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Material Description
CAFCO® 300 is a spray or trowel-applied, single package
factory controlled premix, based on vermiculite and gypsum, for internal use.
CAFCO® 300 is a lightweight coating that provides very
efficient fire resistance with minimal thickness to steel and concrete frames, metal floor and roof decks, return air plenums
and air handling ductwork.
Structures protected with CAFCO® 300 are provided with fire resistance up to 240 minutes.
Building types that benefit from the use of CAFCO® 300 include
a wide variety of educational, leisure and entertainment centres, and commercial projects.
Fire Protection Thickness
The thickness of the fire protection for a given period of fire resistance in a cellulosic type fire, relates to the Hp/A ratio
of the steel section. Hp/A is the ratio of the heated perimeter of the steel section exposed to fire to the cross-sectional area
of the same steel section.
All column and beam sections have their own specific Hp/A ratio. Please consult Promat to establish the Hp/A ratio for a particular
beam or column section. Tables 1, 2, 3 & 4 ascertain
the thickness of CAFCO® 300 that meets the required period of
fire resistance for I section beams and H section columns.
For advice on thickness calculations for hollow sections, cellular beams, castellated sections, composite floors, upgrading of
concrete slabs and more complex situations, please contact Promat.
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Table 1 |
CAFCO® 300 thicknesses for I section
beams (3-sided exposure). Critical temperature 550ºC, continuous concrete topping. (AS1530: Part 4) |
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Table 2 |
CAFCO® 300 thicknesses for H section columns (4-sided exposure).
Critical temperature 550ºC. (AS1530: Part 4) |
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Table 3 |
CAFCO® 300 thicknesses for I section
beams (3-sided exposure). Critical temperature 620ºC, continuous concrete topping. (BS476: Part 21: 1987) |
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Table 4 |
CAFCO® 300 thicknesses for H section
columns (4-sided exposure). Critical temperature 550ºC. (BS476: Part 21: 1987) |
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Typical Mechanical Properties
| Properties and
performance |
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Colour and finish |
Off white with a monolithic spray texture |
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Theoretical coverage |
217m²/tonne at 15mm thickness |
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Number of coats |
One or more as required |
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Cure |
By hydraulic set |
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Initial set |
10 to 15 hours at 20°C and 50% RH without accelarator |
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Density |
310kg/m³ ± 15% without accelerator, approximately 10% less with accelerator in accordance with ASTM E605. |
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Bond impact |
No cracks or delaminations in accordance with ASTM E760 |
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Air erosion resistance |
No erosion in accordance with ASTM E859 |
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Compressive strength |
1.22kg/cm² in accordance with ASTM E761 |
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Deflection effect |
No spalling, delamination or cracking in accordance with ASTM E759. |
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Flame spread |
Class 0 as defined by Building Regulations |
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Thermal conductivity |
0.078W/mK |
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Corrosion resistance |
Does not promote corrosion of steel and does not require application over primed steel.
Please seek structural engineer’s advice concerning long term corrosion protection. |
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pH value |
8.0 - 8.5 |
| Fire resistance |
Structures protected with CAFCO® 300 have undergone
fire resistance tests up to 240 minutes in approved independent laboratories to recognised standards throughout the
world, including:
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Australia (AS1530: Part 4) |
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UK (BS476: Parts 6, 7 and 21) |
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USA (ASTM E119) |
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France (August 1999 Ministry Decree) |
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Belgium (NBN S21-202) |
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Germany (DIN 4102: 1977-09 and DIN EN 1363-1:1999-10) |
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Harmonised European Standard ENV 13381: Part 4 |
The fire resistance test results relate solely to constructions tested and test conditions imposed.
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For further details, please refer to separate publication CAFCO® 300 Application Guide or consult nearest Promat office for details relevant to local conditions.
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| Typical substrates |
Unprimed and primed steel, concrete structural frames, return air plenums and air handling ductwork. |
| Substrate preparation |
The substrate shall be clean, dry and free from dust, loose mill scale, loose rust, oil and any other condition preventing good
adhesion. Application to unprimed steel is acceptable.
Where non compatible primers are used, steelwork and concrete substrates should be covered with
CAFCO® SBR bonding latex or Cafco
BONDSEA® keycoat, prior to the application of
CAFCO® 300.
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| Initial steps |
Application of CAFCO® 300 must be carried out by an
applicator recognised by Promat. |
| Methods |
Mix CAFCO® 300 with potable water in a suitable mixer
and apply by a spraying machine approved by Promat.
CAFCO® 300 may also be float finished using conventional
hand tools or spray textured. |
| Limitations |
CAFCO® 300 may be applied when the substrate and air
temperatures are at least 4ºC and rising, and must be maintained for 24 hours before, during and 24 hours after application.
Maximum substrate and air temperature is 45ºC. Substrate temperature should be at least 2ºC above dew point temperature. |
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Packaging |
20kg bags. |
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Storage |
Protect from frost, excessive heat (above 45ºC) and strong radiant sunlight. |
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Shelf life |
Maximum 12 months. |
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Environmental |
Do not discharge into drains, watercourses or soil. |
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Download full product description in PDF file. |
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