Aim: The aim of the study was to compare the flexural strength of repair materials, silane-incorporated glass fiber, and metal fibers with conventional acrylic repair systems. Materials and methods: A total of 48 heat-cure denture base resin specimens were prepared and finished and divided into three groups of 16 acrylic specimens. In every group, the final repair samples were made by placing two acrylic specimens separated by a 4 mm space in a silicone mold to make a place for the repair. The final repair samples were eight per group. Group I (control) was repaired by filling the space with autopolymerizing resin and used as comparative specimens. For group II, 30 mm long metal wire (18 gauge) reinforcement air-abraded (with 50 µ alumina oxide particles) and treated with the adhesive primer was placed in the center of the groove. For group III, the glass fiber was immersed in a Monobond-S (Ivoclar) silane coupling agent for 10 minutes before being placed into the groove and air-dried. Twenty-four final samples were tested for flexural strength on an Instron testing apparatus. All data was analyzed using the analysis of variance (ANOVA) test followed by Bonferroni test. Results: The transverse strength of acrylic resin specimens, repaired with autopolymerizing acrylic resin alone, increased when reinforcement materials were used. When the two reinforcements used were compared it was found that the flexural strength of group II (stainless steel) was 95.868 MPa and was greater than the flexural strength of group III (glass fibers) which was 78.351 MPa. Conclusion: Reinforcements improve the repair strength. Glass fiber and stainless steel metal wire reinforcement material provide greater repair strength than autopolymerizing resin alone. Clinical significance: Use of repair resins can reduce the need to construct a new denture altogether thereby decreasing the chair side time and cost.