EVA Waterproof Membrane

EVA waterproof membrane is a kind of anti-seepage material composed of high molecular polymer as the basic material, which can prevent liquid leakage and gas volatilization.

Its a thin, flexible, and impermeable sheet made from a combination of ethylene and vinyl acetate polymers.

Area of Application:

It is commonly used in:

Durable

Highly durable and resistance to punctures

UV Resistance

Excellent resistance to UV radiation, ozone and chemical exposure

Strengthy Bond

Heat welded seams create strong bonds, enhancing the overall strength of roofing system

Recyclable

It is environmental friendly as compared to other roofing materials

Data Sheet

Product Details

EVA waterproof membrane is a kind of anti-seepage material composed of high molecular polymer as the basic material, which can prevent liquid leakage and gas volatilization.

Its a thin, flexible, and impermeable sheet made from a combination of ethylene and vinyl acetate polymers.

Excellent crack resistance
Excellent weather resistance
Strong elasticity, light specific gravity, high elongation
No open flame, easy to apply

Uses

Weidun 9005 EVA Waterproofing Membrane is designed for tunnel waterproofing project.

How To Use

Surface Preparation

The surface of the tunnel walls and floor need to be cleaned and prepared for the application of the EVA waterproofing membrane. This may involve removing any existing coatings, smoothing out any rough areas, and ensuring that the surface is dry and free of debris.

Primer application

A primer is typically applied to the prepared surface in order to promote adhesion between the surface and the EVA waterproofing membrane. The primer may need to cure for a specified period of time before the next step can be taken.

Membrane Installation

The EVA waterproofing membrane is then applied to the prepared and primed surface using an adhesive or heat-welding method. The membrane is typically rolled out and cut to fit the dimensions of the surface, with care taken to ensure that it is installed without any wrinkles or bubbles.

Seaming

The seams between adjacent sheets of EVA waterproofing membrane need to be sealed in order to prevent water from seeping through. This may be done using heat welding or by applying a separate sealing tape.

Backfilling

Once the EVA waterproofing membrane has been installed and inspected, the tunnel can be backed with soil or other materials as necessary.

Advantages

Excellent water resistance -suitable for applications where water pressure is high, such as tunnels
Flexibility – can be bent and wrapped around complex tunnel geometries, ensuring a tight seal and preventing water intrusion
Durability -resistant to degradation from UV light, chemicals, and extreme temperatures,ensuring, a long service life
Cost effective- Especially for large tunnel project.

Storage and Handing:

To prevent damage, support rols on end in an upright position and store in a clean,dry location, covering as necessary to protect from environment damage.

Monitor environmental conditions during storage, handing and application.

Technical Data Sheet

Property	Standard Minimum Value	Weidun Value
Roll Length min(m)	10	10.01
Tensile Strength at 23°c (N/50mm)	300	357
Elongation at 23°C +/-2°C, (%)	300	400
Adhesive strength at 23°C (N/50mm)	1.5	1.5
Low temperature flexibility, at-20°C	No crack	No crack
Peel strength between membrane and overlap (N/mm)	1.0	1.0
Puncture resistance (N)	350	398
Oil pereability / number of sheets	0	0
Heat resistance, at 80°C, 2 hours	No drop	No drop
Water penetration (Maintain a water pressure of 0.3MPa for 120 minutes)	Non- penetration	Non-penetration

Product Specifications

Roll Size*	Customizable
Roll Length	Customizable
Roll Width	3.0m
Pail Weight	Customizable
Full Pallet	Weight N/A

Throughout the construction process, it is important to follow best practices for safety and quality, including wearing appropriate personal protective equipment, ensuring proper ventilation in enclosed spaces, and following the manufacturer’s instructions for product application and handling.