low-temperature composites. In the case of utilizing thermoplastic polymers, even with their viscosity better than thermosets, their extremely high flammability crosses out the application of these polymers in anti-fire issues. On the other hand, research on flammability and anti-fire properties of composites, compared to their same composite systems in respect of mechanical properties is so insignificant that the research frequency and statistics indicate the importance of addressing this issue in the nation of Iran as a warm country where construction and equipment developments meet only marginal standards. In this project, polyurethane was reinforced with additives such as zeolite and graphite nanoparticles (GNP) to examine the fire resistance behavior of the fabricated samples. Experiments were conducted to investigate the mechanical, thermal and structural properties of the composites. The combination of this polymer with a thermoset base resin consisting of isocyanate was studied as a hybrid composite system. The mechanical properties of polyurethane reach their greatest value by the addition of 10 wt% of zeolite and 10 wt% of GNP. The fire resistance of the fabricated specimens is dramatically improved when the thermoset resin of isocyanate base is used. Moreover, the results revealed that the addition of glass fiber reinforced fabric favorably affects the fire performance and mechanical properties of composites. Keywords: 1-polyurethane foam 2- fire resistance 3- the auxiliary resin to the isocyanate base 4-combined composite base