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.
| Property | Value | Unit |
|---|---|---|
| Nominal Thickness | 27 | mils |
| Water Vapour Transmission | 0.06 | Perms |
| Water Tightness (2000mm, 2h) | Pass | |
| Maximum Tensile Force (MD) | 120 | lbf/in |
| Maximum Tensile Force (CD) | 80 | lbf/in |
| Resistance to Tearing MD | 30 | lbf |
| Resistance to Tearing CD | 27 | lbf |
| Tensile Strength after Ageing (MD) | 109 | lbf/in |
| Tensile Strength after Ageing (CD) | 74 | lbf/in |
| Resistance to Water Penetration after Ageing | ≥80% | |
| UV Resistance | 180 | Days |
| 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)
