Protectite Plasfelt
Synthetic Roofing Underlayment

Epilay® Protectite Plasfelt™

Plasfelt Synthetic Roofing Underlayment

  • Specifically manufactured to replace #15 Felt and #30 Felt
  • 6.5 MIL thickness - a 10 square roll weighs only 21 lbs!
  • Works best for use under Asphalt Shingles & metal roofs
  • 5x lighter, 25x stronger than #15 Felt
  • 20 year limited warranty
Epilay® Plasfelt™ Roofing Underlayment


Roofing Underlayment

Epilay® Plasfelt™ Roofing Underlayment with its advanced engineering is highly recommended for mechanically attached, coated woven synthetic roofing underlayment for sloped roofs. Epilay® Plasfelt™ is specifically manufactured to replace the #15 felt and #30 felt.

Epilay® Plasfelt™ is 25 times stronger than 15# felt and 5x lighter than 15# felt. With a 6.5 mil thickness, a 10 square roll weighs only 21lbs! This super low weight combined with 48" width and 250 ft. run length means big savings in time and labor - over 30% faster to install than felt!

These unique design features, when coupled with Epilay® Plasfelt™ exceptional light weight and exceptional tear strength, allows the contractor to easily carry the roll up and down the ladder. Fewer laps, cuts, and roll handling means you can do more jobs in less time resulting in huge savings for you, the roofing contractor.

Epilay® Plasfelt™ Roofing Underlayment
  • Grip Walk

    Epilay® GripWalk® high-traction unique gray top layer provides for a cooler working surface and can be used under primary roofing materials to replace 30# felt. GripWalk® high traction walking surface permits easier steep slope walkability, even during high condensation or moisture on the surface.

  • Skid Resist

    Epilay® Skid-Resist® is a very high anti-skid bottom surface made using superior technology and advanced polymers to help keep the underlayment intact and prevent the fabric from tearing while it is being fastened, avoiding any leakages through the underlayment layer.


Epilay® Plasfelt™ is a 100% synthetic composition providing the following benefits to the roofing contractor:

  • 1 year UV protection.
  • Water repellant, non-absorbent.
  • 6.5 mil thickness.
  • Works best for use under Asphalt Shingles & metal roofs.
  • Does not wrinkle, crack or become stiff in colder temperatures for smooth and easy installation.
  • Epilay® Plasfelt™ Ultra will not dry out or leach oil in high heat environments as organically saturated felts do.
  • 5 times lighter and 25 times stronger than #15 Felt.
  • 20 Year limited warranty.
  • Class A Fire ASTM E 108 - Meets & exceeds ASTM D4869 and D226 and ASTM D 8257.
  • Synthetic construction impervious to mold growth.
  • Plasfelt 4 ply Underlayment (3 ply cross woven coated polypropylene with a layer of non-woven polypropylene).
  • AC-188 approved
Epilay® Plasfelt™ Benefits

Technical Data

Test & Standard Typical Value
Nail Sealability Modified ASTM D1970 PASS
Water Permeability ASTM E96 No Dripping
Water Transmission ASTM D4869 PASS
Tear Strength ASTM D4533 MD 20 lbs/CD 17 lbs
Tensile Strength ASTM D751 MD 65 lbs/CD 52 lbs
Elongation ASTM D751 MD 19%/CD 18%
Weight per Square ASTM D5261 2.1 lbs/0.96 kgs
Specifications Data
Length per roll 250'/76.2m
Width per roll 48"/122cm
Weight per roll 21 lbs/9.6 kgs
Roll size 10sq/93m2
Rolls per pallet 64
Pallet weight 1450 lbs