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HydraShell Premium underlayment is among the safest, strongest, and best-performing underlayments on the market. Woven of heavyweight polymer fabric, HydraShell™ Premium offers superior strength and durability, dynamic steep-slope traction, water resistance, a wrinkle-free surface, and resistance to UV-breakdown. The textured Fiber Claw™ woven fabric surface offers dynamic traction and is ideal for steep slopes in a variety of weather conditions. HydraShell™ Premium is rated for commercial and residential applications using plastic caps and roofing nails (3/8” head), and is an ideal roof underlayment for asphalt shingles, metal, tile, slate, and a variety of other sloped roofing materials.
Features
  • Safer: Skid-resistant polymer coating and proprietary Fiber Claw™ walking surface offers dynamic steep slope traction
  • Stronger: HydraShell™ Premium is stronger than Type 15 or 30 felt and easier to handle during installation.
  • Lighter: HydraShell™ Premium is lighter than Type 15 or 30 felt and easier to handle during installation.
  • Simpler to apply: HydraShell™ Premium installs quickly, easily and with less risk. It’s lighter, stronger and covers more area.
  • Won’t buckle, warp, or crack: Superior lay-flat properties and water resistance keeps HydraShell™ Premium from warping, wrinkling, and cracking in cold weather.
  • Warranty: Lifetime limited warranty applies to HydraShell™ Premium.

Specifications

Warranty

  • Limited Lifetime

Tensile Strength (ASTM D882)

  • 126 lbs MD/92 lbs CD

Tear Resistance (ASTM D4533)

  • 41 lbs MD/37 lbs CD

Rupture Resistance (ASTM D3462-02)

  • 87 LBF

Beach Puncture (ICC AC-08)

  • Pass

Long-Term Sag (ICC AC-08)

  • Pass

Liquid Water Transmission (ASTM D4869-02)

  • Pass

Ultra Violet Aging (ICC-ES AC 188)

  • Pass

Accelerated Aging (ICC-ES AC 188)

  • Pass

Documentation

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