Waterborne intumescent emulsion coating for fire protection. Under fire it expands to a charred layer with thickness up to 100 times the initial one of the dry film.
APPLICATION FIELD
Fire protection of steel structures. Specific application conditions must be tested according to the relevant regulations.
DENSITY
1.35 ± 0,05 kg/dm3at 20 °C
STANDARD PACKING
20 Kg. drums
SHELF LIFE
12 months in original packing. Avoid temperatures higher than 40 °C or lower than 5 °C, direct exposure to sunlight and freezing
SPREADING RATE
0,6 mm dry film thickness with 1 kg/m2 wet paint (theoretical)
COLOUR
white
THINNING
Not recommended.
If necessary with water max. 5 %
APPLICATION
Normally by airless spray. For small surfaces or retouching by roller or brush
NOTE
The product should not be used outdoors, if not protected with appropriate topcoat. Sensitive to moisture.
IMPORTANT
Follow the instructions of technical and safety datasheets
PHYSICAL PROPERTIES
Drying time (at 20 °C and 60 % r.h.)
- 12 hours - touch - 24 hours - complete
Overcoating For details see “Char 21 drying” datasheet
- 12 hours with itself - through-dried with other products
Minimum application temperature
+ 5 °C
Maximum application temperature
+ 40 °C
Solid content
73 % w/w 65 % v/v
APPLICATION
Substrate preparation: manual or mechanical cleaning and removal of grease, dust or loose particles. Rusted metal surfaces must be abraded or sandblasted to remove all surface rust, and properly primed. Char 21 is compatible with most of the primers commercially available. Compatibility, however, must be verified for each specific case. Please contact our technical service. The product must be accurately mixed. Spray application in at least two crossed coats, with airless spray systems. Application by brush or roller for small parts, with long single strokes. Do not overwork. Apply second coat at 90° orientation to the first. Clean up of tools and equipment with water before product dries. Drying times are dependent on film thickness, ambient temperature, ambient moisture and conditions.
OUR RECOMMENDED PRIMERS
EPOSOL PRIMER 100: for steel, stainless steel, aluminium and non-ferrous metals HETERNOX: fast drying primer for steel and zinc coated steel PRIMER 036/E: alkyd primer for steel
DRY FILM THICKNESS
The thickness to be applied is a function of the protection required (R class), the type of steel profile and load (critical temperature). Dry film thickness vs. these parameters are report in the assessment reports according ENV 13381-4 “Test method for determining the contribution to the fire resistance of structural members – Part 4: applied protection to steel members” or in classification documents according EN 13501. Please contact our technical service for the proper documentation and assistance for dimensioning calculations.
Though based on the results of long term tests and experience the present information is given as a guide only as utilization and operating conditions are extremely variable. We cannot accept any liability for use of the product that must be verified by the user.Accurate preliminary testing is highly advisable to obtain the full advantage of this product. Call in our technical department for any further information you may need.
