Popular: Sikaflex · waterproofing · grout · data sheets
Clarifiers, filter beds, clear-water reservoirs and process tanks need watertight concrete, sealed joints and the right lining for each water type. Drinking-water compartments take only products approved for potable contact.
General guidance based on the manufacturer data sheets. Site conditions differ: confirm the system with MCT before you start. Where we do not name a product, ask us and we will confirm the right one.
SikaControl-760 lists sewage and water treatment plants (p.1). Cast Sika Waterbar V-20 L SH into construction joints and O-20 SH into expansion joints (sewage plants and reservoirs, p.1). SikaFuko Swell-1 is a re-injectable hose for construction joints only, installed by trained contractors (p.1, p.2).
SikaControl®-760 should be used in all structural concrete that is constantly or intermittently in contact with water such as sea walls, tunnels, basements, structural and precast concrete. SikaControl®-760 can also be used as crystalline waterproofing admixture for cement mortars and plasters. T… (TDS p.1)
Sika Waterbar® V-20 L SH is used to waterproof construction joints in concrete structures such as those in water retaining structures, including reservoirs, canals, sewage plants, dams, swimming pools etc. (TDS p.1)
Sika Waterbar® O-20 SH are used to waterproof expansion joints in concrete structures such as those in water retaining structures, including reservoirs, canals, sewage plants, dams, swimming pools etc. (TDS p.1)
Sealing construction joints Suitable for many different structures and construction methods where additional joint security/safety is required Prevents water ingress through concrete joints in the following typical structures: Water retaining or excluding s… (TDS p.1)
List each tank as drinking water (clear-water reservoir, treated-water channels) or process and wastewater. The product rules are different. Structural defects need an engineer's assessment.
Plug running holes with SikaSet Waterplug (NSF/ANSI 61 for potable water contact, p.1). Inject water-bearing cracks with Sika Injection-306, experienced professionals only (p.1). Rebuild with SikaEmaco S 488, listed for water treatment facilities before subsequent coating (p.1).
Non-moving (static) cracks and holes with running water or moisture seepage For immersion service For anchoring vertical bolts Basements Foundations Retaining walls Sewers Locations Vertical, overhead, or horizontal Interior or exterior Above or below grade… (TDS p.1)
SikaEmaco® S 488 is used for the structural repair of concrete elements such as: Columns, piers and cross beams of bridges, Cooling towers and chimneys and other industrial environments, Water treatment and sewerage facilities before subsequent coating, Tunnels, pipes, outfalls and all below grou… (TDS p.1)
The right product here depends on your site. We confirm it before naming it.
Use only SikaTop-550 Seal (BS 6920, p.1) or Sikagard PW (direct potable water contact, p.1; professionals only). Follow local cleaning and disinfection rules before putting them into service (Sikagard PW p.3).
As a waterproof lining for water retaining structures. (TDS p.1)
Chemical resistant protective layer on concrete, structural cementitious mortars, epoxy cement, epoxy resin based products and steel Protection of concrete surfaces / foundations below ground level Lining in storage tanks, manholes, intakes and silos etc. (TDS p.1)
Sika Permacor-3326 EG H lines process water, waste water and chemical storage tanks and sludge digesters (p.1). Sikagard-63 N is a chemical-resistant lining for sludge and chemical tanks (p.1). Both are for experienced professionals only (p.1).
Sika® Permacor®-3326 EG H is ideally suited for the corrosion protection of steel and concrete surfaces exposed to various media. (TDS p.1)
Chemical resistant protective coating on: Concrete, Stone, Cementitious mortars, Renderings, Epoxy cement, Epoxy resin-based products. (TDS p.1)
In drinking-water compartments, use Sikaflex PRO-3 WF (BS 6920, p.1; sewage treatment plants also listed, p.1). In process tanks, Sikadur-Combiflex SG-20 P tape seals movement joints, construction joints, cracks and pipe penetrations (p.1). Never polysulphide sealants in drinking-water compartments (Sika Polysulphide GG p.2).
Sikaflex® PRO-3 WF is designed for movement and connection joints in floors, pedestrian and traffic areas (e.g. (TDS p.1)
Sikadur-Combiflex® SG-20 P is used for sealing: Movement joints, Construction joints, Pipe penetrations, Cracks, Building components where differential settlement is expected Sikadur-Combiflex® SG-20 P is used for the following areas:, Tunnels. (TDS p.1)
A starting point for a site proposal. Quantities, prices and the final specification follow a site visit or photos.
| Step | Product | Pack | Source |
|---|---|---|---|
| 1. New plants: watertight concrete and joints | SikaControl-760 | SikaControl®-760 is available in 5 Kg & 25 kg pack. | TDS p.1 · March 2025, Version 04.01 |
| 1. New plants: watertight concrete and joints | Sika Waterbar V-20 L SH | — | TDS p.1 · May 2021, Version 01.01 |
| 1. New plants: watertight concrete and joints | Sika Waterbar O-20 SH | 15 m rolls | TDS p.1 · May 2021, Version 02.01 |
| 1. New plants: watertight concrete and joints | SikaFuko Swell-1 (professionals) | Combi-pack box containing: | 40 m SikaFuko® Swell-1 hose | 6 Injection Port Assemblies… | TDS p.1 · May 2021, Version 01.01 |
| 3. Stop leaks and repair the concrete | SikaSet Waterplug | — | TDS p.1 · September 2024, Version 02.01 |
| 3. Stop leaks and repair the concrete | SikaEmaco S 488 | 25 kg bag | TDS p.1 · June 2025, Version 05.01 |
| 4. Line drinking-water compartments | SikaTop-550 Seal | — | TDS p.1 · March 2024, Version 01.01 |
| 4. Line drinking-water compartments | Sikagard PW (professionals) | — | TDS p.1 · May 2021, Version 02.01 |
| 5. Line process and wastewater tanks | Sika Permacor-3326 EG H (professionals) | — | TDS p.1 · December 2022, Version 05.02 |
| 5. Line process and wastewater tanks | Sikagard-63 N (professionals) | 10 kg Kit consisting of | TDS p.1 · May 2025, Version 04.02 |
| 6. Seal joints | Sikaflex PRO-3 WF | — | TDS p.1 · May 2021, Version 02.01 |
| 6. Seal joints | Sikadur-Combiflex SG-20 P | — | TDS p.1 · May 2025, Version 04.01 |
Sikagard PW is listed as suitable for direct potable water contact and as sewage resistant (p.1). It is for experienced professionals only (p.1).
Sika Waterbar V-20 L SH is cast into construction joints and O-20 SH into expansion joints (p.1). SikaFuko Swell-1 seals construction joints by swelling and later injection, and is not for movement joints (p.1, p.2).
Yes, if SikaFuko Swell-1 was installed during construction: it can be injected and re-injected at a later stage (p.1).
Sikaflex PRO-3 WF, tested to BS 6920 for drinking water contact (p.1). Do not use polysulphide sealants, whose data sheet says not to use them in contact with drinking water (Sika Polysulphide GG p.2).
Steps and product facts are taken from the manufacturer data sheets (page cited). Products are named only where the data sheet confirms the use; quantities follow a site visit or photos. General guidance: check the data sheet or ask us before you start.