SWEPCO Heavy Duty Patching Compound

A thick, black, solvent base asphalt waterproofing compound used for stopping leaks instantly, patching and repairing existing roof coverings, blisters, flashings and for patching and sealing around roof projections. Bonds to wet surfaces for emergency repairs. Use with Heavy Duty Patching Fabric for extra reinforcement in high stress areas. Designed for both maintenance and new roof applications.

  • Versatile, all-purpose patching mastic
  • Stays flexible longer
  • Resistant to cracking and splitting
  • Ideal for new or old flashing work and all types of spot repairs