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505 – FlashMaster™

Product Description
Technical Literature

Henry 505 FlashMaster™ is a premium quality, trowel-grade flashing cement for use on dry surfaces in all temperature conditions. Henry 505 FlashMaster™ is made from heavy-bodied asphalt reinforced with organic fibers, and is modified and rubberized for long life and flexibility.


  • Can be used in hot or cold temperature conditions
  • Spreads easily in cold weather
  • Repairs holes, cracks, splits on asphalt coated, composition and metal roofs
  • Seals around chimneys, vents, skylights, flashings as well as tabs of asphalt shingles
  • Exceeds the requirements of ASTM D-4586, Type I and Federal Specification SS-C-153C Type I, Class A

Sizes available

  • 3.5 gallon, 5 gallon

Data Sheets

FlashMaster™ Data Sheet Download PDF      

SDS Sheets

FlashMaster™ SDS Sheet Download PDF