SpECtite WS crystalline waterproofing system is
used for waterproofing against the positive or negative sides of hydrostatic heads of water and damp
proofing in a wide range of conditions like:
· Sewage treatment and water treatment plants,
tanks, foundations, tunnels and manholes.
· Terrace garden, balconies, sunshades, etc.
· Roof and Sunken slabs.
· Industrial and Office buildings.
· Reservoirs, water holding structures, etc
· Meets the requirements as per BS6920 for
suitability to potable water.
· Penetrates concrete, seals capillary tracts.
· Contains no chloride.
· Easy to apply.
· Resists chemical attack of sewage and industrial
wastes.
· Suitable for external and internal applications.
Surface preparation
Old Concrete
Surfaces must be clean and sound. Remove all oil,
dirt, laitance and other contaminants by water blasting.
Water blasting is preferred for surface preparation
because it mechanically cleans and roughens the
surface, is environmentally safer and leaves the surface saturated with water. Surface must be damp for
application of SpECtite WS crystalline waterproofing system, concentrate.
New Concrete
After forms are stripped, acid etch or water blast as
above to remove form oils and laitance. Surface
must be left damp for application on SpECtite WS
crystalline waterproofing system.
Construction joints, cold joints and non-leaking joints
greater than 0.25mm wide must be cut in V-groove
shape and filled with SpECtite WS crystalline
waterproofing system in mortar consistency.
Mixing
For best results, clean, potable water should be
added to SpECtite WS crystalline waterproofing
system concentrate. The recommended mixing ratio
is approximately 5.0 litre of water for 25 kg bag of
SpECtite WS.
The powder shall be added to the clean water and
mixed thoroughly with-slow speed drill equipped with
a paddle. For larger batches, mixing shall be done
with a mortar mixer. Do not mix more material than
can be used in 20 minutes @ 24°C, 50% R.H. If
mixture thickens, it shall be restirred to reduce
consistency. Extra water should not be added.
Brush/Trowel Method
When applying by brush use a medium hard, short
bristle type. Trowelling of the second coat can be
carried out to provide a dense polished finish.
Spray Method
For large areas spray application is obviously more
economical – our technical department would be
pleased to advise on suitable equipment.
Dry Shake Method
SpECtite WS can be uniformly applied in powder
form on Lean Concrete before casting the slab as
long as it is ensured that the concrete casting
process does not disperse the SpECtite WS powder.
SpECtite WS can also be applied uniformly onto the
concrete in powder form and then finished with
helicopter trowel.
Curing and Protecting
SpECtite WS crystalline waterproofing system
application must be kept moist for a minimum of 48
hours. After initial set, treated surfaces shall be fog
sprayed 3 to 4 times daily for the 48 hour period. For
warmer climates, more frequent spraying may be
required. It is important to keep the SpECtite WS
crystalline waterproofing system moist to allow the
crystal formation to occur. The surfaces shall be
protected from foot traffic for 48 hours or heavy
traffic
for 7 days. Freshly applied SpECtite WS crystalline
waterproofing system must be protected from
extreme weather conditions such as rain, strong
winds, high temperatures and freezing for a period of
not less than 48 hours after application. A minimum
of 7 days of air curing shall be allowed prior to
immersing the surface in water.
Clean Up
Prior to curing, SpECtite WS crystalline waterproofing system concentrate may be cleaned from tools
and other surfaces with water.
SpECtite WS is supplied in 25kg bags.
Coverage
0.8 to 1.2 kg/m² per layer
(Please contact SpEC Technical Department for
consumption details for various application)
Contact us for more info.
