COMPARTMENTING AND FIRE PROOFING SEALINGS
SOLVENT-BASED INTUMESCENT PAINTS FOR THE FIRE PROTECTION OF STEEL STRUCTURES
KM I-CHAR 22
KM I-CHAR 22 is used for the fire protection of steel structures, concrete, reinforced concrete, compartmentation masonries in brick or concrete and in other fields of application.
It guarantees a class of fire resistance up to 2 hours.
KM I-CHAR 22 is an high performances solvent-based intumescent paint. The active solids, the strength of the intumescent foam with excellent working capacity guarantee an efficient fire barrier.
The fast development of a stable carbon foam with low coefficient of heat transmission guarantees an efficient protection of the flammable and inflammable substrates.
The solvent-based KM I-CHAR 22 guarantees many advantages of application in difficult environmental conditions, low temperatures, high humidity and resistance against rain.
(Intumescence is the “swelling during carbonization”).
Special chemical compounds react with temperature exceeding 200°C, forming a low density foam of volume up to 100 times the original mixture. This foam guarantees an efficient barrier against the heat transmission, protecting the substrate.
The fire resistance of the structures are very important for the security in case of blaze. In case of fire in buildings, factories, hotels, airports, malls, schools, hospitals, cinema, theaters, multilevel carparks etc., the intumescent paints increase the strength of the structures, and they allow to save lives, preserving the structure, to allow the carrying of the occupants and the working of firemen.
USE AND APPLICATION
An adequate preparation (cleaning, degreasing and removal of fine particles) is necessary.
The steel surfaces are normally sandblasted (SA21 ½), before applying an anticorrosive primer.
Two hands of paints are at least to apply by airless systems, by crossing wet-on-wet.
A typical application of 1,5 mm (dry product)=2,7 kg/ m2 (wet product) is made by two hands with a wet layer 1 mm thick.
A right equipment is an airless piston pump, minimum compression ratio =40:1, minimum pression 150 bar (for example GRACO MARK V or WAGNER ProSpray PS34), self-cleaning nozzle Reverse-A-Clean, nozzle diameter 45-50 mils = 1 mm, flexible feed hose of 3/8“ and maximum 30 m long. In the normal spry applications, the medium volume flow changes between 3 and 6 l/min.
All filters of the equipment should be removed after every operating.
The application may be also done by brush or roller, with long single coats, without brushing. The brush/roller application will require more hands than the airless one.
During the application and the drying you will have to work under appropriate environmental conditions.
PRIMER AND RACCOMENDED FINISHES
KM I-PRIMER 036: Fast drying phenolic modification alchidic primer for steel and galvanized steel.
Different commercial primers are compatible. Our technical department may provide a list.
KM I-CHAR 22 is compatible with alchidic systems.
A better appearance and a less grip of dirt can be obtained by a finishing.
The intumescent paints can’t be used in the presence of condensation or rain, in wet environments and outdoor. Waterproof finishes are necessary.
Any finishing isn’t generally required indoor according ETAG 018, class Z1 and Z2. Our acryilic waterbased paint IDROSOL is used on semi-exposed environments according to ETAG 018, class Y. Our bicomponent polyurethanic solvent-based PURETHAN is used on outside and totally exposed according to ETAG 018, class X or ISO 12944, corrosion class C3. The application must be particularly careful.
Density: 1.35 ± 0,05 kg/dm3 at 20°C
Dry Residue: 80% ± 5%w/w - 73% ± 5%v/v
Packaging: bucket of 25 kg
Deadline: 12 months in original packaging and appropriate environment
Performance: 0,55 ± 0,05mm
Thickness of drying layer (DFT), 1kg/m2 wet (theoretical)
Application: normal by airless spray. On the little surfaces and retouching by brush or roller
Wet thickness of one hand: airless spray: max 1300 µm (750 µm DFT)
Brush and roller: max 500 µm (300 µm DFT)
Dilution: not recommended. With 5% water-solution, where necessary
Drying *: 4 h to the touch/ 24 h - complete
Min. Application Temperature: +0°C
Max. Application Temperature: +40°C
(*) @ +20°C at 60% UR. The drying time dipends on thickness, temperature, and relative moisture.
CERTIFICATIONS AND APPROVALS
KM I-CHAR 22 is certified according to European and other Standards .
The characteristics of fire protection for steel structures are certified according to EN 13381-4 and EN 13501-2. We have tests report of fire reaction according to EN13501-1 and other special applications.
The technical specifications have only an information value and the maximal results are guaranteed only after preliminary tests of application.