Seal-Tite Corner Seal is a heavy-duty material for sealing RV walls and ceilings. Applied before the molding, Corner Seal provides a durable, flexible virtually impermeable seal between the unfinished union of the walls and ceilings. The sealing side consists of a thick, pressure-sensitive elastomeric seal that sticks and conforms to any smooth or irregular surface, including S-locks. Corner Seal provides an instant and permanent seal underneath the caulk-and-molding system to provide a double barrier of leak protection. The fleece side provides more superior caulk-cure adhesion than the typical smooth surface of RV exteriors.Kit contains everything you need for 100 linear feet - 2 rolls of Corner Seal Tape and 6 Tubes of a clear Dicor Cap Sealant