Waterproof Membrane Manufacturer – PVC, TPO, EPDM, HDPE Waterproofing Solutions

What Is a Waterproof Membrane?

A waterproof membrane is a functional polymer sheet designed to prevent water penetration, moisture infiltration, chemical corrosion, and structural leakage in construction and industrial applications. DERFLEX waterproof membranes offer:

• High water resistance and waterproof pressure tolerance
• Strong elasticity and flexibility for structural movement
• UV and aging resistance for long-term outdoor exposure
• Excellent tear, puncture and chemical resistance
• Thermal welding compatibility for airtight installation

Our waterproof membranes comply with international standards including ISO, ASTM, CE, making them suitable for architectural, municipal, geotechnical, and industrial waterproofing systems.

Types of Waterproof Membranes Available from DERFLEX

1. PVC Waterproof Membrane

PVC waterproofing membrane is highly durable with excellent tensile strength, weldability, and chemical resistance. Ideal for:

• Roofing systems
• Basements and foundations
• Tunnel waterproofing
• Underground structures

2. TPO Waterproof Membrane

Thermoplastic Polyolefin membranes are environmentally friendly, UV-stable, and widely used in roofing.

3. EPDM Waterproof Sheet

EPDM rubber membranes provide exceptional weatherability and elastic performance, ideal for extreme climate conditions.

4. HDPE Geomembrane

HDPE waterproof liners are used in large engineering projects, offering outstanding chemical resistance and impermeability.

5. TPU Waterproof Film

TPU membranes deliver superior elasticity, abrasion resistance, and low-temperature flexibility.

6. Composite Waterproof Membranes

Multi-layer membranes combining geotextile + polymer film for geotechnical and municipal applications.

Main Features of DERFLEX Waterproof Membranes

1. Superior Waterproof Performance

DERFLEX membranes provide complete protection against water leakage, hydrostatic pressure, and moisture vapor.

2. UV & Weather Resistance

Our products are suitable for long-term outdoor exposure with up to **15–25 years** service life.

3. Excellent Flexibility

Even in cold environments, membranes maintain flexibility to accommodate structural movement.

4. Strong Puncture & Tear Resistance

Ideal for construction, industrial and environmental engineering projects.

5. Chemical & Microbial Resistance

Resistant to acids, alkalis, oils, and microorganisms, ideal for landfills, wastewater plants and chemical facilities.

6. Environmentally Friendly Options

TPO, EPDM and HDPE membranes are recyclable and comply with green building requirements.

Applications of Waterproof Membranes

Building & Construction

• Commercial & residential roofing
• Basements & foundations
• Parking decks
• Bathroom & wet area waterproofing

Tunnels & Underground Structures

• Tunnel lining
• Metro systems
• Subway stations
• Underground passages

Environmental Engineering

• Landfill liners
• Leachate ponds
• Wastewater treatment
• Mining sites

Agricultural & Aquaculture Projects

• Fish ponds
• Water reservoirs
• Irrigation canals
• Silage pits

Industrial Waterproofing

• Chemical storage areas
• Cooling towers
• Oil containment and secondary liners

Technical Specifications

Why Choose DERFLEX as Your Waterproof Membrane Supplier?

1. 20+ Years of Manufacturing Experience

DERFLEX has supplied waterproofing materials to more than 80 countries, supporting global construction projects.

2. Full Range of Materials

• PVC roofing membrane
• TPO waterproof sheet
• EPDM rubber membrane
• HDPE geomembrane
• TPU specialty membranes

3. Strict Quality Control

• Raw material inspection
• Thickness and tensile testing
• Welding strength testing
• UV aging test

4. Custom Production Available

• OEM & ODM
• Custom width, thickness, color
• Brand printing

5. Global Project Support

DERFLEX provides technical support, sample testing, and complete documentation for engineering bidding.

Installation & Usage Guide

1. Surface Preparation

Ensure the substrate is clean, dry, smooth and free of sharp objects.

2. Welding Methods

• Hot air welding
• Hot wedge welding
• Solvent / adhesive bonding (depending on material)

3. Overlap Requirements

Overlap width should be **≥ 50–80 mm** to ensure waterproofing integrity.

4. Storage

• Keep rolls in dry, ventilated warehouse
• Avoid direct sunlight and heat sources

FAQ – Waterproof Membrane

1. What is the best waterproof membrane for roofing?

PVC and TPO membranes are the most widely used for commercial and industrial roofing.

2. Can waterproof membranes be used underground?

Yes, DERFLEX membranes are suitable for basements, tunnels, and foundation waterproofing.

3. What is the lifespan of a waterproof membrane?

Depending on material, the lifespan ranges from **10 to 25+ years**.

4. Do you support OEM production?

Yes, DERFLEX provides OEM/ODM waterproof membrane manufacturing and custom printing.

5. Can you provide samples for testing?

Yes, sample rolls and testing data sheets are available.