Concure WB30 - Clear/White - Water based wax emulsion, curing compound - conforms to AS3799. Concure WB30 provides a spray-on membrane to retain moisture in concrete for effective curing. Used for concreting generally but especially useful for large areas of concrete
Concure WB30 provides a spray-on membrane to retain moisture in concrete for effective curing. Used for concreting generally but especially useful for large areas of concrete construction such as runways, motorways or bridgeworks.
Concure WB30 complies with the requirements of AS3799 -1998: liquid membrane - forming curing compounds for concrete.
A copy of the certification is available on request.
Concure WB30 is a low viscosity wax emulsion which incorporates a special alkali reactive emulsion system. This system ensures that the emulsion forms a non penetrating continuous film immediately upon contact with a cementitious surface. This impervious film prevents excessive water evaporation which in turn permits more efficient cement hydration thus reducing shrinkage and increasing durability.
To achieve the correct curing properties, Concure WB30 must be applied on to the substrate at the coverage rate 5m2 per litre.
All designated areas are to have a liquid curing compound applied to the freshly finished concrete. The curing compound will be based on wax emulsion, have a water retention efficiency of not less than 90% when tested to AS3799 and have a weight solids content of not less than 30%. Such a material is Fosroc Concure WB30. The curing compound is to be applied in accordance with the manufacturers application instructions.
Data quoted typical for this product, but does not constitute a specification.
| Concure WB30 Clear | Concure WB30 White | |
|---|---|---|
| Weight solids: | 31% | 32% |
| Specific gravity at 20°C: | 0.968 | 1.00 |
| Drying time: | 2 - 3 hours | 2 - 3 hours |
| Colour (wet): | White | White |
| Colour (dry): | Clear | White |
| Efficiency AS3799: | 91% | 93% |
| Viscosity: | Brookfield #2, 60 RPM at 25°C. Both grades 65 - 250 cP | |
| Minimum application temperature: | 5°C | 5°C |
Membrane break down: (applicable to both grades). The rate of degradation will depend upon initial membrane thickness and the degree of exposure to ultra violet light.
Light reflectance: 62% for white pigmented (must be more than 60%) ASTM 309-74.
| Code | Item | Pack |
|---|---|---|
| 7358 | Concure WB30 - Clear - Water based wax emulsion curing compound 20L | 20L |
| 2373 | Concure WB30 - Clear - Water based wax emulsion curing compound 200L | 200L |
| 8862 | Concure WB30 - White - Water based wax emulsion curing compound 200L | 200L |
Concure WB30 should be thoroughly mixed prior to use and spray applied to the surface of newly placed concrete. The compound should be applied as soon as possible after the concrete is free from surface water. The nozzle of the spray should be held approximately 450 mm from the concrete surface and should be passed back and forth to ensure complete coverage. The pump pressure should be maintained at a level producing a fine spray.
Concure WB30 should not be continuously re-circulated through high shear gear pumps when used in concrete train application. If continuous re-circulation is essential the sprayer should be fitted with a low shear diaphragm pump. Rate of application should be 5.0 /litre.
For the application of Concure WB30, various types of spraying equipment can be used, i.e. knapsack or motorised sprays.
Immediately after use the spraying equipment should be cleaned out with water. If the spray nozzle becomes blocked with wax particles these can be easily removed using white spirit or similar fluid.
Due to the wax film produced, Concure WB30 must not be used as a curing aid on surfaces subjected to after trade treatments.
Concure WB30 has a slightly tacky surface after application which can attract dust and site contaminants.
Do not brush on to soft, wet concrete or render surfaces which will be disturbed and thus prevent formation of the curing film.
Concure WB30 should not be used as the curing compound for any metallic based integral floor hardeners. Concure CR or Concure HR90 should always be used to prevent rusting of the metallic aggregate.
Concure WB30: 5.0 m² per litre
The coverage figures given are theoretical - due to wastage factors and the variety and nature of possible substrates, practical coverage figures will be reduced.
Concure WB30 has a shelf life of 18 months when stored at temperatures between 4°C and 35°C. Containers should be kept airtight to prevent surface evaporation. Freezing or prolonged exposure to direct heat or direct sunlight must also be avoided.
