In this study, casting filter production parameters were investigated by coating SiC with superior mechanical and chemical properties on polyurethane sponge. Many methods in which SiC filters are produced have been researched and considering its simple applicability, the replication method has been chosen as the production method. In the experiments, polyurethane sponges with different porosities were coated with varying proportions of water, bentonite, gum arabic and SiC, and then subjected to pyrolysis and sintering. The characterization of the samples was carried out by weight loss, compression test, Archimedes scale and SEM methods. According to the test results, the highest weight loss was obtained with 46% by adding 30 mL of water into 30 ppi polyurethane sponge. In the sintering tests, the highest strength was obtained with the value of 472 kPa in the experiment performed at 1,450 ºC. The same sample gave the optimum result with a density of 3.101 g/cm³ and porosity of 1.24%. At the end of the study, the samples produced successfully were used in the real casting process and it was observed that they were effective in filtering

Keywords: Filter, SiC, Sintering, Refractories, Ceramic Foams