Exceptional flexibility and root/chemical resistance. Ideal for severe hydrostatic pressure in tunnels. Superior seam weldability and durability. Available guarantee of up to 25 years.
Product Highlights
Strong, durable and manufactured to consistent dimensions
Enjoy a zero-maintenance with a 20-year warranty for the quality you can trust
Offer superior performance based on your region's unique climate needs
Weidun® 008 EVA Waterproofing 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.
Weidun® 008 EVA Waterproofing Membrane is designed for tunnel waterproofing project.
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.
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.
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.
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.
Once the EVA waterproofing membrane has been installed and inspected, the tunnel can be backed with soil or other materials as necessary.
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.
| 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 permeability / number of sheets | 0 | 0 |
| Heat resistance at 80°C for 2 hours | No drop | No drop |
| Water penetration (0.3 MPa for 120 min) | Non-penetration | Non-penetration |
| Parameter | Value |
|---|---|
| Roll Size | Customizable |
| Roll Length | Customizable |
| Roll Width | 3.0 m |
| Pail Weight | Customizable |
| Full Pallet Weight | N/A |
Ethylene Vinyl Acetate (EVA) high-polymer waterproofing membrane specially formulated for heavy civil infrastructure, tunnels, and deep foundations.
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