Metal-Cored Polymer Root-Resistant Waterproofing Membrane

Product Overview

A multi-layer composite system engineered for waterproofing and aggressive root protection. Manufactured via co-extrusion:

• Core Layer: Metal foil (Al/Cu, 0.1-0.4mm) - Primary root barrier

• Waterproofing Layer: MAH-grafted PE resin (dual-sided) - Hydraulic seal + secondary root resistance

• Structural Interface: Non-woven geotextile - Cementitious adhesion layer

• Growth Media: Customizable top geocomposite (filtration/storage)

Key Features

1. Certified Root Resistance

   • FLL Class A certification (25-year efficacy)

   • Blocks Ficus and Bambusa species roots

2. Hydraulic Performance

   • Water vapor transmission: <0.01 g/m²·24h (EN 1931)

   • Hydrostatic resistance: 1.5 bar/168h (EN 1928)

3. Mechanical Strength

   • Puncture resistance: ≥800 N (EN 14418)

   • Peel strength: ≥5 N/mm (EN 12316-2)

4. Chemical Resilience

   • pH 2-12 stability (ISO 175)

   • Salt spray resistance: 2000h (ISO 9227)

5. Installation Integrity

   • Direct cementitious adhesion (bond ≥1.5 MPa, EN 1542)

   • Self-sealing damage containment

Layer Functions

Technical Specifications

Applications

• Intensive Green Roofs: >150cm soil depth

• Infrastructure Protection:
  Highway tunnels, railway cuttings

• Contaminated Sites:
  Brownfield redevelopment

• Critical Zones:
  Nuclear containment landscapes
  Heritage structure preservation