SteelMaster 1200WF Interior Intumescent Fire Protection Coating for Structural Steel is a fire protection coating. An intumescent fire protection system designed for structural steel, widely suitable for various I-beams, columns and hollow sections. Independently certified for the fire protection of structural steel exposed to cellulosic fires. Parameters on this page: volume solids 69 ± 3%, dry film thickness 210–690 µm, number of components one. Comparable products from the same brand: Jotachar 1709 XT Epoxy Intumescent, Jotachar 1709 Exterior Intumescent Fire Protection Coating for Structural Steel, Jotachar JF750 XT Epoxy Intumescent.
Source: JOTUN original technical data sheet (TDS) "SteelMaster 1200WF Interior Intumescent Fire Protection Coating for Structural Steel"; spreading rate and other values are converted from TDS parameters and are for 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 | 69 ± 3% |
|---|---|
| Dry Film Thickness | 210–690 µm |
| Theoretical Spreading Rate | — |
| VOC | 39 g/L (China) |
| Density / Specific Gravity | 1.4 kg/L |
| Number of Components | One-component |
| Flash Point | 101 °C |
| Thinner | Fresh water |
| Wet Film Thickness | 300–1000 µm |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
SteelMaster 1200WF
This is a single-component, thin-film intumescent water-borne acrylic coating. Independently certified for fire protection of structural steel exposed to cellulosic fires. In atmospheric environments, it may be used as an intermediate coat or topcoat. Suitable for carbon steel substrates coated with an approved primer.
Designed as an intumescent fire protection system for steel structures, widely applicable to various I-beams, columns and hollow sections. Suitable for steel structures exposed to internal environments.
Contact your local JOTUN representative for the detailed application procedure document.
Others
BS 476 Parts 20/21: Certifire CF 5243 (fire resistance up to 180 minutes)
Suitable for open beams (RT1356)
Tested and assessed per EN 13381-8 (fire resistance up to 150 minutes).
Tested and assessed per EN 13381-6 for concrete-filled hollow steel columns. CE-marked product conforming to European Technical Assessment ETA-22/0351. Australia AS 4100. VKF/AEAI Certificate No. 33503.
| Durability and serviceability | Z2, Z1, Y (EAD 350402-00-1106) |
|---|---|
| Fire resistance | Class B-s1, d0 (EN 13501-1) |
ASTM E84: Class A. Tested and certified per GB 14907:2018.
Other certificates and approvals are available on request.
White
| Property | Test / Standard | Description |
| Volume Solids | ISO 3233 | 69± 3 % |
| Flash Point | ISO 3679 Method 1 | 101 °C |
| Density | Theoretical Value | 1.4 kg/L |
| Region | Regulations | Test / Standard | VOC Value |
| US | CARB(SCM)2020 / SCAQMD rule 1113 | Calculation | 66 g/L |
| Hong Kong | Air Pollution Control (VOC) Regulation | Calculation | 66 g/L |
| EU | European Paint Directive 2004/42/CE | Calculation | 32 g/L |
| China | Mandatory national standard of China | GB 30981.2-2025 | 39 g/L |
Coating hazards: GB 30981.2-W-Pb≤1000-NC. The data listed are based on factory batch production products and may vary slightly with colour.
Solids content measured in accordance with ISO 3233 and the ASFP-BCF guidance method.
Typical recommended specification range
| Dry Film Thickness | 210–690 µm |
| Wet Film Thickness | 300–1000 µm |
All steelwork must be coated at the correct film thickness to achieve the required fire rating. Refer to the current thickness tables. For details, consult your local JOTUN office.
| Note | The single-coat film thickness applies to airless spray only. |
|---|
Maximum permitted dry film thickness (BS and EN certificates)
Where measured thickness exceeds the limit, the measured thickness must be reduced by suitable means, based on the maximum thickness permitted by the profile and layout of the specific section.
I-beam/H-beam, 3-sided fire exposure: 5011 µm. I-beam/H-beam, 4-sided fire exposure: 5011 µm. I-column/H-column, 4-sided fire exposure: 7408 µm. Rectangular hollow section, 3- or 4-sided fire exposure: 3286 µm (BS standard only).
CHS & RHS columns, 4 sides, 9451 µm
For further information, see the Application Guide.
Surface Preparation
| Substrate | Minimum | Recommended |
| Coated surface | A clean, dry and sound compatible primer. | |
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. |
One-component
| Thinner | Fresh water |
|---|
The product is ready to use. Thinning affects sag resistance and delays drying time.
| Cleaner | Fresh water |
|---|
| Nozzle tip size (inch/1000): | 19-23 |
| Nozzle pressure (minimum): | 200 bar/2900 psi |
| Substrate Temperature | 10 °C | 23 °C | 40 °C |
| Touch Dry | 4 h | 2 h | 1 h |
| Handle dry | 16 h | 6 h | 4 h |
| Minimum recoat interval | 16 h | 6 h | 4 h |
For the maximum recoat interval, refer to the Application Guide (AG) for this product.
The minimum drying recoat interval is for self-recoating. See the additional guidance for the finish coat.
All drying times are measured at 1000 µm wet film, under controlled temperature and relative humidity below 80%.
The minimum application temperature for this product is 5 °C. For good application and drying, the steel and air temperatures should be above 10 °C.
Topcoat
The minimum overcoating interval before applying a compatible topcoat is 24 hours. The coating system shall be dry to handle and a thickness gauge shall not leave a depression on the coating surface. With a sharp temperature drop or multi-coat application, drying times and overcoating intervals may be extended. Before applying the topcoat, ensure the specified dry film thickness has been achieved.
| Touch Dry | The state at which light finger pressure leaves no mark or stickiness. |
|---|---|
| Handle dry | The minimum time after application before handling will not damage the film. |
Minimum recoat interval after drying: the recommended minimum interval before applying the next coat.
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.
| Previous coat: | Alkyd, epoxy, epoxy zinc phosphate, zinc epoxy (with epoxy tie coat) |
| Subsequent coat: | Approved topcoat list |
The matching primer and topcoat must be compatible with the fire protection coating to ensure its fire protection performance. SteelMaster 1200WF Interior Intumescent Fire Protection Coating for Structural Steel (0Q8).
Contact your local JOTUN office for the approved primer and topcoat list.
| Volume | Container Size | |
| (L) | ||
| SteelMaster 1200WF Interior Intumescent Fire Protection Coating for Structural Steel (0Q8) | 18.5 | 20 |
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.
Temperature must be between 5 °C and 25 °C; if exceeded, temperature conditioning is recommended. In addition, climate control is recommended. Avoid frost during transport and storage.
SteelMaster 1200WF 6 months. Interior Intumescent Fire Protection Coating for Structural Steel (0Q8)
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
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.
