Cement lining protects the I.D. of the line from rust and corrosion. Cement lining is used in water pipelines and helps keep potable water clean, pure, colorless and odorless and increases flow. Cement lining cement linings tighten and and heal in service and provides corrosion protection to pipes. Cement lining is cost effective. Cement lining is varied, the most purposeful is the AWWA sand and cement mix, but by using different cements, additives, pozzolans, etc. a lining for practically any service can be applied.