SPC Pipelock Tape is a non-woven bonded synthetic fabric, fully impregnated and coated with natural petroleum based compounds and inert fillers. It is chemically inert, does not polymerize or oxidize, and retains water resistance and dielectric properties over an indefinite period. Three different tapes are available depending on the service temperatures (130°F [54°C], 150°F [66°C], and 165°F [74°C] respectively). SPC Pipelock Tape is part of the SPC Pipelock system developed for the protection of metal surfaces in severe environments and difficult to protect applications. The system is designed to be applied over hand or power wire brushed surfaces for above ground, buried, and underwater applications. The typical system involves priming the surface with a paste (SPC Pipelock Paste), profiling around irregular shapes with a mastic compound (SPC Pipelock Mastic), and wrapping with a petroleum tape (SPC Pipelock Tape). An optional overwrap tape (SPC Pipelock Overwrap) is used for additional mechanical or electrical resistance.