Tankguard DW JOTUN DW-type solvent-free epoxy potable water tank coating is a potable water tank coating of the epoxy system. It has been tested separately and certified for use in potable water storage. Suitable for properly prepared carbon steel, stainless steel, aluminium, composite materials and concrete substrates. Parameters on this page: volume solids 100%, dry film thickness 150–400 µm, theoretical spreading rate 6.7–2.5 m²/L. Comparable products of the same brand: Tankguard 412 JOTUN type 412 solvent-free epoxy potable water tank coating, Balloxy BT modified epoxy primer BT, Jota Armour II three-component abrasion-resistant polyamine-cured epoxy coating.
Parameter source: JOTUN manufacturer's Technical Data Sheet (TDS) "Tankguard DW JOTUN DW-type solvent-free epoxy potable water tank coating"; values such as spreading rate are converted from TDS parameters and are for product selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 100% |
|---|---|
| Dry Film Thickness | 150–400 µm |
| Theoretical Spreading Rate | 6.7–2.5 m²/L |
| VOC | GB/T 34682-2017 8.3 6 g/L (China) |
| Density / Specific Gravity | 1.4 kg/L |
| Number of Components | Two-component |
| Flash Point | 100 °C |
| Mixing Ratio | 2 parts : 1 part (by volume) |
| Gloss | Gloss (70–85) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Tankguard DW
This is a two-component solvent-free amine-cured epoxy coating. It is specifically designed for potable water storage tanks. It can be used as a primer or topcoat in atmospheric and immersion environments. Suitable for properly prepared carbon steel, stainless steel, aluminium, composite materials and concrete substrates.
Coating for potable water tanks and pipes. Independently tested and certified for potable water storage.
Others
Approved under BS 6920-1:2000 for potable water service.
Certified by the Norwegian Institute of Public Health for contact with potable water.
Complies with US FDA Title 21, Part 175.300 for contact with dry food; meets the requirements of ANSI/AWWA standard C210-07 and is suitable for water pipes.
Certified to NSF/ANSI/CAN 61 for potable water, and compliant with NSF/ANSI/CAN 600.
Other certificates and approvals are available on request.
Light grey, white
| Property | Test / Standard | Description |
| Volume Solids | ISO 3233 | 100% |
| Gloss (GU 60°) | ISO 2813 | Gloss (70–85) |
| Flash Point | ISO 3679 Method 1 | 100 °C |
| Density | Theoretical Value | 1.4 kg/L |
| Region | Regulations | Test / Standard | VOC Value |
| US | CARB(SCM)2020 / SCAQMD rule 1113 | Calculation | 2 g/L |
| Hong Kong | Air Pollution Control (VOC) Regulation | Calculation | 2 g/L |
| EU | European Paint Directive 2004/42/CE | Calculation | 2 g/L |
| China | GB 30981-2020 Limit of harmful substances of industrial protective coatings | GB/T 34682-2017 8.3, 6 g/L |
The data listed are based on factory batch production and may vary slightly with colour.
| Gloss description | According to JOTUN's definition of functional coatings |
|---|
Typical recommended specification range
| Dry Film Thickness | 150–400 µm |
| Wet Film Thickness | |
| Theoretical Spreading Rate | 6.7–2.5 m²/L |
Surface Preparation
| Substrate | Minimum | Recommended |
| Carbon Steel | Sa 2½ (ISO 8501-1) | |
| Stainless steel | The surface should be blasted with a non-metallic abrasive, | “Blast clean using an approved non-metallic abrasive |
| hand- or machine-sanded using abrasive paper or fibre discs, | to produce a sharp angular surface profile.” | |
to produce scratch marks on the surface.
| Aluminium | The surface should be blasted with a non-metallic abrasive, | “Blast clean using an approved non-metallic abrasive |
| hand- or machine-sanded using abrasive paper or fibre discs, | to produce a sharp angular surface profile.” |
| Composite | The surface must be roughened by hand or machine to produce a rough surface | |
| Concrete | Dry abrasive blast clean to SSPC-SP 13 / NACE No. 6. | |
The recommended surface preparation provides optimum properties including adhesion, corrosion resistance, heat resistance and chemical resistance.
This product may be applied by the following methods
| Spray: | Apply by airless spray. |
| Brush: | Recommended for touch-up and small-area application. Take care to achieve the specified dry film thickness. |
| Tankguard DW Comp A — JOTUN Solvent-Free Epoxy Potable Water Tank Coating DW, Component A | 2 parts |
| Tankguard DW Comp B — JOTUN Solvent-Free Epoxy Potable Water Tank Coating DW, Component B | 1 part |
Do not add thinner.
Cleaning equipment
| Before application | The preferred cleaning solvent is JOTUN Thinner No. 28. If unavailable, JOTUN Thinner No. 4 may be used. |
|---|---|
| After application | Jotun Thinner No. 17 |
| Nozzle tip size (inch/1000): | 19-25 |
| Nozzle pressure (minimum): | 175 bar/2500 psi |
| Substrate Temperature | 10 °C | 23 °C | 40 °C |
| Touch Dry | 15 h | 10 h | 3 h |
| Walk-on Dry | 25 h | 13 h | 5 h |
| Minimum recoat interval | 25 h | 13 h | 5 h |
| Dry/cured to immersion | 14 days | 7 days | 4 days |
For the maximum recoat interval, refer to the Application Guide (AG) for this product.
Drying and curing times are determined based on temperature and relative humidity below 60%, with dry film thickness within the average range.
| Touch Dry | The state at which light finger pressure leaves no mark or stickiness. |
|---|---|
| Walk-on Dry | The minimum time after which the coating allows normal foot traffic without leaving permanent footprints, marks or other physical damage. |
Minimum recoat interval after drying: the recommended minimum interval before applying the next coat.
Dry/cured to immersion: the minimum time before the coating can be permanently immersed in sea water.
| Paint temperature | 23 °C |
| Induction Time | 5 min |
| Pot Life | 30 min |
| Induction time and pot life are reduced at higher temperatures |
Temperature
| Drying, atmospheric | Continuous 120 °C | Peak 140 °C |
| Immersed, sea water | 50 °C | 60 °C |
Withstands peak temperatures for a maximum of one hour.
At the above temperatures, protective performance is unaffected, but appearance may be affected.
Note: this coating can withstand different immersion temperatures, depending on the specific chemical and whether immersion is continuous or intermittent. Heat resistance is affected by the coating system as a whole. When used with other coatings, ensure that all coatings in the system have similar heat resistance.
Depending on the actual exposure conditions in service, this product may be used with various primers and topcoats. Some reference systems are listed below. For specific systems, contact JOTUN.
| Subsequent Coat | itself |
|---|
Cleaning procedure for potable water tanks:
After full curing, the coating should be thoroughly cleaned before the tank is used to store potable water.
The certification issued by the Norwegian Institute of Public Health specifies several feasible procedures. As an option, one of the following procedures may be used:
- High-pressure washing with fresh water at a water temperature of at least 30°C.
- Steam cleaning.
- Manual scrubbing of the tank with warm water and alkaline detergent.
The tank inner walls should then be rinsed with clean fresh water.
BS 6920 certification does not set explicit requirements for the cleaning procedure; the only requirements are that the coating be properly cured and that the tank be rinsed with fresh water before being put into service.
For warm water, it is recommended that the coating be held at 23°C for 7 days and exposed to fresh water capable of raising the steel plate temperature to 50°C ± 2°C and maintaining it for 4 h, so that the coating achieves proper curing.
When cleaning is complete, the water in the tank should be pumped out. Residual water after pumping should be removed with towels and rags to ensure contaminants are removed. Reliance on evaporation will only increase the concentration of residual contaminants.
Contact the local JOTUN technical service team for further information, or refer to the application instructions.
| Volume | Container Size | |
| (L) | ||
| Tankguard DW Comp A — JOTUN Solvent-Free Epoxy Potable Water Tank Coating DW, Component A | 10 | 20 |
| Tankguard DW Comp B — JOTUN Solvent-Free Epoxy Potable Water Tank Coating DW, Component B | 5 | |
The packaging sizes above are typical reference sizes for factory batch production. Due to regional regulatory differences, packaging sizes and capacities may vary by region.
Store in accordance with national regulations. Keep containers in a dry, cool, well-ventilated place away from heat and sources of ignition. Keep containers tightly closed. Handle with care.
| Tankguard DW Comp A — JOTUN Solvent-Free Epoxy Potable Water Tank Coating DW, Component A | 12 months |
| Tankguard DW Comp B — JOTUN Solvent-Free Epoxy Potable Water Tank Coating DW, Component B | 12 months |
In some markets, the stated shelf life may be shortened to comply with local legal requirements. The above is the minimum shelf life; thereafter, testing is required to confirm quality remains acceptable.
This product can contribute to green building standard credits. Visit Jotun.com for more information or contact your local JOTUN representative.
EPDs are available at www.epd-norge.no
| Sanitary licence approval number | (Jiangsu) Health Water Permit No. (2016) 3200-0156 |
|---|---|
| Product standard | Q/ZDTL106-2020, JOTUN Solvent-Free Potable Water Tank Coating. Main ingredients: |
- Component A (epoxy resin, glycidyl ether, barium sulfate, titanium dioxide, talc, calcium silicate, polysiloxane surfactant, modified wax, defoamer)
- Component B (epoxy hardener)
Touch dry: 10 h / Hard dry: 13 h
| Manufacturer name | JOTUN Coatings (Zhangjiagang) Co., Ltd. |
|---|---|
| Manufacturer address | 39 Nanhai Road, Yangtze International Chemical Industrial Park, Zhangjiagang Bonded Area, Suzhou, Jiangsu Province, 215634 |
| Contact | 0512-58937988 |
For professional use only. Applicators and workers must be trained, experienced, capable and equipped to mix, stir and apply the coating correctly in accordance with JOTUN's technical documents. Applicators and workers must wear appropriate personal protective equipment when using this product. This guidance is provided based on current product knowledge. Any proposed modification to suit site conditions must be approved by the responsible JOTUN representative before use.
Read the safety warnings on the container packaging. Use in well-ventilated conditions. Avoid inhaling spray mist and avoid skin contact. In case of accidental splashes on skin, wash immediately with a suitable cleaner, soap and water. In case of eye contact, rinse thoroughly with water and seek medical attention immediately.
When used primarily as a primer or antifouling coating, products may show slight colour variation from batch to batch. Such products, and epoxy products used as topcoats, may chalk when exposed to sunlight.
Gloss and colour retention of topcoats depend on the colour type, the surrounding environment such as temperature and UV intensity, application quality and product type. Contact your local JOTUN office for further information.
The information in this datasheet is based entirely on knowledge gained in our laboratory and in practice. JOTUN products are regarded as semi-finished products, and their use is generally beyond our control. JOTUN therefore guarantees only the quality of the product itself. To comply with local regulations, the product may be adjusted, and we reserve the right to modify the datasheet without further notice.
Users should consult JOTUN for specific guidance on the suitability of the product for their requirements and applications.
In case of any discrepancy between language versions, the English (UK) version shall prevail.
Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
