Sikaplan WT 4220-15 C | Drinking Water Tank Waterproofing Membrane

FPO-PE Based, Microbiologically Resistant Waterproofing Solution

Product Description

Sikaplan® WT 4220-15 C is a high-performance waterproofing membrane made from flexible polyolefin (FPO-PE), reinforced with glass fiber and manufactured with a 1.5 mm thickness. It has been specially developed for the internal waterproofing of closed drinking water storage tanks.

Developed by Sika, a global manufacturer of construction chemical solutions, the product provides a reliable waterproofing system for water structures where hygiene, durability, and long service life are essential.

Thanks to its resistance to soft water and microbiological effects, Sikaplan® WT 4220-15 C offers a safe and durable solution for drinking water applications. The membrane can be welded with hot air, ensuring fully watertight and secure joints.

Key Features of Sikaplan® WT 4220-15 C

✔ Microbiological Resistance
Provides resistance against bacteria and fungal growth, making it suitable for drinking water storage applications.

✔ Resistance to Soft Water
Designed for safe use in environments where the membrane is continuously exposed to drinking water.

✔ Glass Fiber Reinforced Structure
Improves dimensional stability and enhances mechanical performance.

✔ Hot Air Weldable
Creates homogeneous and fully watertight joints between membrane sections.

✔ Flexible Polyolefin (FPO-PE) Formulation
Offers excellent chemical resistance and long-term durability.

✔ Requires Professional Installation
Expert application is recommended to achieve maximum hygiene, waterproofing performance, and system reliability.

Application Areas

Sikaplan® WT 4220-15 C is suitable for:

• Closed drinking water storage tanks
• Portable water tanks
• Reservoir and dam projects
• Reinforced concrete water structures requiring waterproofing and hygiene protection

It is especially suitable for surfaces that are in direct contact with drinking water and require a reliable internal waterproofing layer.

Technical Specifications

Material: Flexible polyolefin (FPO-PE), glass fiber reinforced
Thickness: 1.50 mm
Unit Weight: 1.30 kg/m²

Roll Dimensions:
2.00 m × 20.00 m
(Custom lengths available)

Surface Type: Smooth
Color: Light blue

Ambient Temperature Range: +5 °C to +35 °C
Surface Temperature Range: 0 °C to +35 °C

Certifications and Standards

• EN 13361 – Geosynthetic barriers for reservoirs and dams
• CE Marking
• EN ISO 9001 / 14001

Why Choose Sikaplan® WT 4220-15 C?

For drinking water storage systems, the most critical performance requirements are:

• Hygiene safety
• Long service life
• Chemical resistance
• Complete waterproofing performance

Sikaplan® WT 4220-15 C provides a reliable internal lining solution with its microbiological resistance, soft water resistance, dimensional stability, and secure hot air welded joints.

In water structures, installation errors can lead to serious long-term problems. Choosing the right membrane system combined with professional application ensures a safe, durable, and reliable waterproofing solution.

Frequently Asked Questions (FAQ)

Is Sikaplan® WT 4220-15 C suitable for contact with drinking water?

Yes. The membrane is resistant to microbiological effects and soft water, making it suitable for drinking water storage applications.

How is Sikaplan® WT 4220-15 C installed?

The membrane sheets are joined using hot air welding technology to create secure and watertight connections. Installation should be carried out by experienced professionals.

Where can Sikaplan® WT 4220-15 C be used?

It can be used in closed drinking water tanks, portable water storage systems, reservoirs, dams, and reinforced concrete water structures.

What is the thickness and roll size of the product?

Sikaplan® WT 4220-15 C has a thickness of 1.50 mm and is supplied in standard 2 m × 20 m rolls.