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RepairPro Inject WS

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Rapid-setting, solvent free, flexible, polyurethane injection foam for filling voids, joints and racks to stop water flow
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SKU
RPIWS
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DATA RESULT
AppearancePart APart B Flowing LiquidsClear yellowishBrownish
Pot Life (Working Time) 2 hours @ 25 °C
Mix Viscosity <300 cPs
Blowing time 5 to 30 seconds in presence of water
Expansion rate 30-40 times by volume
Specific gravity - Mixed (ASTM D1475-98) 1.1 g/cm³ @ 25 °C
Application Temperature From -20º C to +45º C
Service Temperature From -20º C to +60º C
Flash Point Non-flammable 
Odour Minimal, non-offensive
VOC content 0 g/ liter

Description

RepairPro Inject WS is a rapid setting, solvent-free, polyurethane injection foam to temporarily stop flow of moving water. It reacts with moving water and expands in volume upon contact with it to form a foam barrier. Used in conjunction with RepairPro Inject UR, a flexible low viscous polyurethane resin, it forms a permanent seal in cracked concrete.

Can be injected with a one component pump, being a long pot life system. RepairPro Inject WS is not designed as a permanent solution to water movement and must be used in conjunction with other means of permanently stopping the water flow. Other injection resin systems such as RepairPro Inject UR (in wet situation), RepairPro Inject EPLV (in dry situation), should be considered.

RepairPro Inject WS is designed to stop the movement of water in cracked concrete for crack widths widths between 0.2 mm and 5 mm, depending on water flow. It is a two-component polyurethane system consisting of a resin component and a special type of isocynate. (MDI based).

Additional Information

Packaging: Coverage/ Yield:
1 litre and 20 litres unit*Materials are pre-weighed and only require on site mixing. Depends upon the width and depth of substrate crack. Subjected to site conditions, proper estimations of material shall be provided once dimensions and nature of cracks are determined.

Typical Applications

  • Pre injection of live cracks and joints in concrete, stone and masonry
  • Sealing of flowing / leaking water through voids cracks and joints in concrete structures
  • Filling of water bearing voids

Recommendations:

  • Only full unit of the product shall be mixed by mechanical means with a slow speed drill & spiral paddle
  • Mix only sufficient material that can be applied using available labour and equipment to ensure a continuous and uninterrupted application. 
  • RepairPro Inject WS is only to be used for temporary water-stopping. It should not be relied upon for permanent sealing. At high water pressures, on wide cracks RepairPro Inject WS may not be capable of stopping water
  • Pump may be cleaned with Ecosolve, a cleaning product, specially designed for cleaning injection pump

Benefits

  • Reacts with water to produce water resistant foam to stop water
  • Rapid acting, to produce water stop against moving water under pressure
  • Re-injectable with RepairPro Inject UR to form permanent seal
  • Flexible to withstand differential movement
  • Tough to stand up to high hydrostatic pressures
  • Cures to an impermeable mass
  • Solvent free - Can generally be used in confined
  • spaces without ventilation
  • RepairPro Inject WS resin has excellent resistance to most aqueous substances and liquids. These include: Sea water, Brackish water, Effluent and raw sewage, Acids of low concentration, Alkalis, Oils (mineral and organic)
Technical Data Sheet Download
Material Safety DataSheet Download
Test Reports Download
Substrate Preparation

In the presence of running water the flow must be stopped using RepairPro Inject WS which produces a rapid setting water-stopping foam. When the water is stopped the cracks are re-injected with RepairPro Inject UR. All cracks must be sealed and injection packers or nipples located in place before RepairPro Inject UR is injected.

Fixing injection packers:

Fix appropriate injection packers into pre-drilled holes at intervals along the length of the crack. The distance between each packer will depend upon the width and depth of the crack line with an angle of 45° to the surface. The holes should be 5-10 cm away from the crack line and deep enough for passing across the crack plane and reach opposite side. Spacing shall be close enough to ensure that the resin will penetrate along the crack to the next point of injection. Remove dust developed during the drilling process and clean the holes. Insert entry ports/nipples into the prepared holes, screw and fix tightly. All the cracks and nipple sides should be sealed with RepairPro EP FC (dry cracks) and AnchorPro PE SF (damp surfaces), 30 to 40mm wide and 2 to 3 mm thick by using a spatula or trowel to prevent the leakage of injection resin from the crack openings. Both sides of any cracks which go all the way through a wall or slab shall be sealed in this way.

Please note: Where water flow is severe the RepairPro EP FC application can be omitted.

In the case of a wall or slab cracked all the way through, packers shall be located on both sides with those at the back placed at midway points between those at the front

Product Preparation

The two components of RepairPro Inject WS, must be mixed together. Pour component B into component A and mix by hand using a trowel (for small amounts), or with a low-speed heavy duty drill (for large quantities), avoiding the formation of air bubbles, until the mix is completely homogeneous. Do not use partial quantities of the parts as this may produce an imbalance in the proportions which could lead to incomplete reaction of RepairPro Inject WS. If partial quantities are required use an electronic precision scale.

RepairPro Inject WS is designed for the application with 2 component injection machines, where the mixing happens within the nozzle or pistol. Therefore, it is supplied in two separate components, in the correct quantities, ready for use.

For hand mixes up to 1000ml make sure that the material can be fully applied before it starts to harden and develop heat. Add Part B into Part A in the correct volume ratio and mix intensively for about 1 minute with a suitable mixing tool. A homogenous mixture must be obtained, no streaks must be visible.

The cracks must be free of dirt and dust. The sides of the cracks may be damp (except for gravity feed application) but must be clean. Before the injection application, plan the position of the entry ports/nipples

Product Application

Wet conditions

  • Add the accelerator to RepairPro Inject WS, mix quickly and thoroughly
  • Inject this mixture through a single component injection pump. The moisture / water in the ground or structure will cause the foaming reaction.

Dry conditions

  • For injection purposes, flush the cracks with water to thoroughly wet the injection area.
  • Add accelerator to RepairPro Inject WS, mix quickly and thoroughly.
  • Inject this mix through a single component injection pump.

The RepairPro Inject WS injection should be followed by injection of RepairPro Inject UR to achieve a more durable seal. The injection pressure should be at least 0.4N/mm² (4 bar). After 24 hours, visually check the cracks for any possible deficiencies on the crack surface. Remove the packers and make good any holes or voids with RepairPro EP FC and allow to cure. The RepairPro EP FC can be ground off or softened with a blow lamp and peeled off. Do not allow to burn.

Reaction Time:

The reaction time is dependent on substrate and material temperature. The examples of reaction times with the maximum accelerator dosage (see Table 1) have been measured in the laboratory. However, it is advisable to check the required reaction time on site.

Initial Temperature °C 5 10 15 20
Start of reaction (sec) 130 65 30 15
End of reaction (sec) 350 250 120 60
Foam factor Approximate Free foam 20 25 25 30

 

Site trials should always be performed prior to commencing the works.

Others

Cleaning:

Clean tools, equipment and mixers with solvent immediately after use. Hardened material can only be removed mechanically.

Storage & Shelf Life:

6 months from manufacturing date in original and unopen packaging, under cover, in dry condition, away from humidity, heat, moisture, protected from extreme temperatures, rainfall & direct sunlight. Failure to comply with the recommended storage conditions may result in premature deterioration of the product or packaging. these materials are both temperature and moisture sensitive. Therefore, materials should be stored in an area with temperatures not exceeding 30°C or not lower than 10°C. The maximum shelf life is one year. All partially used drums should be covered with nitrogen and re-sealed to prevent the ingress of moisture.

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