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Koster KB-PUR 2 IN I Injection Resin
   
WATER ACTIVATED PU-INJECTION RESIN FOR ONE-STEP INJECTION OF WATER BEARING CRACKS AND JOINTS
         DESCRIPTION
 
The KB-PUR 2 IN 1 is a water activated hydrophobic polyurethane pre polymer. The system reacts if it has contact with water to a foam and under dry conditions it reacts to form a solid elastic resin. KB-PUR 2 IN 1 is free of solvents and fillers; it is resistant to hydrolysis. KB-PUR 2 IN 1 cures to a hard elastic resin and a subsequent injection with a solid resin is therefore obsolete This means that KB-PUR 2 in 1 both functions as a water reacting PU foam and as a solid elastic resin for permanent sealing of leaking cracks.
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TECHNICAL DATA
Mix viscosity at 25°C /77°F 250 mPa.s
Volume increase: max. 1:20
Density( 20 °C /68°F) app. 1.1 kg/l
Spec. gravity of the cured foam app.0,05- 0.1 g/cm³
Starting time app. 50 seconds
Expansion time app. 180 seconds
Non-sticky after app. 6 minutes
Reaction time without water contact Approx. 24 hours
Mix ratio (by weight.) 1 : 1 (A : B)
Mix ratio (by volume) 1 : 1 (A : B)

FIELD OF APPLICATION
Used for stopping pressurised water in cracks and joints permanently. Because of its flexibility, a follow up injection with a flexible resin is therefore not required.

APPLICATION
Adapt material temperature to room temperature- or surrounding temperature. The substrate has to be free of loose particles, dust, oil, grease, form oil and other contaminants that might affect the bonding adversely. Before application can commence, grout ports (screw type preferred) should be placed. Mark pattern for drilling holes; holes should be staggered on each side of the crack, they should be angled 450 towards the wall and drilled so that they intercept the crack in the middle. Remove drilling dust from holes, tap a grout port into each hole and tighten sufficiently. Crack openings or voids should be sealed using KB-Fix or similar quick set mortars. Add the KB-PUR 2 IN 1 B comp. to the KB-PUR 2 IN 1 A comp. and mix thoroughly with a slow speed mixer until a homogeneous mixture is obtained (avoid mixing humid air into the resin). Inject the material with conventional single component pumps with high or low pressure. Always start at the bottom and continue upwards

For injection into dry or moist cracks, the material can be injected in one operation.

For leaking cracks, KB-PUR 2 in 1 should be injected in 2 operations: Step 1.: Injection in KB-PUR 2 in 1 until foam can be seen around packers and crack seal. Step 2. Within 10-20 minutes, KB-PUR 2 in 1 should be injected again through the same injection packers. Please observe the pot life of the mixed materials.

CONSUMPTION
App. 0.1 kg/l void (foam)
App. 1.1 kg / l void (solid resin)

CLEANING OF TOOLS
Immediately after use with KB-PUR Cleaner II or ethylene acetate, Xylol, Toluol, MEK or other suitable water free solvents.

PACKAGING
25, 5 and 1 kg combi-set

STORAGE
6 months when stored In a dry cool place. Once opened, containers should be purged with nitrogen and resealed to prevent moisture reactions in the containers.

SAFETY PRECAUTIONS
Wear protective gloves and goggles.




 
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