Mercer Rubber Company, established in 1866, is the oldest U.S. manufacturer of rubber expansion joints, flexible duct connectors and industrial hose. With five engineers on our staff, two of whom have professional licenses, Mercer has successfully analyzed and designed a wide range of products for demanding applications. Our specialty is developing custom products for a specific job, from a single small joint to hundreds of large diameter joints needed for power generating projects.  Mercer has extensive experience in the Power, Waste Water treatment, Industrial and Chemical Industries, as well as HVAC Commercial and Marine work. These customers rely on Mercer products for high reliability and a long, virtually maintenance free life.