NovaSeal PRIMESynthetic Roof Underlayment

NovaSeal® PRIME is made from a completely waterproof construction of woven polypropylene and a slip resistant nonwoven top surface. PRIME forms a barrier in your roofing system that helps protect residential steep slope roofs in the most extreme weather conditions. PRIME synthetic roof underlayment delivers exceptional long-term weather barrier performance compared to traditional asphalt felt products.


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Key Features

  • Lightweight – shipping, staging, installing; significantly lighter than comparable asphalt felt products
  • Requires fewer fasteners and fewer repairs than typical asphalt felt products
  • Nonwoven walking surface provides superior slip resistant properties
  • No special tools required
  • Horizontal marker for overlap
  • Lighter weight and easier to handle (10-square roll is only 23 lbs)
  • Greater roof coverage per roll than traditional roofing felt
  • Extended UV protection – can be left exposed for up to 90 days
  • Exceptional tear and puncture resistance


  • PRIME is designed for use under asphalt and synthetic shingles, metal in residential applications and primed cedar shakes.