Underground
The underground must be free by loose components. Large unevenness are to be adjusted.

Position and layer:
the injection hose is installed in the joint center within the armouring. The minimum concrete cover is 8 cm and may be no less. The injection hose must always have contact to the underground. The “Proflex” hose is to be installed with the yellow profil underheath..
Only then are the outlets directly aligned with..

Attachment
a) The instalation clips are put into the fresh concrete at 15 cm intervals and after the concrete has set the injection hose is clipped into the clips.

b) OR clamp metal clips on to the injection hose and fix these at intervals of max. 15 cm with pin shots or steel nails.

c) Joints and places of overlap are to be dealt with in such a way that the injection hoses overlap for a minimum of 5 cm. The distance between both hoses must be no less than 3 cm. Clamp the hose ending and secure it with a metal clamp. Finally screw the ventilation end into the shutter connector (if this is required).

Shortening or extending:
Shortening: simply take the requires length out of the middle and reconnect the remaining ends with the hose connector.
Extension (max.12 m): split the hose and screw the extension hose on with connector plugs. The extension hose is a complementary part and can be ordered additinally.

These errors are to be avoided:
Never install the injection hose directly on the armouring. Never install the injection hose on trap of one other. Install the injection hose so that it does not come into contact with a gap or a joint. If the hose is put under pressure later, resin could come out at these points and pressure could not be built up. Therefore the hose should be protected in these areas. A minimum distance of 5 cm to expansion joints should be kept.

Injection pumps
Depending on the quantity of the building components to be injected, we recommend for
~ Large quantities: an electrical single-component injection pump
~ Average quantities: an electrical single-component injection pump
~ Small quantities: a simple hand press.
The injection pump must have infinitely variable pressure regulation. The pressure should be continuously monitored using a manometer.

Injection
~ Screw the conical-head nipple into the first shutter connector.
~ Bleeding the hose: Fill the first injection circuit with resin, until resin extrudes from the second shutter connector.
~ Close off the second shutter connector with another conical-head nipple.
~ Introduce more resin with moderate and long-lasting pressure.
~ Run the injection pressure from 0 up to max. 80 bar in a controlled manner.
~ Long-lasting, moderate pressure is better than short-term, high pressure.
~ The resin must be given the opportunity to penetrate into even finelybranched cracks.
~ Caution: It is possible to create considerable pressure even using only a hand press (hydraulics).
~ Whatever happens, re-inject once, better twice, within the resin workability time.
~ It is not necessary for the resin to extrude from the construction joint to show that the seal is functioning.
~ If water is flowing strongly through the untreated joint, observe the flow speed. The resin must have the opportunity to harden inside the joint without being flushed out. If necessary, take suitable precautions before injecting.

Repeated injection
~ Using acrylic resin the Proflex injection hose is reusable.
~ Producing the acrylic resin mixture:
~ Meter the required volumetric amounts of the components 1:1 and mix them thoroughly by means of a mixing device (e.g. a drill with mixing paddle). Stirring by hand is not sufficient. After mixing the resin is ready to use - no additional conditioning period.
~ Screw the conical-head nipple into the first shutter connector.
~ Bleeding the hose: Fill the first injection circuit with acrylic resin, until resin extrudes from the second shutter connector.
~ Close off the second shutter connector with another conical-head nipple.
~ Introduce more resin with moderate and long-lasting pressure.
~ Run the injection pressure from 0 up to max. 80 bar in a controlled manner.
~ Long-lasting, moderate pressure is better than short-term, high pressure.
~ The resin must be given the opportunity to penetrate into even finelybranched cracks.
~ After the injection work is done and before the resin hardens, the hose must be emptied and flushed with tap water, so that the hose can be reused if necessary.

Emptying the hose:
Open the injection circuit at both ends (remove the conical-head nipples)
a) Emptying/Cleaning with air pressure - apply maximally 1 bar of air pressure at one of the two shutter connectors of the injection circuit and blow the hose empty, then briefly scour/flush it with tap water.
b) Emptying/Cleaning with water - apply maximally 1 bar of water pressure at one of the two shutter connectors of the injection circuit and blow the hose empty.
c) Emptying/Cleaning with vacuum - connect the vacuum-producing device to one of the two shutter connectors of the injection circuit and evacuate the hose, then briefly flush it with tap water.

Resin consumption
~ Empty Proflex injection hose capacity: 0.4 kg/10 lin. m
~ Normal consumption: 1 kg/10 lin. m
~ The concrete quality in the vicinity of the construction joint does, of course, play a crucial role in the resin consumption. The use of a starter mix of 0/8 grain size has been found to be useful in reducing the consumption.

Cleaning the tools
Using PUR resins, tools and equipment used for the injection work can be cleaned with the special cleaner before the resin has hardened.
Using acrylic resin, tools and equipment can be cleaned with tap water before the resin has hardened.