SpECbuild EM is designed to provide repairs to
surfaces subjected to mechanical and chemical
attack in areas such as, industrial floors,
warehouses, acid tanks, sewage lining and
sea walls. SpECbuild EM is also suitable as a
transition strip against mechanical joint systems.
· High mechanical strength.
· Early strength gain to minimize disruption.
· Resistant to aggressive chemicals.
· Highly impervious.
· Slip resistant.
· Waterproof.
· Non-toxic surface (after full cure).
SpECbuild EM may be applied horizontally in
layers of 50mm maximum and 5mm minimum.
In vertical situations where the use of formwork
is not possible, the maximum layer thickness is
10mm. SpECbuild EM is not recommended for
overhead application.
Preparation
It is essential that adequate surface preparation is
carried out prior to the application of SpECbuild
EM.
Grit blasting is recommended to ensure the removal
of all laitance, grease and oil. The resulting surface
should be dry and dust free.
The repair boundary should be cut back to a depth
of at least 10mm to avoid feather edging.
All corroded steel should be completely exposed
including the rear of the bar to enable thorough
cleaning. The steel should be cleaned to bright metal
immediately prior to the application of SpECcoat
Zn25 zinc rich protective coating. Apply one coat of
SpECcoat Zn25 to the cleaned steel ensuring full
coverage, allow to dry before commencing the next
step.
Priming
The prepared surface should be primed with
SpECtop Primer F1.
The contents of the curing agent should be emptied
into the base component and stirred with a spatula
until the product appears uniform.
The mixed primer should then be applied to the
prepared substrate by a stiff brush at 10-15m²/litre.
If the primer appears to be absorbed into the
surface easily, it will be necessary to apply a
second coat once the initial coat is tack free.
Allow the primer to become tacky prior to the
application of SpECbuild EM.
Mixing
SpECbuild EM is supplied as a three-component
kit consisting of a base component, a curing agent
and a bag of selected, graded aggregate.
The two resin components should be stirred
separately before mixing the two together to a
homogeneous consistency.
The entire quantity of the
resin is placed into an
appropriately sized forced
action mixer and the
aggregate is slowly added
to the resin with the mixer
running. Continue to mix for a further 3 to 5
minutes until all the components are thoroughly
blended. The mixing of part packs should not be
undertaken.
Application
Apply the mixed product firmly onto the tacky primer
using a trowel to build the required thickness and
use a wooded float to ensure complete compaction
and a secure bond. Where access to the substrate is
difficult such as around steel reinforcement a gloved
hand may be used for placing. The application is
always completed by closing the surface of the
mortar with a steel trowel before it sets.
Application in excess of the thickness quoted
previously may be achieved by scratch-keying the
previous layer. Subsequent layers should then be
applied within 10-12 hours. If this time is exceeded
the surface should be reprimed prior to the
succeeding applications.
Overcoating
Where SpECbuild EM is used in a hygienic
situation then it may be overcoated with a suitable
epoxy resin coating such as SpECtop ARE125.
SpECbuild EM is supplied in 12 litre (0.012m³)
packs. Each pack gives 2.4m² at 5mm thick.
SpECtop Primer F1 is supplied in 1, 5 and 15 litre
packs. The coverage is approximately 10-15
m²/litre.
Contact us for more info.
