Finish for roof flashing. Resistoflash is a single component asphalt and polyurethane coating. Kit includes resist flash coating, reinforcement, brush and gloves. (Granules sold separately) It is ready to use and does not require primer for most surfaces, including asphalt shingles, granular elastomeric membranes, wood, concrete, metal, etc. Use it for a complete waterproofing on parapets or up stands in new construction or renovation work.