PPG STEELGUARD 851 Exterior Ultra-thin Intumescent Fire Protection Coating for Steel Structures 851 is a fire protection coating. One-component solvent-borne ultra-thin film intumescent fire protection coating for steel structures. Exterior-type fire protection coating suitable for exterior surfaces in C1 to C4 corrosive environments as defined by international standard ISO 12944, and also suitable for interior use. Parameters on this page: volume solids 75 ± 3%, dry film thickness 200–1000 µm (8.0–40.0 mil) per coat, theoretical spreading rate 1.07 m²/L.
Parameter source: PPG original technical data sheet (TDS) PPG STEELGUARD 851 Exterior Ultra-thin Intumescent Fire Protection Coating for Steel Structures 851; 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 | 75 ± 3% |
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| Dry Film Thickness | 200–1000 µm (8.0–40.0 mils) per coat |
| Theoretical Spreading Rate | 1.07 m²/L |
| VOC | Maximum 255.0 g/kg (EU Directive 1999/13… |
| Density / Specific Gravity | 1.35 kg/L (11.27 lb/US gal) (dry film density after spraying) |
| Number of Components | One-component |
| Thinner | Thinner 21-06 (normally no thinning required) |
| Recoat Interval | Minimum time: 4 h |
A single-component solvent-borne intumescent fire protection coating for structural steel with ultra-thin film build.
interior dry surfaces generally do not require a topcoat.
With a compatible topcoat for protection, the fire protection coating can also withstand weathering on its own for 12 months.
| Number of Components | One-component |
| Density | 1.35 kg/L (11.27 lb/US gal) (dry film density after spraying). |
| Volume solids | 75 ± 3% . |
| VOC (as supplied) | Maximum 255.0 g/kg (EU Directive 1999/13/EC, SED). |
UK standard UK PG 6/23(92) Appendix 3: maximum 327.0 g/L (approx. 2.7 lb/US gal).
EU standard EUR Directive: 2004/42/IIA(i)(500) 369 g/L)
| Recommended dry film thickness | 200–1000 µm (8.0–40.0 mil) per coat. |
| Theoretical Spreading Rate | 1.07 m²/L at 700 µm (43 ft²/US gal at 28.0 mil). |
| Touch Dry | 20 min. |
| Recoat Interval | Minimum time: 4 h. |
Maximum time: unlimited.
| Storage shelf life | At least 18 months, provided it is stored in a cool, dry environment. |
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| Recommended thinner | Thinner 21-06 (thinning generally not required). |
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| Thinner quantity | 0 - 5% . |
20–50°, depending on the shape of each area.
| Nozzle tip size | Approx. 0.48–0.64 mm (0.019–0.025 in). |
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| Nozzle pressure | 20.0 MPa (approx. 200 atm; 2901 psi). |
| Recommended thinner | Thinning is not recommended. |
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| Cleaning solvent | Thinner 21-06. |
| Dry Film Thickness | Theoretical Spreading Rate |
| 200 µm (8.0 mils) | 3.75 m²/L (150 ft²/US gal) |
| 400 µm (16.0 mils) | 1.88 m²/L (75 ft²/US gal) |
| 500 µm (20.0 mils) | 1.50 m²/L (60 ft²/US gal) |
| 700 µm (28.0 mils) | 1.07 m²/L (43 ft²/US gal) |
| 1000 µm (40.0 mils) | 0.75 m²/L (30 ft²/US gal) |
| Notes | Maximum dry film thickness for brush application: 300 µm (12.0 mils). |
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| Subsequent coat for recoating | Recoat interval | 5 °C | 10 °C | 15 °C | 20 °C | 30 °C |
| (41 °F) | (50 °F) | (59 °F) | (68 °F) | (86 °F) | ||
| Self-recoat | Minimum recoat interval | 10 h | 8 h | 6 h | 4 h | 3 h |
| Maximum recoat interval | Unlimited | |||||
Recoat interval table for a coating at 1000 µm (40.0 mils) dry film thickness
| Subsequent coat for recoating | Recoat interval | 5 °C | 10 °C | 15 °C | 20 °C | 30 °C |
| (41 °F) | (50 °F) | (59 °F) | (68 °F) | (86 °F) | ||
| STEELGUARD 2458 | Minimum recoat interval | 2 h | 1.5 h | 1 h | 30 min | 20 min |
| Maximum recoat interval | Unlimited | |||||
| Recoat with other compatible | Minimum recoat interval | 3 days | 60 h | 48 h | 24 h | 16 h |
| Compatible topcoat | Maximum recoat interval | Unlimited | ||||
| Substrate Temperature | Touch dry (surface dry) |
| 5 °C (41 °F) | 1 h |
| 10 °C (50 °F) | 45 min |
| 15 °C (59 °F) | 30 min |
| 20 °C (68 °F) | 20 min |
| 30 °C (86 °F) | 10 min |
| Notes | Coating drying times may vary with ambient conditions, the section factor A/V m⁻¹ (Hp/A) of the member and the actual film thickness. |
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If the buyer fails to notify PPG of the defect as required above, this will prejudice the buyer's right to obtain compensation under this warranty from PPG!
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The information in this product data sheet is based on laboratory tests we believe to be reliable, and is provided for guidance only. PPG may revise this information at any time as experience accumulates and product development progresses.
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