Research on the manufacture of foam rubber has been carried out by varying the sulfur concentrations of 40, 50 and 60% and hybrid fillers 1,2,3,4 and 5 g bentonite-silica. This study aims to determine the best results from the influence of variations in sulfur concentration and mass of bentonite-silica hybrid filler based on test results including hardness, elongation at break and tensile stres…