Microwave radiation was induced to polymerize polyisoprene film inside the adsorbed surfactant on the silica surface, so called admicellar polymerization technique. The effect of microwave power on film formation was studied. The reaction time was also varied depending on the use of microwave power. The results showed the comparison of the polymer film formation prepared by microwave and conventional (thermal) system. The formed film was identified by several techniques consisting of FT-IR, UV-Visible spectrophotometer, and SEM. The quantitative analysis of film formation was also determined by gravimetric analysis (burning).