Rapid foaming and setting resin for stopping fl ow of water
Uses
Stops the flow of water when injected into cracks in
concrete in the presence of moving water. Nitofi ll WS60 with
Nitofi ll UR63 provides an effective system for crack sealing in
wet conditions.
Advantages
Seals against water: Reacts and produces foam resistant
to water
Rapid acting : Rapid reaction to produce water stop in
presence of fl owing water
Reinjectable : Can be reinjected with Nitofi ll UR63 to produce
a permanent seal.
Description
Nitofi ll WS60 is a two part liquid polyurethane when mixed in
the proportions supplied it reacts rapidly with water to form a
foam barrier.
Technical support
The company provides a technical advisory service supported
by a team of specialists in the fi eld
Typical properties
Specifi c gravity
(ASTM D891-18) 1.12
Density of foam
(ASTM D792-13) 0.022
Viscosity at 200
(ASTM D4402-15) < 1 Poise
Pot life, in absence of water
at 200C 6 - 8 hours
at 300C 3 - 4 hours
Reaction time with water 5 to 30 seconds dependent
upon temperature
Specifi cation clause
Water-stopping crack injection resin
Water-stopping crack injection resin foam shall be Nitofi ll
WS60, a two part foaming liquid polyurethane. When mixed
in the proportions supplied and injected into cracks in
concrete, the resin shall react with moving water to form a
foam water-stopping barrier.
The water-stopping injection resin shall have the following
properties; pot life, in the absence of water, 6-8 hrs at 20oC;
specifi c gravity of 1.14 + 0.06; foam density of 0.025.
When used in conjunction with Nitofi ll UR63, a fl exible two
part polyurethane injection resin, it shall form a permanent
seal in cracked concrete.
Application Instructions
Surface preparation
Clean area of concrete so cracks are identifi able.
It is recommended to use packers especially when injecting
against running water. Other techniques may be used, but are
application specifi c.
Drill holes to suit the specifi c dimensions of the packers and
should be spaced at between 150 to 500mm intervals depending upon the crack width, depth and pressure of water. Angle
should be at approximately 45° and bisect the crack in the
centre of the concrete where possible. If rebar is struck, stop
drilling and move drilling point to adjacent area.
Where possible stagger the injection points either side of the
crack.
Insert packers and ensure they are tight to the concrete. If
necessary they may be sealed with Nitomortar PE and Renderoc Plug as well.
Mixing & Application
Thoroughly mix the accelerator with the base resin, taking
care to exclude moisture as much as possible. Place in an
enclosed container after mixing, there may be a skin formation
on the surface but the liquid underneath will be satisfactory for
use during the stated pot-life of the product.
Nitofi ll WS60 requires the presence of water to react and
harden. If there is no water ingress at the time of injection,
cracks should be pre-injected with water.
Nitofi ll WS60 is suitable for use with all common 1 component application equipment, typically an electric pump will
yield the best results when injecting against hydrostatic water
pressure.
Inject Nitofi ll WS60 along the line of the crack methodically,
ensuring that the material is working its way along to the next
point. If injecting vertical cracks it is generally advised to begin
at the bottom of the crack and work upwards.
Take care not to over pressurise injection as this may lead
to further cracking of the concrete or displacement of packers.
If material is fl owing without resistance, stop and allow
material to gel. If material is still fl owing consider increasing
the amount of accelerator or changing the spacing of injection
Nitofi ll WS60 should stop water adequately if cracks are
static. However, if further movement is anticipated, it is advised
that a secondary injection of Nitofi ll UR63 is applied.
Nitofi ll UR63 may be injected through the same injection
ports after initial set has taken place and the contractor is
confi dent running water has been stopped.
Finishing
Once the injection process has fi nished, remove injection packers and fi ll with Nitomortar PE and Renderoc Plug or other
appropriate Renderoc material. Scrape off any foam residue
from the cracks and dispose of appropriately.
Cleaning
Use Nitofl or Sol for all tools and equipments
Storage
Six months shelf life if stored at 200C
Packaging
Nitofi ll WS60 1, 5 & 20kg
Nitofi ll UR63 1, 5 & 20kg
Nitomortar PE 5 L
Nitofl or Sol 5 & 20 L
Renderoc Plug 5 kg
Precautions
Health and safety
Some people are sensitive to resins so gloves and a barrier cream should be used when handling Nitofi ll WS60. If
contact with the resin occurs, it must be removed, before it
hardens, with a resin removing cream. Follow by washing
with soap and water. Do not use solvent. The use of goggles
is recommended but should accidental eye contamination occur, wash thoroughly with plenty of water and seek
medical treatment immediately. Ensure good ventilation and
do not smoke during use.
Fire
Nitomortar PE and Nitofl or Sol are fl ammable
Flash point
Nitofl or Sol 330C
Nitomortar PE resin 290C
Additional information
Nitofi ll WS60 is part of a wide range of adhesive, grouts, repair
mortars and sealing compounds specifi cally designed and
manufactured by Fosroc for the construction industry
Important note :
Fosroc products are guaranteed against defective materials and manufacture and are sold
subject to its standard terms and conditions of sale, copies of which may be obtained on
request. Whilst Fosroc endeavours to ensure that any advice, recommendation specifi cation
or information it may give is accurate and correct, it cannot, because it has no direct or
continuous control over where or how its products are applied, accept any liability either
directly or indirectly arising from the use of its products whether or not in accordance with
any advice, specifi cation, recommendation or information given by it.
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