Fosroc Dekguard PU constructive solutions

Chemical and UV resistant protective coating system Dekguard PU is available in marine grade for applications
necessitating biocidal and micro-biostatic effect.

Uses
Specification
Provides a high grade protection system, to a variety of
The final, corrosion resistant coating shall be Dekguard
surfaces exposed to aggressive environments. Typical areas
PU, a polyurethane, protective coating. The coating shall
for application would include the following :
possess excellent chemical and UV resistance properties,
 Sewage works and effluent plants. with a Carbon Dioxide diffusion coefficient of not less than
1.0 x 10-7 cm2/s. It shall be compatible with concrete, steel
 Chemical processing.
and fully cured epoxies.
 Underwater, or submerged conditions.
Properties
 Wherever UV resistance is required.

 Jetties, piers, harbours, seawater intakes and channels. Specific gravity : 1.3 (mixed)
Solids by volume @ 25ºC : 52% (mixed)
 Pedestrian walkways, bridges and car parks.
Carbon-di-oxide diffusion : 1.0 x 10-7 cm2/s
 As an Anti-Graffiti coating @ 23ºC @ 35ºC
Pot life : 3 hours 1.30 hour
Advantages Drying time :
touch dry 4 hours 2 hours
 Low cost in service - due to combination of excellent
recoatable 4 hours 2 hours
UV and chemical resistance properties.
full cure 7 days 3 days
 Labour saving - can be applied directly onto fully cured
Chemical resistance :
epoxy coatings, without need for priming system.
Fully cured coatings were tested on some common chem-
 Versatile - can be applied to steel and concrete, allows
icals. Tests were performed by constant immersion over a
colour matching of different elements.
set period, followed by visual inspection.
 Superior surface finish achievable - allows use of
Acids (m/v)
powerful detergent cleaners where necessary.
Acetic acid 5% : Excellent
 Enhanced performance - two part material eliminates Citric acid 80% : Excellent
curing problems associated with single part alternatives. Tartaric acid 10% : Very good
Phosphoric acid 2 50% : Excellent
 Available in a range of colours - in gloss finish and
Oleic acid 1 : Excellent
matt finish, clear gloss and clear matt versions also avail-
able. Alkalis (m/v)
Ammonia 20% : Excellent
Description Sodium Hydroxide 1 24% : Very good
Hydrogen Peroxide 1 100% : Very good
Dekguard PU is a high quality, polyurethane, protective
coating which can be applied to a variety of surfaces includ- Solvents & organics
ing steel, concrete and fully cured epoxies. It is supplied as a Xylene : Excellent
two pack material in pre-weighed quantities ready for on-site Diethyl ether : Excellent
mixing and use. Ethanol : Excellent
Toluene 2 : Very good
Dekguard PU is applied to a dry surface, as a single coat of
between 95 and 145 microns wet film thickness, which will Aqueous solutions
cure to give a finished dry film thickness of between 50 and Bleach : Excellent
75 microns. Additional coats may be required for extreme Aqueous starch solution 5% : Excellent
exposure conditions. Milk : Excellent
Dekguard PU

(1) Note - acceptable performance up to 7 days immersion

(2) Note - can cause some slight surface discoloration
Fosroc Dekguard PU

Instructions for use and recommendations to suit particular site variations.

Dekguard PU can be applied on top of a number of different Mixing

substrates and surfaces; either directly, or by following an
The contents of the resin base tin should be thoroughly stirred
initial priming coat. The instructions which follow therefore
to disperse any possible settlement.
need to be read carefully to ensure that the correct procedure
is adopted in each case. The entire contents of the hardener should be poured into the
base container, and the two materials mixed thoroughly until
Surface preparation
both uniform colour and consistency are obtained.
All surfaces to be treated with Dekguard PU should be clean,
It is recommended that the two components are mixed
dry and free from dust or other loose material.
together mechanically; using a slow speed, electric drill, with
Concrete surfaces a proprietary mixing paddle attachment. Mixing should be
carried out continuously for 3 to 5 minutes. If aerated, allow to
All surface laitance should be removed by grit blasting or wa-
stand for 10 to 15 minutes before application.
ter jetting, to provide a suitable key. The general standard of
surface preparation should be in accordance with ACI 503R-89, Important note :
Chapter 5, Paragraph 5.4.
Dekguard PU is a solvent-based product, and should be
Following the preparation of a concrete surface, care should mixed in an open, well-ventilated area. If subsequent appli-
be taken to ensure that any surface irregularities are filled with cation is to be in a confined or poorly ventilated space, then
the appropriate Nitomortar* product. air-fed respirators must be worn.

Metal surfaces Application

Any metal surfaces should be blasted to a bright finish, meet- Hand application
ing the requirements of Swedish Standard SA 2½ or equal.
This can be suitably achieved by brush or roller.
Some types of ferrous metals, due to their tendency to flash
The primer (if used) should be firmly applied and scrubbed
rust, should be protected with Nitoprime 25 anti-corrosion
well into the surface, ensuring that a continuous film results of
primer before proceeding with subsequent application of
uniform thickness.
Dekguard EP302 as stated in the priming section.
The Dekguard PU topcoat will cover very readily. In the case
Fully cured epoxies
of application over Dekguard EP302 primer, the ‘undercoat’
Please contact your local Fosroc office for details on surface should be fully dry before application. In the case of existing
preparation required for existing epoxy coatings. epoxy coatings, the ‘undercoat’ should be fully cured.

Priming It is further recommended that a contrasting colour is chosen

for the second coat, to ensure unbroken coverage.
Priming of any substrate should only be completed using
Dekguard EP302*, and is required for applications to metal or Spray application
concrete. In certain instances, it is possible to apply Dekguard
Faster rates of application are possible using airless spray
PU directly on top of prepared, existing substrates - contact
equipment, but the local Fosroc office should be contacted
the local Fosroc office for details.
prior to application for technical advice.
Dekguard EP302 is a two part priming system, and should be
Cleaning
mixed and applied in the same fashion as for the Dekguard
PU topcoat - see “Mixing” and “Application” sections below. Tools and equipment should be cleaned with Fosroc Solvent
It may be applied at a wet film thickness of between 125 and 102* immediately after use.
190 microns, curing to a dry film thickness of 50 to 75 mi-
Repairing and overcoating
crons.
Any applications of Dekguard PU which have become dam-
Most importantly, however, the priming coat should be com-
aged can be readily overcoated.
pletely dry before applying any of the Dekguard PU topcoat.
The time for this to occur is typically 4 hours at 20ºC, and 2 The existing surface should be well abraded, using a stiff wire
hours at 35ºC - consult the local Fosroc office for full details brush, or similar, to ensure that a good mechanical bond will
be achieved between the two layers.

Dekguard PU - Page 2 of 4
Fosroc Dekguard PU

Overcoating works can then proceed as for new work. Some people are sensitive to resins, hardeners and solvents.
Wear suitable protective clothing, gloves and eye/face protec-
Estimating tion. Barrier creams such as Kerodex Antisolvent or Rozalex
Antipaint provide additional skin protection.
Supply
Dekguard PU : 20 litre packs Should accidental skin contact occur, remove immediately
Dekguard EP302 : 20 litre packs with a resin removing cream such as Kerocleanse Standard
Fosroc Solvent 102 : 5 litre packs Grade Skin Cleanser or Rozaklens Industrial Skin Cleans-
er, followed by washing with soap and water - do not use
Coverage solvent.

The coverage figures quoted are theoretical, and based upon In case of contact with eyes, rinse immediately with plenty of
application to a properly prepared substrate. water and seek medical advice.

Since application conditions vary greatly; due to substrate If swallowed seek medical attention immediately - do not
porosity, quality of surface preparation, application thickness induce vomiting.
and wastage factors, the on-site figures may vary from those
For further information, please consult the Material Safety
shown below.
Data Sheet for Dekguard PU.
Dekguard PU : 7 to 10 m2/litre
Fire
Dekguard EP302 : 5 to 8 m2/litre
Dekguard EP302 and Nitomortar FC are non-flammable.
Technical support
Fosroc Solvent 102 is flammable. Do not use near a naked
Fosroc offers a comprehensive technical support service to flame.
specifiers, end users and contractors. It is also able to offer on-
Flash points
site technical assistance, an AutoCAD facility and dedicated
Fosroc Solvent 102 : 33ºC
specification assistance in locations all over the world.

Storage
Limitations
Shelf life
A minimum application temperature of 5ºC should be observed
at all times. Dekguard PU and Dekguard EP302 have a shelf life of 12
months, when stored in warehouse conditions below 25ºC.
For applications in confined, or poorly ventilated, spaces the
Avoid storage of material under direct sunlight.
use of respirators is mandatory.

For anti-graffiti performance, use only the gloss version of

Dekguard PU. Note:

Dekguard PU was formerly known as Nitocote Graffitiguard

Precautions

Health and safety

Dekguard PU, Dekguard EP302 and Fosroc Solvent 102

should not come in contact with skin or eyes, nor should they
be swallowed.

Avoid inhalation of vapours and ensure adequate ventilation,

in particular for Dekguard PU which is a solvent and isocy-
anate-containing product. Air-fed respirators must be worn if
the application is in a confined, or poorly ventilated, space.

Dekguard PU - Page 3 of 4
Fosroc Dekguard PU

Additional Information

Fosroc manufactures a wide range of complementary prod-

ucts which include :

 waterproofing membranes & waterstops

 joint sealants & filler boards

 cementitious & epoxy grouts

 specialised flooring materials

Fosroc additionally offers a comprehensive package of prod-

ucts specifically designed for the repair and refurbishment
of damaged concrete. Fosroc’s ‘Systematic Approach’ to
concrete repair features the following :

 hand-placed repair mortars

 spray grade repair mortars

 fluid micro-concretes

 chemically resistant epoxy mortars

 anti-carbonation/anti-chloride protective coatings

 chemical and abrasion resistant coatings

For further information on any of the above, please consult

your local Fosroc office - as below.

* Denotes the trademark of Fosroc International Limited

†
See separate data sheet

Important note
Fosroc products are guaranteed against defective materials and manufacture and are sold subject to its standard Conditions for the Supply of
Goods and Service. All Fosroc datasheets are updated on a regular basis. It is the user’s responsibility to obtain the latest version.

Head Office
telephone: (+9714) 2039699 fax: (+9714) 2859649 email: agf@fosroc.com
Al Gurg Fosroc LLC
Regional offices
Post Box 657, Dubai Abu Dhabi, Al Gurg Fosroc telephone: 673 1779 fax: 673 1449 email: abudhabi@fosroc.com
Bahrain, YBA Kanoo telephone: 17738200 fax: 17732828 email: bahrain@fosroc.com
United Arab Emirates Kuwait, Boodai telephone: 4817618 fax: 4832124 email: kuwait@fosroc.com
Oman, Al Amana telephone: 24815080 fax: 24817554 email: oman@fosroc.com
www.fosroc.com Qatar, Tadmur telephone: 4432365 fax: 4419517 email: qatar@fosroc.com

UAE/0096/14/N