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604 – 25# Fiberglass Base Sheet

Product Description
Installation and
Technical Literature

Henry 604 – 25# Fiberglass Base Sheet is a heavy duty asphalt coated sheet with a heavyweight, non-woven fiberglass mat, suitable for use in fire retardant membrane assemblies, built-up roofing systems, ply sheets, and base sheets. It has a coating layer of asphalt on each side that reacts with Henry Cold Application Cement solvents to provide excellent adhesion without decreased tensile strength.


  • Has lay lines appropriate for normal roofing side laps
  • Prevents sticking in the roll with sand lightly sprinkled on sheet surface
  • Provides coated base and ply sheet for BUR
  • 3 square roll
  • ASTM D4601 Type II

May be applied with the following Henry cold application asphalt cement solutions:


Data Sheets

Henry 604 – 25# Fiberglass Base Sheet Data Sheet Download PDF      

SDS Sheets

Henry 604 – 25# Fiberglass Base Sheet SDS Sheet Download PDF