Washington DC, Perma-Liner offers the # 1 selling small diameter pipe lining system: Perma-Lateral Lining System. This liner is non-woven, needle punched felt with a stitched and taped seam for security and quality. The liner itself is made and manufactured at Perma-Liner Headquarters. Don’t be typical, Washington D.C., our competitors use liners that stretch and fail, not the Perma-Lateral Scrim Liner. To learn more Washington D.C. call Perma-Liner today at 866-336-2568 or visit our website at www.perma-liner.com.