Tremco TREMproof FBM Plus 1.2m X 20m Roll HDPE Pre-Applied Waterproofing Membrane

TREMproof FBM Plus

HDPE Pre-Applied Waterproofing Membrane

TREMproof FBM Plus is a high-performance, pre-applied waterproofing membrane composed of a robust high-density polyethylene (HDPE) film, a high-tack pressure-sensitive adhesive and a weather-resistant protective coating. The membrane is designed to form a continuous and integral bond with freshly placed concrete, creating a durable barrier that resists water ingress. It also provides protection against moisture and ground gases, including methane and radon, while preventing lateral migration.

TREMproof FBM Plus is release-liner free for efficient installation and incorporates dual adhesive seam technology (ZipLap™) that bonds adhesive-to-adhesive at overlaps. This delivers watertight joints and dependable performance in demanding site conditions without the need for specialised tools, heat or power. Environmental performance is supported by a third-party verified EPD in accordance with EN 15804.

Usage / Purpose

Designed for below-grade waterproofing in demanding civil, industrial and infrastructure projects, including:

• Structural slabs and retaining walls of basements
• Underground structures such as utility tunnels, transportation tunnels and mined or open-cut subway constructions
• High-specification infrastructure areas and mission-critical facilities such as data centres
• Underground spaces, integrated pipe galleries and other below-grade structures

Features & Benefits

• Forms an integral bond with concrete, verified through adhesion testing to concrete substrates
• Prevents lateral water migration — no lateral movement observed under hydrostatic pressure testing
• High tensile strength, elongation and puncture resistance confirmed through independent testing
• Manufactured without harmful chemicals; environmentally friendly, energy-efficient and compliant with green building requirements
• Fast, simple installation by loose-lay method with cold-applied self-adhesive overlap seams — no primer, heat or special tools
• Dual adhesive seam system providing a continuous watertight bond; overlap system demonstrated resistance to hydrostatic pressure
• Suitable for wet substrates and low temperatures (subject to installation limits; do not install below 5°C)
• Resistant to hydrostatic pressure — no leakage under high-pressure testing up to 7 bar
• Watertight under sustained pressure exposure conditions
• Resistance to ground gases including methane and radon
• Resistant to chemical exposure including salts and sulphates typically found in soils

Packaging & Coverage

• Roll size: 1.2m × 20m — roll weight 42kg
• Effective coverage: ≈24m² per roll (80mm side lap, 80mm end lap; allow 5–10% extra for detailing)
• Colour: White — concrete can be cast directly against the protective white coating
• Shelf life: 12 months in original, unopened packaging

Typical Physical Properties

Warranty

Tremco CPG Australia warrants TREMproof FBM Plus against material defects for 20 years from the date of installation (warranty must be applied for at completion of the job; workmanship covered separately by the applicator).