What is PREFLEX 3000 used for?

PREFLEX 3000 is a pre-applied HDPE sheet membrane for below-slab and blindside waterproofing - laid before the concrete pour, bonds fully to the poured concrete via composite layers. Used for foundations, basements, and lift shafts where access for post-applied membrane is impossible.

How does pre-applied bonding work?

PREFLEX 3000 has a composite layer system that mechanically and chemically bonds to the freshly poured concrete - creating a permanent integral seal that prevents lateral water migration between membrane and structure. No primers or protection layers required.

Lay the membrane HDPE-side-down against the substrate (blindside) or formwork. Overlap edges using the self-adhesive selvedge for sealed laps. Pour the concrete directly onto the membrane - the bond develops as concrete cures.

20 m² per roll at 1.5mm thickness (with sand layer). Designed for 1m wide x 20m long format that handles full-area below-slab installations efficiently.

What environmental conditions does it handle?

PREFLEX 3000 flexes to -30°C without cracking, achieves over 500% elongation (tested 590-645%), and resists groundwater salts, hydrocarbons, and sulfates - the most aggressive below-grade chemistry.

Forspec Actflex 300 Solvent Free Two Part Reactive Coating Membrane for waterproofing, concrete protection, and crack-bridging applications, providing a durable seamless barrier for internal and external surfaces

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PREFLEX 3000 1m x 20m Pre-Applied HDPE Sheet Membrane

Name: PREFLEX 3000 1m x 20m Pre-Applied HDPE Sheet Membrane
Brand: Forspec Protective Coatings
SKU: PPRF398
Price: 880.00 AUD
Availability: InStock

$880.00

or 4 interest-free payments with

PREFLEX 3000 is a pre-applied HDPE, fully bonded waterproofing membrane. PREFLEX 3000 is supplied with a self-adhesive selvedge along one side of the roll to provide sealed laps. It consists of a multi-layer composite, including high-density PE film, a polymer layer, and a unique proprietary layer, which allows poured concrete to bond fully with the membrane, providing an excellent barrier against water passage between the waterproofing membrane and the structure.

Quantity: 1

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PREFLEX 3000 1m x 20m Pre-Applied HDPE Sheet Membrane

The Waterproofing Shop

Pickup available, usually ready in 24 hours

22/872 Canterbury Road
Roselands NSW 2196
Australia

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Product Details

This integral bond is specifically designed to provide a robust barrier against water, moisture, and gas, preventing both ingress and lateral migration. Selvedge overlaps deliver superior performance in harsh conditions without the need for specialized equipment, heat, or power.

ADVANTAGES:

Acts as a vapor barrier, forming a unique integral bond to the poured concrete and remaining in place if any ground settlement of substrate occurs.
Simple and reliable application with no primers or protection required.Combines toughness with flexibility for detailing around edges.
Resistant to groundwater and protects concrete from ground salts, chlorides, sulfates, and hydrocarbons in contaminated areas.
Unaffected by wet job site conditions, ensuring it doesn't activate prematurely.
Inherently waterproof as supplied, this passive, non-reactive waterproofing system does not require water activation.
Waterproofing is not dependent on confining pressures or hydration.

For more information about this product, see the Technical Data Sheet.

How to Use

Loose lay over prepared blinding before concrete pour

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PREFLEX 3000 1m x 20m Pre-Applied HDPE Sheet Membrane

$880.00

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Correct application makes all the difference.

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How to install

Watch the install

Step-by-step from prep to top coat. Filmed on the tools, not in a studio.

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Frequently asked questions

View all FAQs

What is PREFLEX 3000 used for?

Compatibility
PREFLEX 3000 is a pre-applied HDPE sheet membrane for below-slab and blindside waterproofing - laid before the concrete pour, bonds fully to the poured concrete via composite layers. Used for foundations, basements, and lift shafts where access for post-applied membrane is impossible.
How does pre-applied bonding work?

Performance
PREFLEX 3000 has a composite layer system that mechanically and chemically bonds to the freshly poured concrete - creating a permanent integral seal that prevents lateral water migration between membrane and structure. No primers or protection layers required.
How is it installed?

Installation
Lay the membrane HDPE-side-down against the substrate (blindside) or formwork. Overlap edges using the self-adhesive selvedge for sealed laps. Pour the concrete directly onto the membrane - the bond develops as concrete cures.
Coverage per roll?

Compatibility
20 m² per roll at 1.5mm thickness (with sand layer). Designed for 1m wide x 20m long format that handles full-area below-slab installations efficiently.
What environmental conditions does it handle?

Performance
PREFLEX 3000 flexes to -30°C without cracking, achieves over 500% elongation (tested 590-645%), and resists groundwater salts, hydrocarbons, and sulfates - the most aggressive below-grade chemistry.

PREFLEX 3000 1m x 20m Pre-Applied HDPE Sheet Membrane

Frequently bought together

Pool Waterproofing System

Retaining Wall System

Tank Waterproofing System

Pool System Build-Up

Retaining Wall System Build-Up

Tank System Build-Up

Pool Renovation

Below Ground Retaining Wall

Concrete Water Tank

Commercial Podium

Swimming Pool Construction

The Waterproofing Shop?

Frequently asked questions

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