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JOTUN STEELMASTER 60/120

 
 

 

 

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