For over 140 years, Denso is a worldwide leader of corrosion prevention products. We offers a variety of products that help protect metal pipes, valves and fittings from corrosion as well as sealing of electrical conduits, maintenance holes, catch-basins and more. Denso manufactures a full line of petrolatum tapes, mastics, outerwraps, epoxies, tank linings, and more for the water & wastewater industry. Protect your water and wastewater project with Denso products that meet the AWWA Standards.