Seals are functional parts used for preventing the leakage of various liquids and gases. Given the stringent needs of its customers, as well as responding to strong customer demand, Fukoku has developed a wide range of seal products that offer both high functionality and superior performance. Our brake booster diaphragms are expertly designed with flexible materials and shapes to suit individual usage conditions and purposes. Our caliper piston seals are made using a streamlined production process from materials developed to resist heat and deformation fatigue. Both types of products provide excellent quality and continue to gain a wider share of the market.