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P E R F O R M A N C E   S I L I C O N E S   |   W O M A N   O W N E D

Perfect for emergency repairs to leaky metal roofs, NovaFlex Metal Roof Repair & Patch Mastic can be quickly applied with a trowel or brush, fully curing into a translucent, rubber-like solid in as little as 48 hours.

NovaFlex Metal Roof Repair and Patch Mastic cures quickly and provides immediate waterproofing for short-term, long-term, and emergency repairs.

  • Rain safe in 1 hour (70 °F/50% RH)
  • 100% silicone rubber (solvent free, no odor)
  • No hardening, chalking, crazing, or cracking
  • Excellent repair material for many substrates
  • Translucent formula makes repairs less noticeable
  • Made in USA
  • Proposition 65
  • Sulphur Free
  • UV Resistant
  • VOC Compliant
How to Buy
  • Colors
    This product is available in the following colors:
      Translucent MRR150
  • Applications

    Recommended for repairing:

    • Metal siding/metal roofs
    • Gutters
    • Chimney and roof flashing
    • Snow guards
    • Pipe boots
    • Downspouts/trim
    • Lap joints
    • Copper (exposed areas)
    • Stucco
    • Roof tile
    • Termination bars
    • PVC/PVDF
    • Single-Ply
    • Aluminum
  • Details

    NovaFlex Translucent Metal Roof Repair and Patch Mastic is an exceptionally versatile, tough yet flexible mastic and roof sealer designed for repairs to metal panels, metal roof systems, gutters, and other metal buildings and structures. This repair material is easily brushed into place for precise application. If high-build application is required, this product can be applied with a trowel.

    • Excellent adhesion and hang
    • Application temperature: -20°F to +160°F (-29°C to +71°C)
    • Service temperature: -40°F to +400°F (-40°C to +204°C)


    Skin Time:
    5-10 minutes (77°F/50% relative humidity)

    Cure Through Time:
    48 Hours (77°F/50% relative humidity)

  • Packaging and Lead Times
    This product is available in the following formats:
    • 1 gallon pail

    Lead times are:
    • Please contact our Customer Operations team at 216-881-8111 or via this online form for up-to-date lead times
  • Specifications
    • Product Specifications
      Appearance Viscosity Extrusion Rate
      1/8” Orifice @ 50 psi
      Skin Over Time
      3/8” @ 50% RH & 77°F
      Through Cure
      3/8” @ 50% RH & 77°F
      Mastic Paste (Translucent) 3,500 – 7,000 poises (Brookfield #7 @ 10 rpm) -- 5 – 10 minutes 48 hours
    • Typical Properties
      Slump (Flow) Specific Gravity Tensile Strength
      ASTM D412
      ASTM D412
      Tear Resistance
      ASTM D624
      Shore Hardness
      ASTM D2240
      Service Temperature Application Temperature Adhesion
      ASTM D903
      Peel Strength
      STM C974
      Green Strength
      ASTM C1135
      Joint Sealant Designation
      ASTM C920
      No Slump 1.00 – 1.05 140 – 200 psi 500 – 650% 30 – 35 pli 20 +/- 5 -40°F to 400°F (-40°C to 204°C) -20°F to 160°F(-29°C to 71°C) Glass: 12 – 15 pli Aluminum: 10 – 14 pli Vinyl: 12 – 15 pli -- -- Type S, Grade NS, Class 35, Use NT, M, G, A, and O
    • Industry Specifications
      ASTM C-920, TT-S-001543A, and TT-S-230C
  • Downloads
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