Faithfull Petro Tape is made from synthetic fabric that is impregnated with petrolatum compound and anti-corrosion agents. It will protect against corrosion caused by acids, alkalis and salts. It can be used on metal pipework above or below ground, as well as valves, flanges, hydraulic pipes, marine structures and any other metal parts where exposure is likely. It is non-polluting and weatherproof, and will not harden, peel or crack.