Potable water is an essential provision that requires absolutely clean, watertight facilities to process and store it.
The waterproofing of reservoirs and tanks containing potable water must be:
- Watertight over long periods
- Easily maintainable
- Food safe
- Harmless to health
Drinking Water Facilities by Region
Complete, Comprehensive Products and Systems
Sika waterproofing products used in potable water reservoirs and tanks comply with the strict regulations of public water authorities. The food and beverage industry relies on the high performance of Sika waterproofing systems in their process water tanks.
As the global leader in providing structural waterproofing solutions, Sika has the most complete, comprehensive range of products and systems. They are designed and can be adapted to meet the specific needs and requirements of owners of water reservoirs, architects, engineers and contractors on site.
Typical Exposures and Tips for Design
There are many factors that may affect the degradation of water tanks and structures in water treatment plants. By understanding the cause of damage, you can better know how to treat it, repair it and prevent it from long-term deterioration. These are the most common exposures affecting water storage areas.
General Considerations for Design and Specification
- Durability and water-tightness
- Exposures, site conditions and ecology
- Easily maintainable
- Food safe and harmless to health
- Compatibility of systems
- Life cycle costing
1. External Waterproofing
To keep drinking water in below-ground storage tanks clean, it has to be protected from groundwater entering the structure.
Sika Solutions
SikaProof®-808 pre-applied, fully-bonded TPO membrane
Sika Solutions
SikaShield® W pre- and post-applied, wet-bonded bitumen waterproofing membrane, self-protected by a cross-laminated HDPE film
Sika® Igolflex® bitumen based liquid coating
2. Concrete Solutions
The Sika Watertight Concrete System offers a comprehensive solution for watertight structures. The system consists of concrete that has been specially modified with Sika admixtures to produce waterproof concrete and carefully selected waterstops for construction and movement joints. Watertight concrete structures can be designed to keep water in or out, or both.
Sika Solution
Sika® WT-200 P Crystalline powder
Sika Solutions
Sika Waterbar® PVC and TPO waterstops for construction and expansion joints
SikaSwell® A hydrophilic swelling profile for construction joints
Sikadur-Combiflex® SG post-applied, bonded tapes for construction and expansion joints
3. Internal Waterproofing and Protection
Sika provides a wide range of different waterproofing systems and solutions. The selection of the best system for a specific project depends on many factors, including local water conditions. The most suitable waterproofing system depends on the nature of the reservoir structure and the water quality.
Sika Solutions
SikaTop®-107 Seal two-component, polymer-modified rigid waterproofing and protection mortar
Sikalastic®-152 two-component, polymer-modified, flexible, crack-bridging, fiber-reinforced mortar
Sika Solutions
Sikagard®-62 epoxy resin with WRAS approval, rigid coating or reinforced multi-layer system with crack-bridging ability
Sikagard®-63 N is a two-component, rigid, total solid, epoxy resin based protective coating
Sika Solutions
Sikalastic®-851 R two-component, elastic, crack-bridging, rapid-curing modified polyurethane / polyurea-hybrid membrane
Sikalastic®-8850 is a two-component, pure polyurea, elastic, very fast curing, waterproofing membrane
Sika Solutions
Sikaplan® WT 4220 polyolefin flexible homogeneous smooth sheet membrane with a glass fiber reinforcing inlay, WRAS approved for potable water, thermally welded
Sikaplan® WT 4300 polyolefin flexible homogeneous smooth sheet membrane with a glass fiber reinforcing inlay, thermally welded
4. Concrete Repair
When there is loss of water in reservoirs or tanks due to localized damage in the rigid waterproofing system, the appropriate repair must be done. It should be compatible with the waterproofing system, whether watertight concrete or lined with waterproofing mortar layers.
Sika Solutions
Sika MonoTop®-1010 ZA one-part, cementitious, polymer modified coating material used as bonding primer and reinforcement corrosion protection
Sika MonoTop®-4012 ZA cementitious R4 concrete repair mortar containing recycled waste materials
Sika Solutions
Sika® Injection-201 CE two-component PU injection resin with drinking water approval
Sika® Injection-307 three-component injection resin based on acrylate for waterproofing cracks and joints into structural concrete
Sika Solution
Sikadur-Combiflex® SG post-applied, bonded tapes for construction and expansion joints
Sika Solutions
SikaTop®-107 Seal two-component, polymer-modified rigid waterproofing and protection mortar
Sikalastic®-152 two-component, polymer-modified, flexible, crack-bridging, fiber-reinforced mortar
Document Library
See Some of Sika's Past Potable Water Projects
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¹Source: Swiss Agency for Development and Cooperation SDC