Dekguard PU Chemical and UV resistant protective coating system Ethiopia

Advantages
! Low cost in service – due to combination of excellent UV
and chemical resistance properties.
! Labour saving – can be applied directly onto fully cured
epoxy coatings, without need for priming system.
! Versatile – can be applied to steel and concrete, allows
colour matching of different elements.
! Superior surface finish achievable – allows use of
powerful detergent cleaners where necessary.
! Enhanced performance – two part material eliminates
curing problems associated with single part alternatives.
! Available in a range of colours – in gloss finish and matt
finish, clear gloss and clear matt versions also available.
Description
Dekguard PU is a high quality, polyurethane, protective coating
which can be applied to a variety of surfaces including steel,
concrete and fully cured epoxies. It is supplied as a two pack
material in pre-weighed quantities ready for on-site mixing
and use.
Dekguard PU is applied to a dry surface, as a single coat of
between 95 and 145 microns wet film thickness, which will
cure to give a finished dry film thickness of between 50 and
75 microns. Additional coats may be required for extreme
exposure conditions.
Dekguard PU is available in marine grade for applications
necessitating biocidal and micro-biostatic effect.
Specification
The final, corrosion resistant coating shall be Dekguard PU,
a polyurethane, protective coating. The coating shall possess
excellent chemical and UV resistance properties, with a
Carbon Dioxide diffusion coefficient of not less than
1.0 x 10-7 cm2
/s. It shall be compatible with concrete, steel
and fully cured epoxies.
Properties
Specific gravity : 1.3 (mixed)
Solids by volume @ 25?C : 52% (mixed)
Carbon-di-oxide diffusion : 1.0 x 10-7 cm2/s
@ 23?C @ 35?C
Pot life : 3 hours 1.30 hour
Drying time :
touch dry 4 hours 2 hours
recoatable 4 hours 2 hours
full cure 7 days 3 days
Chemical resistance :
Fully cured coatings were tested on some common
chemicals. Estimating
Supply
Dekguard PU : 20 litre packs
Dekguard EP302 : 20 litre packs
Fosroc Solvent 102 : 5 litre packs
Coverage
The coverage figures quoted are theoretical, and based upon
application to a properly prepared substrate.
Since application conditions vary greatly; due to substrate
porosity, quality of surface preparation, application thickness
and wastage factors, the on-site figures may vary from those
shown below.
Dekguard PU : 7 to 10 m2
/litre
Dekguard EP302 : 5 to 8 m2
/litre
Technical support
Fosroc offers a comprehensive technical support service to
specifiers, end users and contractors. It is also able to offer onsite technical assistance, an AutoCAD facility and dedicated
specification assistance in locations all over the world.
Limitations
A minimum application temperature of 5?C should be observed
at all times.
For applications in confined, or poorly ventilated, spaces the
use of respirators is mandatoryTests were performed by constant immersion
over a set period, followed by visual inspection.
Acids (m/v)
Acetic acid 5% : Excellent
Citric acid 80% : Excellent
Tartaric acid 10% : Very good
Phosphoric acid 2 50% : Excellent
Oleic acid 1 : Excellent
Alkalis (m/v)
Ammonia 20% : Excellent
Sodium Hydroxide 1
24% : Very good
Hydrogen Peroxide 1 100% : Very good
Solvents & organics
Xylene : Excellent
Diethyl ether : Excellent
Ethanol : Excellent
Toluene 2 : Very good
Aqueous solutions
Bleach : Excellent
Aqueous starch solution 5% : Excellent
Milk : Excellent
(1) Note – acceptable performance up to 7 days immersion
(2) Note – can cause some slight surface discoloration
Consult the local Fosroc office for specific recommendations
to meet varying operating conditions.