Polyanchor HU PLUS is a mechanically attached roof underlayment engineered with reinforced fabric exterior facers bonded to a high-performance modified bitumen core.
Featuring Tri-Strata™ Technology, its three-layer construction integrates highstrength fabric facers with over 80% of the product composition consisting of a premium modified bitumen core to deliver exceptional tear resistance, flexibility and long-term weather durability. It is built to maintain performance under increased jobsite traffic, wind uplift, and prolonged exposure during installation across more demanding deck conditions.
The premium modified bitumen core enhances sealability around fasteners, helping provide stronger protection against moisture intrusion at nail penetration points.
Suitable for a wide range of roof coverings, Polyanchor HU PLUS is the preferred choice when a tougher, more robust underlayment solution is needed due to rough or uneven surfaces commonly found in re‑roof applications.
Features
- High-performance modified bitumen core provides advanced nail sealability around fasteners and penetrations
- Over 80% of the product composition consists of elastomeric modified bitumen, which enhances durability, flexibility, and long-term performance.
- Tri-Strata™ reinforced construction delivers exceptional tear strength and puncture resistance
- Weather-resistant construction supports up to 180 days of UV exposure
- Durable construction helps withstand tile staging, foot traffic, and fastener or batten abrasion
- Enhanced flexibility helps the underlayment lay flatter and handle easier during installation
- Reinforced surface enhances walkability, traction, and jobsite durability