SteelMaster 120SB Exterior Intumescent Fire Protection Coating for Steel Structures belongs to fire protection coatings. With an approved topcoat, suitable for internal or semi-exposed steel structures up to C4 (ISO 12944-2). Independently certified for fire protection of structural steel exposed to cellulosic fires. Parameters on this page: volume solids 72 ± 3%, dry film thickness 200–720 µm, number of components single-component. Comparable models from the same brand: Jotachar 1709 XT epoxy intumescent coating, Jotachar 1709 exterior intumescent fire protection coating for steel structures, Jotachar JF750 XT epoxy intumescent coating.
Parameter source: JOTUN original Technical Data Sheet (TDS) 'SteelMaster 120SB Exterior Intumescent Fire Protection Coating for Steel Structures'; values such as spreading rate 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 | 72 ± 3% |
|---|---|
| Dry Film Thickness | 200–720 µm |
| Theoretical Spreading Rate | — |
| VOC | 323 g/L |
| Density / Specific Gravity | 1.3 kg/L |
| Number of Components | One-component |
| Flash Point | 25 °C |
| Wet Film Thickness | 280–1000 µm |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Exterior Intumescent Fire Protection for Structural Steel (0S6)
This is a single-component solvent-borne thin-film intumescent acrylic coating. Independently certified for fire protection of structural steel exposed to cellulosic fires. Suitable as an intermediate or topcoat in atmospheric environments. Suitable for carbon steel substrates with an approved primer.
Specially designed as a reactive fire protection system for steel structures. With an approved topcoat, suitable for internal or semi-exposed steel structures up to C4 (ISO 12944-2).
SteelMaster 120SB adequately dried during the construction phase may be exposed for 6 months without a topcoat; regardless of whether a topcoat is applied, the fire protection coating shall be protected from condensation, standing or ponding water from rain or water spray, snow and freezing.
Contact your local JOTUN representative for the detailed application procedure document.
Others
BS 476 Part 20/21: Certifire CF 845 applicable to open web beams (RT1356)
Chinese GB14907:2018 ASTM E84: Class A. Other certificates and approvals are available on request.
White
| Property | Test / Standard | Description |
| Volume Solids | ISO 3233 | 72± 3 % |
| Flash Point | ISO 3679 Method 1 | 25 °C |
| Density | Theoretical Value | 1.3 kg/L |
| VOC — USA / Hong Kong | US EPA Method 24 (test value) (CARB (SCM) 2007, SCAQMD Rule 1113, Hong Kong) | 323 g/L |
| VOC — EU | IED (2010/75/EU) (theoretical value) | 351 g/L |
| VOC — China | GB/T 23985-2009 (tested) | 355 g/L |
The data listed are based on factory batch production and may vary slightly with colour.
Solids content measured according to ISO 3233 and the ASFP-BCF guidance method
Typical recommended specification range
| Dry Film Thickness | 200–720 µm |
| Wet Film Thickness | 280–1000 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. |
|---|
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
Do not add thinner. Not to be thinned; ready for use.
| Cleaner | JOTUN Thinner No. 7 |
|---|
When the thinner is used as a cleaning solvent, it must first comply with local regulatory requirements
| Nozzle tip size (inch/1000): | 19-23 |
| Nozzle pressure (minimum): | 200 bar/2900 psi |
| Substrate Temperature | 5 °C | 10 °C | 23 °C | 40 °C |
| Touch Dry | 2 h | 1 h | 30 min | 20 min |
| Handle dry | 48 h | 24 h | 16 h | 8 h |
| Minimum recoat interval | 24 h | 8 h | 6 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 a wet film thickness of 1000 µm, under controlled temperature and at a relative humidity below 85%.
Drying time may vary with changing ambient conditions, such as air temperature, relative humidity, climatic conditions, ventilation, number of coats and total dry film thickness applied. Refer to the application guide for application of multiple coats.
Topcoat
With an approved acrylic topcoat, the recommended minimum recoat interval for this product is 24 h; with other approved topcoats, 48 h. The system shall be dry to handle, and the dry film thickness gauge shall not leave marks on the coating surface. Where temperature falls or a multi-coat system is applied, drying time and recoat interval may be extended. Before applying the topcoat, applicators shall confirm 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 compatible primer and topcoat shall be compatible with the fire protection coating to ensure its fire performance:
SteelMaster 120SB Exterior Intumescent Fire Protection Coating for Steel Structures (0S6)
Contact your local JOTUN office for the approved primer and topcoat list.
| Volume | Container Size | |
| (L) | ||
| Exterior Intumescent Fire Protection for Structural Steel (0S6) | 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 in a dry, cool, well-ventilated place away from heat and sources of ignition. Keep containers tightly closed. Handle with care.
Exterior Intumescent Fire Protection Coating for Steel Structures (0S6) 18 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.
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.
