What is CHAR17 (timber)
CHAR 17 is a waterborne intumescent clear coating, providing
a very effective fire barrier with fast activation at low temperature. When
activated by a fire, the thin transparent film develops a coherent char
particularly suitable for fire protection of flammable substrates. CHAR 17 is
used for fire protection of wood and other flammable substrates, while
preserving their natural appearance.
CHAR17 achieves Euroclass B-s1-d0 on wood-based substrates of 10mm or more.
Application
CHAR17 is designed for fire protection of wooden structures
and panels in interior environments and which are not subjected to strong wear
and tear, e.g. beams and columns, boards, studs and joists, decorative panels
or walls.
Prepare surface for intumescent by removing existing
coatings. Oiled or waxed timber is to be spot-checked prior to application to
ensure full adhesion and clarity of final product. Oil/wax must be fully dry in
accordance with manufacturer instructions to prevent
CHAR 17 base is applied in two coats of 125ml per 1m2.
Each 1L tin will protect 4m2 of timber. Best results are achieved
with a fine or small pile roller. Care is to be taken when applying by brush to
ensure even application.
CHAR 17 is not to be applied externally or in areas of high
humidity.
Wood moisture should be lower than 15% to avoid the risk of
formation of white spots. Drying times are strongly dependent on film
thickness, ambient temperature and especially ambient moisture.
Temperature should be within 15°C and 35°C, relative
humidity should not exceed 70%. Coated surfaces should not be handled by bare
hands until fully dried, then top coated to avoid fingerprints.
Topcoat
CHAR 17 must be protected with CHAR 17 Finish on the same
day as initial application. Any delay to topcoat application will risk humidity
affecting the final finish. For best results apply with a fine or short pile
roller at 50ml per 1m2 or 20m2 per Litre.
Certification
CHAR 17 is achieves a reaction to fire rating; Euroclass B-s1-d0.
Available certificates and test reports are in accordance with
European fire standards. Reaction to fire test according to EN 13501-1.
Classification tests are performed according to EN ISO 11925-2 and EN 13823 on
wood particleboard rated according to EN 312-2.
Test report
Therefore, according to EN 13823 paragraph 5.2 results apply
to all types of wood and wood-based substrates and also on all flammable
substrates rated A2 or better. This performance is achieved with 300 g/m2
active layer. A number of recent cone calorimeter tests have shown excellent
fireproofing performance of several polymers including HIPS, unsaturated
polyesters, epoxies and others.
Properties of CHAR 17
CHAR 17 DENSITY: 1.30 ± 0,05 kg/dm3 at 20°C
SOLIDS CONTENT: 60% ±5%w/w – 75% ±5%v/v
COLOUR: Transparent
STANDARD PACKING: 1L,5L,15L paint tins
SHELF LIFE: 12 months in original packing and proper environment
COATING SYSTEM: CHAR 17 is sensitive to moisture. Must be protected with own topcoat CHAR 17 FINISH. SPREADING RATE: 300g/m2 +50 g/m2 topcoat. (theoretical)
APPLICATION: By airless or airmix spray, by roller or brush. NUMBER OF COAT: Typical application: 2 coats x 150 g/m2 active layer + 1 coat topcoat.
THINNING: Not recommended If necessary with water max 5% for CHAR17; with synthetic thinner max 5% for CHAR17
FINISH DRYING TIME * 8 hours – touch / 24 hours – complete
MIN APPL.TEMPERATURE +15°C RH max 60%
MAX APPL.TEMPERATURE +35°C RH max 70% (*) @ +20°C and 60% RH.
DRYING TIME depends on DFT, temperature and especially RH.
TEST, ASSESSMENT AND
CLASSIFICATION REPORTS INCLUDE:
I7720DC0030/11.1 LAPI
7720DC0040/11.1 LAPI
7720DC0050/11.1 LAPI
FMB-82/2005 GTC
PR-01-02-093 PAVUS
90ST07 PROPLAST
T.A.C.1026 SWEDCERT
MOI 2065 004 2013 NRC Cairo LAPI S.p.A. is Notified Body N°0987