Drinking water is an essential provision that requires clean, watertight facilities to process and store it. Sika offers a wide range of DWI regulation 31 approved products for both new build and refurbishment projects.
The waterproofing of reservoirs and tanks containing potable water must be:
- Durable over long periods
- Easily maintainable
- Certified and approved
- Harmless to health
- Allow swift return to service
Complete, Comprehensive Products and Systems
Sika waterproofing products used in potable water reservoirs and tanks comply with the strict regulations of public water authorities.
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.
Seal in Safety Today:
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
- Safe and harmless to health
- Compliant to local regulations
- Compatibility of systems
- Life cycle costing
- Conditions for application
- Return to service timeline
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® A+ pre-applied, fully-bonded TPO membrane
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 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
Sikadur-Combiflex® 930 post-applied, bonded tapes for construction and expansion joints
Sikadur-Combiflex® 933 post-applied, bonded tapes for construction and expansion joints
Sikasil® DW acetoxy silicone sealant for joints in contact with potable water.
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® - 581 Seal Rigid cementitious slurry coat
SikaTop® -586 Seal multi-purpose cementitious levelling mortar
SikaTop® - 588 Seal Flexible and elastomeric, 2 component cementitious slurry
Sika Solutions
Sikagard®-62 epoxy resin with DWI approved, rigid coating or reinforced multi-layer system
Sikalastic M 808 2 component flexible polyurethane coating
Sika Solutions
Sikalastic®-836 DW two-part, elastic, 100% solids, very fast curing and colored pure polyurea liquid applied membrane with good chemical resistance and WRAS drinking water approval.
Sika Solutions
Sikaplan® WT 4220 polyolefin flexible homogeneous smooth sheet membrane with a glass fiber reinforcing inlay, WRAS approved for potable water, 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 one-part, cementitious, polymer modified coating material used as bonding primer and reinforcement corrosion protection
Sika MonoTop®-4012 cementitious R4 concrete repair mortar containing recycled waste materials
Sika MonoTop®-615 one-component, polymer modified, high build repair and reprofiling mortar, meeting the requirements of Class R3 of EN 1504-3.
Sika Solution
Sikadur-Combiflex® SG post-applied, bonded tapes for construction and expansion joints
SikaSwell® A hydrophilic swelling profile for construction joints
Sikadur-Combiflex® 930 post-applied, bonded tapes for construction and expansion joints
Sikadur-Combiflex® 933 post-applied, bonded tapes for construction and expansion joints
Sikasil DW Sikasil® DW is a one part acetoxy curing silicone sealant especially designed for joints in contact with potable (drinking) water.
Drinking Water Projects
¹Source: Water UK