SteelMaster 90SB Exterior Intumescent Fire Protection Coating for Steel Structures belongs to fire protection coatings. SteelMaster 90SB may be exposed for 9 months during the construction phase without a topcoat, provided it has dried sufficiently and reached a reasonable hardness before exposure. Independently certified fire protection for structural steel exposed to cellulosic fires. Parameters on this page: volume solids 75 ± 4%, DFT 200-750 µm, number of components: one-component. Comparable models from the same brand: Jotachar 1709 XT Epoxy Intumescent Coating, Jotachar 1709 Exterior Intumescent Fire Protection Coating, Jotachar JF750 XT Epoxy Intumescent Coating.
Parameter source: original JOTUN technical data sheet (TDS) "SteelMaster 90SB Exterior Intumescent Fire Protection Coating for Steel Structures"; values such as spreading rate are converted from TDS parameters and serve as 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 | 75 ± 4% |
|---|---|
| Dry Film Thickness | 200-750 µm |
| Theoretical Spreading Rate | — |
| VOC | 346 g/L (China) |
| Density / Specific Gravity | 1.3 kg/L |
| Number of Components | One-component |
| Flash Point | 25 °C |
| Thinner | JOTUN Thinner No. 7 |
| Wet Film Thickness | 270-1000 µm |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
SteelMaster 90SB
This is a one-component solvent-borne thin-film intumescent acrylic fire protection coating. Independently certified fire protection for structural steel exposed to cellulosic fires. May be used as an intermediate or topcoat in atmospheric environments. Suitable for carbon steel substrates coated with an approved primer.
Specially designed as a reactive fire protection system for steel structures. Suitable for structural steel in corrosivity categories up to C4 (ISO 12944-2) when applied with an approved topcoat; for dry internal (C1) environments the topcoat is optional.
SteelMaster 90SB may be exposed for 9 months during the construction phase without a topcoat, provided it has dried sufficiently and reached a reasonable hardness before exposure.
However, with or without a topcoat, the coating shall be protected from standing water from rainfall, running water or severe condensation during application and in service. The same requirement applies to snow and ice. The topcoat shall be continuous, complete and free from defects.
Contact your local JOTUN representative for the detailed application procedure document.
Others
BS 476 part 20/21: Certifire CF 10246 (fire resistance up to 120 min)
Suitable for open beams (RT1356)
Tested and assessed according to EN 13381-8 and EN 13381-9 (fire resistance up to 120 minutes)
CE-marked product with European Technical Assessment ETA 24/0096 Australia AS 4100
| Fire Performance | Class C-s1, do(EN13501-1) |
|---|---|
| Durability and service suitability | Z2, Z1, Y and X (EAD 350402-00-1106) |
ASTM E84: Class A. Other certificates and approvals are available on request.
White
| Property | Test / Standard | Description |
| Volume Solids | ISO 3233 | 75± 4 % |
| Flash Point | ISO 3679 Method 1 | 25 °C |
| Density | Theoretical Value | 1.3 kg/L |
| Region | Regulations | Test / Standard | VOC Value |
| EU | European Paint Directive 2004/42/CE | Calculation | 345 g/L |
| China | Mandatory national standard of China | GB 30981.2-2025 | 346 g/L |
Coating hazards GB 30981.2-S-Pb≤1000-NC. 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 - 750 µm |
| Wet Film Thickness | 270 - 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 recommended coating thickness can be achieved in a single airless spray coat. Higher coating thicknesses require multiple coats. The maximum WFT that can be applied is 2000 µm, depending on steel structure configuration, geometry, primer type and environmental conditions. Typical WFT per coat is 1000 µm. Thicker coats may cause sagging, and the overcoating interval, drying and handleability time will also be extended. Refer to the application guide for further details. |
|---|
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/H beams, 3 faces: 3760 µm I/H beams, 4 faces: 3656 µm I/H columns, 4 faces: 3656 µm CHS & RHS columns, 4 faces 5591 µm RHS beams, 4 faces 2771 µm RHS beams, 3 faces 2771 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 | JOTUN Thinner No. 7 |
|---|
Product is ready for use.
Thinning may reduce the sag resistance of the coating and may extend its drying time.
| 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 depends on local environmental conditions such as air and substrate temperature, relative humidity, weather conditions and ventilation, as well as the number of coats and total DFT.
Drying time and overcoating intervals for recoating and topcoats may be extended by falling temperature, high humidity, poor ventilation or multiple coats. Determining the condition of the paint before recoating is good practice. SteelMaster coatings shall be dry and hard, which means no mark is easily left on the coating when pressed firmly with the thumb. Refer to the Application Guide (AG) for multi-coat application methods and further information. Refer to the application instructions for multi-coat application methods.
Topcoat
"The recommended minimum overcoating interval with an approved topcoat is 24 hours." For approved two-component topcoats, if the SteelMaster DFT
exceeds 2000 µm, or ambient temperature is expected to exceed 30°C, the recommended minimum overcoating interval is 48 hours.
Early overcoating with an approved acrylic topcoat is possible, e.g. for site application:
SteelMaster DFT;
• 750 µm, minimum 1 h at 23°C, minimum 2 h at 10°C.
• 1500 µm, minimum 2.5 h at 23°C, minimum 4 h at 10°C.
• 3000 µm, minimum 3 h at 23°C, minimum 8 h at 10°C.
Early overcoating with a topcoat may delay drying of the complete coating system.
In areas where the expected drying temperature exceeds 30°C and/or high humidity prevails, the recommended minimum interval before overcoating with an approved acrylic topcoat is 24 hours.
Before topcoat application, applicators shall ensure the specified DFT is achieved. The system shall be dry enough for handling, and the thickness gauge shall not leave an indentation on the coating when read.
| 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 90SB Exterior Intumescent Fire Protection Coating for Steel Structures: contact the local JOTUN office for the list of approved primers and topcoats.
| Volume | Container Size | |
| (L) | ||
| SteelMaster 90SB Exterior Intumescent Steel Fire Protection | 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.
SteelMaster 90SB 18 months Exterior Intumescent Fire Protection Coating for Steel Structures
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.
