Armour

High-Strength Protection for Demanding Roofing Applications.

Armour is engineered for demanding roofing applications, combining high tear and puncture resistance, excellent dimensional stability, and a slip-resistant surface for improved footing on steep, wet, or dusty slopes. Designed for mechanical fastening, Armour provides a reliable secondary barrier against moisture intrusion while maintaining dependable performance across a wide range of temperatures.

Built for challenging jobsite conditions, Armour remains flexible for installation in temperatures as low as −40°F and is designed for dependable performance at temperatures up to 240°F. Its extended 180-day UV exposure protection also provides added flexibility when roofing projects are delayed or the underlayment remains exposed during construction.

Key Advantages:

  • High-Strength Reinforcement – Reinforced high-tenacity backing provides superior tear and puncture resistance for demanding jobsite conditions.
  • Slip-Resistant Surface – Provides improved traction and footing during installation on steep-slope roofs, including wet or dusty surfaces.
  • Extreme-Temperature Flexibility – Remains flexible for easy installation in temperatures down to −40°F.
  • High-Temperature Performance – Designed for dependable performance at temperatures up to 240°F.
  • 180-Day UV Exposure Protection – Provides extended protection when the underlayment must remain exposed during construction.
  • Excellent Dimensional Stability – Helps maintain a flat, consistent surface during installation and exposure.
  • Broad Roofing Compatibility – Designed for use beneath asphalt shingles, metal roofing, tile, and other steep-slope roofing materials.

Built Tough.
Armour’s reinforced high-tenacity backing provides excellent tear and puncture resistance to withstand demanding jobsite conditions.

Confidence Underfoot.
The slip-resistant surface provides improved traction and footing during installation, especially on steep, wet, or dusty roofs.

Built for Long-Term Protection.
Armour provides a reliable secondary barrier against moisture intrusion beneath asphalt shingles, metal roofing, tile, and other steep-slope roofing materials.

Ready for Extreme Temperatures.
Engineered to remain flexible for installation down to −40°F and provide dependable performance at temperatures up to 240°F.

More Time to Finish the Job.
With up to 180 days of UV exposure protection, Armour provides greater flexibility when construction schedules change or roofing installation is delayed.

PropertyValueUnit
Nominal Thickness27mils
Water Vapour Transmission0.06Perms
Water Tightness (2000mm, 2h) Pass
Maximum Tensile Force (MD)120lbf/in
Maximum Tensile Force (CD)80lbf/in
Resistance to Tearing MD30lbf
Resistance to Tearing CD27lbf
Tensile Strength after Ageing (MD)109lbf/in
Tensile Strength after Ageing (CD)74lbf/in
Resistance to Water Penetration after Ageing≥80%
UV Resistance180Days
Temperature Range-40 to 240°F

Available Dimension:

Width:
  • 4 ft (1.22 m)

  • 4.9 ft (1.5 m)
Length:
  • 250 ft (76.2 m)

  • 328 ft (100 m)
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