Shurtape PC-658 Super Bottom Board Tape is a 17 mil black tape used for seaming and sealing of bottom board materials used in the mobile/manufactured housing industry (pre-manufactured homes, RVs, etc.) during assembly, set-up, and maintenance. Bottom board tape, AKA under belly tape, is also used to repair bottom board holes either formed by rodents or fabricators (i.e. plumbers, electricians, etc.) during set-up and construction. Also for the protection of metal parts or surfaces in metal and/or plastic peening operations. Used in tough applications where a high tensile, adhesion, and thickness are desired. PC 658 comes with Shurtape's Polyblended CO-EX technology with is a co-extrusion process which melds polyethylene, cloth and adhesive in a single, high-temperature step which results in a permanent, airtight bond (creates added strength which will not delaminate). Tested in accordance with UL 723.