Avista - Wet Concrete - Surface Retarder

  • Avista - Wet Concrete - Surface Retarder

Avista Surface Retarder is ready to use water-based retarder which is used on freshly laid concrete to reveal the aggregate content of the mix. Perfect for horizontal concrete surfaces.

  • Turns blue on application for easier visibility
  • Wash off time of between 3-24 hours
  • Covers 3-5 m2 per litre
  • Water clean up

Easy to Use
Ready to Use
Water Based
Horizontal Application
Item Code
15049
Pack
Drum 20 Lt

Available Options

About Avista Surface Retarder

Avista Surface Retarder is a water based retarder for concrete surfaces, which is ready for use on freshly laid concrete to reveal the aggregate content of the mix.

Uses

Avista Surface Retarder is used to reveal aggregate in freshly placed horizontal concrete by delaying the surface set so that the mortar paste may be washed from between the aggregate particles, after the mass of the concrete has set. This produces an attractive exposed aggregate finish, or a key for subsequent pours or renders, e.g. floors, driveways, paving, etc.

Advantages

  • Ready to use, no mixing is required.
  • Water based.
  • Easy to see blue colour to ensure even coverage.
  • Long wash off time of between 3 to 24 hours.
  • Provides an attractive, decorative exposed aggregate finish.
  • Surfaces treated with Avista Surface Retarder provide an excellent key for bonding subsequent renders or concrete, without the need for hacking, or mechanical scabbling
  • Economical and simple method of horizontal concrete surface revealing

Properties

Avista Surface Retarder is a stable water based solution and the active ingredients will remain in dispersion under sealed conditions. Avista Surface Retarder must not be diluted with any solvent or liquid.

  • Specific gravity: Approximately 1.05 kg/L @ 20°C.
  • Application Temperature: 10 - 30°C.

Coverage

3 - 5m² per litre per coat

Code Item Pack
15049 AVISTA - Wet Concrete Surface Retarder 20L

Application

Shake the product prior to use. Do not dilute contents. Apply an even coating via spray unit (garden sprayer or similar) directly onto the exposed upper surface of the concrete as soon as the initial ‘bleeding’ has finished, but before ‘initial set’ has occurred. When the Retarder is sprayed on the concrete, it will turn a blue colour making it easier to see when all the surface has been covered. Treated concrete surfaces must be protected from direct sunlight and wind, which may cause the surface to dry out rapidly. During the treatment process the concrete should also be protected from dirt and rain. Adequate curing procedures are essential.

After 3-24 hours, wash off using a high pressure water spraying unit (minimum of 2000psi) and a stiff broom to remove excess slurry. Care must be taken when using the high pressure unit to ensure the aggregate isn’t removed. The time to remove the concrete paste is dependent on the type of concrete used, temperature, wind, humidity.

Cleaning

Spray equipment should be cleaned immediately after use with hot water.

Limitations

Approval test - always pre test on a small section to determine the appearance achieved. This is particularly important with finer aggregates such as 6mm and 9mm and with concretes with accelerated set additives such as calcium chloride, heated or steam cured concretes, etc. Proper curing of exposed aggregate surface is essential for maximum strength development. High temperatures will reduce retardation and high cement contents will also reduce retardation. When retardation has finished, concrete will cure to its full strength.

Safety Data Sheet
Safety Data Sheet
Tech Data Sheet
Tech Data Sheet


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