RMA XTRM-PLY is a flexible durable PVC membrane designed to meet the unique challenges of a RV roof. Unlike other RV roofs, RMA XTRM is a solid material that will not chalk and stain the side of your RV. It does not require periodic expensive re-coating. It is naturally fire retardant and UV resistant. Once installed-easy to patch/repair wit PVC cement. Designed to be installed with: RMA adhesive, sealants and butyl tape only. 9'6" x 21' roll.