1″ x 12′, black, rescue tape, .30 thick, self-fusing, premium quality silicone, used by the us army as part of the battle damage assessment & repair kits bdar, carried on military vehicles & tanks, for emergency product for plumbing, automotive, electrical & industrial repairs, creates a permanent airtight, watertight seal in seconds, repair & seal leaky hoses, pipes, tubing, lines, & fittings, works even over oily or dirty surfaces, resists 500 degrees & remains flexible to – 85 degrees, insulates 8,000v, 950 psi tensile strength, resists fuels, oils, acids solvent, salt water, road salt & uv rays, meets & significantly exceeds military specifications mil-spec.