National Coatings Blog

Fix your roof leaks NOW - Pro-Grade 923 Silicone Roof Sealer Cures Underwater

Posted by Nicole Gale on Thu, Feb 23, 2023 @ 08:28 PM

PermaPatch Rain ImageFix Your Roof Leaks Now, No Need to Wait with Pro-Grade 923

Our original PermaPatch & Repair now called Pro-Grade® 923 Butter Grade Silicone Roof Sealer cures underwater. The Pro-Grade 923 is a trowel grade, 100% silicone rubber that is ideal for sealing penetrations. It is excellent for use over cracks, seams, penetrations, holes, fish mouths, laps, curbs, drains and joints.


  • Permanent
  • Low VOC
  • Watertight
  • Crack Resistant
  • High Solids
  • UV Resistant
  • Ease of Application
  • Superior Adhesion
  • Use on Damp & Wet Surfaces

Contact Us