For over the past 130 years, Denso North America is a global leader of corrosion protection products. Denso manufactures a full line of petrolatum wax tapes, molding compounds and protective outerwraps for the water / wastewater industry. Protect your water and waster water facilities valves, fittings and pipes with the Denso products professionals use and trust. Denso also provides a full line of liquid coatings and linings.