• Remove all loose rust, scale and flaking coating by wire brushing,
  scrapping or blast cleaning. Surface must be clean and dry.
• Use your hands, brush, gloves, rag or roller to apply a thin layer of
  primer to the entire surface. The typical coverage are a is 3-5 m²/liter
• Use any amount of primer to fill in uneven areas such as threads,
  potholes, and depressions
• In order to protect the entire surface and structure, such as valves,
  flanges, sleeve expansion joints, etc., use petrolatum mastic to fill the.
  fill to achieve a neat outline and avoid gaps that need to be bridged
  when wrapping the petrolatum tape.
• Place the outer surface of the tape roll on the pipe. Wrap spirally around
  the pipe, for better protection overlap of each layer by at least 55%.
  smooth the compound with a gloved hand.