APPLICATION INFORMATION

Consumption Application Product Consumption Light duty Sika® Chapdur (IN) 3.5–4.0 kg/m2 Medium duty Sika® Chapdur (IN) 4.5–5.0 kg/m2 Heavy duty Sika® Chapdur (IN) 5.5–6.0 kg/m2 Layer Thickness 2.5–3.0 mm at dosage of ~5.0 kg/m2 Ambient Air Temperature +5 °C min. / +35 °C max. Relative Air Humidity 30% min. / 98% max. Substrate Temperature +5 °C min. / +35 °C max. Applied Product Ready for Use Foot Traffic Fully serviceable ~72 hours ~7 days The above values are at substrate temperature of +27 °C and dependant upon the concrete reaching its design strength for serviceability and will be affected by changing ambient conditions, particularly temperature and relative humidity.

APPLICATION INSTRUCTIONS SUBSTRATE QUALITY

▪ The concrete deliveries must be of consistent quality. A concrete slump in the range 75 to 110 mm will normally give best results. ▪ The slab must be of good quality concrete with a minimum water/cement ratio consistent with the production of a fully compacted slab. ▪ The compressive strength must be a minimum of 20 N/mm2. ▪ Use of Sikament® or Sika® Viscocrete® super plasticisers is advised to ensure the optimum quality of concrete and where fibers are used, their optimum dispersion within the mix. ▪ Air Entrained Concrete is not a suitable substrate for the application of dry shake hardeners. ▪

APPLICATION

Application time for dryshake products is influenced by every variable which affects the placing of concrete, and can therefore vary substantially, depending on the prevailing conditions. Dependent on the conditions, remove the surface bleed water or allow it to evaporate. Sprinkle Sika® Chapdur (IN) onto the screed concrete evenly in 2 stages, first stage 60% and second stage 40%. Care must be taken to apply the product without creating ripples etc. in the concrete surface. The first application must be worked into the slab immediately followed by application of the second stage quantity of Sika® Chapdur (IN). Final finishing, closing pores and removing undulations can be achieved either by hand or powered trowel. Please also note: Never add water to the surface where the dry shake has been applied. ▪ Sika® Chapdur (IN) results in the slab surface becoming stiff more quickly than usual. Careful trimming must take place along the edges where adjoining slabs are to be poured. ▪ Periodical checking of the condition and development of the concrete will determine the correct time frame for each stage and sequence of application. For mechanical application with automatic spreader and laser screed, the spreading can start almost immediately after the concrete has been levelled to allow for the hydration of the dryshake. Compaction with the trowel can start as soon as the weight of the power trowels is supported by the concrete. For manual application, the dryshake must be spread once the concrete can be stepped on, without leaving a print deeper than 3–5 mm.

CLEANING To maintain the appearance of the floor after application, Sika® Chapdur (IN) must have all spillages removed immediately and must be regularly cleaned using rotary brush, mechanical scrubbers, scrubber dryer, high pressure washer, wash and vacuum techniques, etc., using suitable detergents and waxes. LIMITATIONS The application of the dry shake powder must not be carried out in strong wind or in dry conditions. ▪ Variations in concrete characteristics such as water content and cement may lead to slight colour variations. ▪ Dry shake hardeners give a finish to concrete with some colour variation across the floor due to the natural variability of the concrete onto which they are applied. ▪ To ensure optimum colour consistency, it is essential that the floor laying operation is as clean and protected from the environment as possible. ▪ Colour variation during the drying out period is normal for this system and is to be expected. ▪ Every effort must be made to ensure an even application of Sika® Chapdur (IN). Correct timing and trowelling techniques are essential. ▪ At low relative humidities, efflorescence can appear on the surface. ▪ At high relative humidites, bleeding, slower curing and hardening can occur and extended finishing operations be required. ▪ For mechanical application, use automatic spreader in conjunction with a laser screed and spread Sika® Chapdur (IN) evenly onto the concrete immediately after screeding in one application. ▪ After application, do not expose such concrete surface to water and protect from rain or contaminants. ▪

BASIS OF PRODUCT DATA

All technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstances beyond our control. LOCAL RESTRICTIONS Please note that as a result of specific local regulations the declared data for this product may vary from country to country. Please consult the local Product Data Sheet for the exact product data. ECOLOGY,

HEALTH AND SAFETY

For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Safety Data Sheet (SDS) containing physical, ecological, toxicological and other safety-related data.

LEGAL NOTES

The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith based on Sika’s current knowledge and experience of the products when properly stored, handled and applied under normal conditions in accordance with Sika’s recommendations. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies of which will be suppied on request.