NovaFlash Butter Grade Mastic is trowel applied for high-build applications or applied with a stiff-bristled brush for low-build applications. Designed for applications that require a lower thickness and less density than NovaPatch Fiber Reinforced Mastic, NovaFlash Butter Grade Mastic cures quickly and provides immediate waterproofing for short-term, long-term, and emergency repairs.

  • 100% silicone rubber
  • Excellent repair material for many roofing substrates
  • Rain safe in 1 hour (70°F/50% RH)
  • Excellent adhesion and hang
  • Easily applied by trowel or stiff-bristled brush on vertical or horizontal surfaces
  • Solvent-free
  • VOC compliant
  • Resistant to ponding water
  • No hardening, chalking, crazing, or cracking
  • Wide temperature application range: 10°F to 120°F
  • Wide temperature performance range: -40°F to 300°F
  • Available in white and black
  • 5 year limited warranty

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