HydroFlash® GP Self-Adhered Window Flashing 4" ***CALL 800.523.5261 FOR AVAILABILITY***


HydroFlash® GP Self-Adhered Flashing is a specially formulated acrylic adhesive for maximum adhesion to Benjamin Obdyke’s Housewraps.

  • Color: WHITE
  • Protect window opening from moisture intrusion 
  • Specially formulated acrylic adhesive that outperforms regular butyl and rubberized asphalt
  • Polyethylene facer resists abrasions and tears during installation
  • AAMA 711 approved
  • No VOCs
  • Apply to dry surfaces and installed down to 25°F, store above 40°F
  • No primer needed

Product Specs:

  • Length: 82 ft.
  • Width: 4 in.
  • Thickness: 11.5 mils
  • UV Rating: 180 days
  • Warranty: 15 Year Product Warranty


5 out of 5 (based on 1 rating)
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Hydrogap 4” flashing tape

I received the order promptly. Initial impression is that the adhesive is very aggressive and readily makes a tight bond. I assume and hope this indicates continued adhesion as well.
Posted by Mike Moore, 18th Oct 2021