Technical Data
Steelmaster - 60/120 Intumescent
Super Durable and Internal Grades
Steelmaster 60/120
Steelmaster 60/120 is an advanced technology thin film intumescent coating for the fire protection of structural steel to provide fire resistance for periods of 30 minutes to 120 minutes.
Steelmaster 60/120 is available in both internal and super durable grades, the latter providing outstanding resistance where arduous or external environments are encountered (refer to the section on “life expectancy”).
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Product features
- Fully EPA Compliant
- Complements CDM regulations
- Up to 1.4mm DFT per coat (by spray)
- Manufactured to BS EN ISO 9001:2000
- No sealer coat for C1 and C2 environments (refer to the section on “life expectancy”)
- Tested to BS 476 Part 21
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Super durable grade
- Outstanding water resistance / Excellent durability
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General information
| Storage Temperature: |
Minimum 5° C. Maximum 40° C |
| Shelf Life: |
12 months in sealed containers (at 20° C) |
| Pack Size: |
20 litre and 200 litres |
| Pot Life: |
Indefinite (single pack) |
| Colour: |
White |
| Drying: |
Air-dry or force dry |
Appearance when dry: |
Low sheen |
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Technical information
| Flash Point: |
25° C ± 2 °C (Setaflash) |
| Specific Gravity: |
Approx. 1.28 Kg/Litre |
| Volume Solids: |
68% ± 3% |
| VOC: |
335 grams/litre |
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Loading requirement
In order to establish the dry film thickness (DFT) required for the specified period of fire resistance, it is
necessary to first calculate the Hp/A value (also known as section factor , massivity and A/V values). The DFT
can then be calculated from the cur rent Steelmaster 60/120 loading tables.
| DFT (microns) |
500 |
1000 |
1500 |
2000 |
2500 |
3000 |
3500 |
| WFT (microns) |
735 |
1471 |
2206 |
2941 |
3676 |
4412 |
5147 |
| Theoretical Coverage (m2/litre) |
1.36 |
0.68 |
0.45 |
0.34 |
0.27 |
0.23 |
0.19 |
DFT = Dry Film Thickness WFT = Wet Film Thickness
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Application
In specialist units, approved by Jotun, Steelmaster 60/120 Super Durable Grade can be applied direct to steel
without primer. In all other cases, the use of Jotun primers is recommended (see below - refer also to the
Steelmaster 60/120 Application Procedural Manual).
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Primers
When applied over other manufacturers primers, compatibility should be checked. Consult Jotun’s
Technical Department for recommendations. Compatible primer should be applied and over coated in
accordance with the manufacturers instructions. For optimum results, mean thickness of the primer should
not exceed 150 microns.
Suitable Jotun primers include Penguard Primer, Penguard Special and Pilot Industry Primer.
Certain types of primers must be avoided as they could cause adhesion problems. These include
thermoplastic materials such as Chlorinated Rubber and bituminous primers. Certain “mastic” products and
primer / finish products may also prove to be unsuitable for a number of reasons including short
overcoating times.
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Surface preparation
Prior to application of a compatible primer, the substrate must be abrasive blast cleaned in accordance
with standard ISO 8501-1:1988. Cleanliness Sa 2.5. Roughness 50 to 85 microns Ry5. Coating should occur
before degradation of the surface takes place (normally within 4 hours). If oxidation take place, the steel
must be re-prepared. The surface must be dry and free of dust, salts, grease and any other contaminants
immediately before coating.
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Site conditions during steelmaster application
The steelwork should be protected from rain or condensation during the application and initial drying
stages of Steelmaster 60/120. The sur face must be dry and free of dust, salts, grease and any other
contaminants immediately before coating.
| Thinning/Cleaner: |
Thinning is not normally required. Clean equipment with Jotun thinner number 7. |
| Surface Temperature: |
Minimum 5 °C maximum 35 °C. The temperature of the substrate must also be at |
| |
least 3 °C above the dew-point |
| Relative Humidity: |
Maximum 85% |
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Application methods
| Mixing: |
Stir thoroughly before use until product is homogeneous |
| Application: |
Normally applied by airless spray (brush/roller small areas only - see below) |
| Airless Spray |
Pump ratio: |
minimum 45:1 |
| Application: |
Pressure at tip: |
25 MPa (250kp/cm2 3600 psi) |
| |
Tip size: |
19-27 thou (0.48-0.68mm) |
| |
Tip angle: |
30° - 50° |
| |
Filters: |
30 mesh internal filter normally required |
| |
Hose diameter: |
(ID) 10mm |
| |
Hose length: |
Maximum 60 metres |
| Brush/Roller: |
For brush application, use a “laying on” technique to avoid heavy brush marking. |
| Application: |
The maximum DFT achievable is 400 microns per brush coat. For roller application, |
| |
a short piled roller will produce a light textured finish. The maximum DFT |
| |
achievable is 250 microns per roller coat |
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Multi-coat spray application guidance
Steelmaster 60/120 can be applied at up to 1.4mm DFT achievable* (2.06mm WFT) in a single spray coat.
One method of achieving higher builds is detailed below:
| Required |
No. of |
1st Coat* |
2nd Coat |
3rd Coat |
4th Coat |
| DFT/WFT |
Coats |
|
|
|
|
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| 1.40mm dry |
1 |
1.40mm dry* |
None |
None |
None |
| 2.06mm wet |
|
2.06mm wet |
|
|
|
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| 1.41-2.20mm dry |
2 |
1.40mm dry* |
up to 0.8mm dry |
None |
None |
| 2.07-3.33mm wet |
|
2.06mm wet |
1.18mm wet |
|
|
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| 2.21-3.00mm dry |
3 |
1.40mm dry* |
0.8mm dry |
up to 0.8mm dry |
None |
| 3.24-4.40mm wet |
|
2.06mm wet |
1.18mm wet |
1.18mm wet |
|
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| 3.01-3.80mm dry |
4 |
1.40mm dry* |
0.8mm dry |
0.8mm dry |
up to 0.8mm dry |
| 4.43-6.47mm wet |
|
2.06mm wet |
1.18mm wet |
1.18mm wet |
1.18mm wet |
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Note: 0.8mm dry = 1.18mm wet. Where two (or more) coats are required, allow a minimum air-drying
period of 4 hours at 20 C between coats.
*actual film thickness achievable on first coat will depend upon a number of factors including ambient conditions
(air temperature, humidity, air-movement, steel temperature, spray tip size and angle, steel section size etc).
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Wet film thickness determinations
Wet film readings should be taken regularly during application, using a clean accurate aluminium or metal
wet film thickness comb. The readings should be regarded as a guide only to enable the applicator to
establish a technique for achievement of the required dry film thickness specification. During multi-coat
operations, wet film readings will prove unreliable when applying subsequent coats of Steelmaster 60/120.
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Drying
Drying times will vary considerably depending upon ambient conditions, method of application, air
movement, ventilation, etc. As a guide, a dry film thickness of 700 microns will be touch dry in
approximately 2 hours and hard dry in approximately 48 hours.
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Water-resistance
Steelmaster 60/120 Super Durable can be left externally without a Topsealer for up to 6 months.
Steelmaster 60/120 Internal SHOULD NOT be left externally without a Topsealer.
During this period of exposure, however, Steelmaster 60/120 Super Durable grade must be protected from
pooling water, hot humid environments or immersed conditions.
Prior to placing steelwork coated with Steelmaster 60/120 Super Durable (without Topsealer) in an external
environment, it should be allowed to dry internally (or in a watertight environment) as follows:
| Intumescent DFT (mm) |
Interior Drying |
Interior Drying |
| |
Period at 20° C |
Period at 10°C |
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| Up to 1.00 |
12 hours minimum |
24 hours minimum |
| 1.01-1.40 |
16 hours minimum |
32 hours minimum |
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| 1.41-2.20 |
20 hours minimum |
40 hours minimum |
| 2.21-3.00 |
24 hours minimum |
48 hours minimum |
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| Over 3.00 mm |
36 hours minimum |
72 hours minimum |
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Relates to the interior drying time after application of the final coat
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Dry film thickness determinations
Take dry film thickness readings (DFTs) as soon as the coating is sufficiently hard to allow readings without
indenting the surface.
All DFT specifications are mean values and the DFT of the primer must be deducted from the readings to
give the intumescent only dry film thickness. (The DFT of Topsealer must also be deducted when present).
Do not apply Topseal until all the readings are in accordance with the specified thickness.
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Topsealer
(PIONER)
Before applying Topsealer, the applicator must ensure that the specified intumescent DFT has been achieved.
Where a sealercoat is required - either for aesthetic reasons or to protect against atmospheric attack, then
PIONER TOPCOAT should be applied.
The minimum Dry Film Thickness (DFT) requirement will vary depending upon the end use (see table below).
75 microns of Top Sealer may be sufficient for some INTERNAL projects or where applied purely for cosmetic
reasons.
For exterior applications, Steelmaster 60/120 Super Durable must be applied, followed by Top Sealer at a
minimum DFT of 100 microns. Two coat application may be necessary.
A further coat of Pioner Topsealer is recommended after 10 years exposure to maintain the original aesthetic
appearance of the system.
Note: Jotun Pioner is available in an extensive colour range. However deep/dark (and black) colours should
be avoided if the completed steelwork is to be directly exposed to ultraviolet light (sunlight).
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Steelmaster 60/120 overcoating time (with Pioner):
| NTUMESCENT DFT (MM) |
MINIMUM OVERCOATING |
MINIMUMOVERCOATING |
| |
Time at 20 C |
Time at 10 |
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| Up to 1.00 |
4 hours minimum |
8 hours minimum |
| 1.01-1.40 |
6 hours minimum |
12 hours minimum |
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| 1.41-2.20 |
8 hours minimum |
16 hours minimum |
| 2.21-3.00 |
16 hours minimum |
32 hours minimum |
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| Over 3.00 mm |
24 hours minimum |
48 hours minimum |
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Life expectancy (Exposure conditions are defined in ISO 12944)
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| Exposure |
C1 |
C2 |
C3 |
C4 |
C5 |
| Conditions |
|
|
|
|
|
| (ISO 12944) |
|
|
|
|
|
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| Description |
Dry internal |
Internal semi- |
Internal damp |
Internal |
Most |
| |
controlled |
controlled dry |
semi- |
uncontrolled |
External |
| |
|
environments |
controlled |
frequently wet |
environments |
| |
|
subject to |
environment |
with |
|
| |
|
temperature |
|
condensation |
|
| |
|
fluctuation/ |
|
|
|
| |
|
no condensation |
|
|
|
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| Use |
Steelmaster |
Steelmaster |
Steelmaster |
Steelmaster |
Steelmaster |
| |
60/120 |
60/120 |
60/120 |
60/120 |
60/120 |
| |
Internal |
Internal |
Super Durable |
Super Durable |
Super Durable |
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| Life expectancy |
Life of |
Up to |
Up to |
Up to |
Up to |
| |
building |
20 years |
20 years |
20 years |
20 years |
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| Top Sealer |
None |
None |
75-100 |
100 |
100-125 |
| |
|
|
microns* |
microns* |
microns* |
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It should be noted that all areas of mechanical damage must be repaired properly before the onset of
localised breakdown.
* A further coat of Top Sealer is recommended after 10 years exposure to maintain the original aesthetic
appearance of the system.
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Health and safety
Please observe the precautionary notices displayed on the container. Apply under well-ventilated
conditions. Do not breath or inhale spray mist/vapours. Avoid skin contact. Spillage on the skin should
immediately be removed with suitable cleanser, soap and water. Eyes should be well flushed with water
and medical attention sought immediately.
For detailed information on the health and safety information with precautions for the use of this product,
please refer to the appropriate Material Safety Data Sheet.
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ISSUED 24 JANUARY 2005 BY JOTUN PAINTS
THIS DATA SHEET SUPERSEDES THOSE PREVIOUSLY ISSUED
DISCLAIMER
The information in this data sheet is given to the best of our knowledge based on laboratory testing and
practical experience. However, as the product is often under conditions beyond our control, we can not
guarantee anything but the quality of the product itself. We reserve the right to change the given data
without notice.
Jotun is a World Wide company with factories, sales offices and stocks in more than 50 countries.
DISTRIBUTOR: TayFire (International) Ltd
Station Road, Errol
Perthshire
PH2 7SL
Tel: +44 (0) 1821 641007
Fax: +44 (0) 1821 641008
E-mail: enquires@tayfire.co.uk
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