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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Supplied as a ready to use blend of dry powders requiring only the site addition of clean water to produce a highly consistent cementitious fairing mortar
• Based on a blend of cements, graded aggregates, special fillers and chemical additives to provide a material with good handling characteristics, while minimising water demand
• Compatibility with structural and non-structural concrete of compressive strength 20 - 45 MPa
• Polymer-modification provides extremely low permeability to water, carbon dioxide and chlorides
• Excellent bond to concrete
• Can be applied quickly and efficiently
• One component, pre-bagged to overcome site-batched variations
• Contains no chloride admixtures

Uses

• Designed for application in thin layers to produce a fair-faced appearance to concrete or masonry surfaces in readiness to receive a protective/ decorative coating
• Surface imperfections up to 3 mm in depth can be filled with the scrape-coat application
• Voids of greater depth should be separately filled as a prior operation, again limiting the material thickness to 3 mm
• Alternatively, consideration should be given to the use of Renderoc RP252 reprofiling and protection mortar

Application Notes

• Renderoc repair mortars require no additional preparation prior to the application of Renderoc FC
• No independent priming system is required
• Mix using a forced-action mixer or a in a suitably sized drum using a Renderoc Mixing Paddle (MR4) with a slow speed (400/500 rpm) heavy-duty drill
• Apply to the prepared substrate by steel trowel as a scrape coat of minimal thickness
• The material should not be applied when the substrate and/or air temperature is 5°C and falling. At ambient temperatures above 35°C, the material should be stored in the shade and cool water used for mixing
• Does not require any form of curing in moderate ambient conditions, but under strong drying conditions (e.g. high winds) curing may be necessary
• Large areas should be cured as trowelling progresses (0.5 m2 at a time) without waiting for completion of the entire area
• Must be overcoated with the Dekguard range of coatings or suitable alternatives. The surrounding parts of the structure will benefit from the application of a barrier/decorative coating to limit the advance of chlorides and carbon dioxide
• Should be removed from tools, equipment and mixers with clean water immediately after use. Cured material can only be removed mechanically
• Yield: Approx. 15.0 litres / 25kg bag (5m² at 3mm thickness)

Note: the actual yield per bag will depend on the consistency used.

Limitations

• Should not be used when the temperature is below 5°C and falling
• Due to the lightweight nature of Renderoc FC, the product should not be used in areas subjected to traffic (in these circumstances, Renderoc ST 05 should be considered)
• Should not be exposed to moving water during application
• Exposure to heavy rainfall prior to the final set may result in surface scour
• Care should be taken to ensure that the product is thoroughly mixed. As with other ‘one pack’ repair mortars, Renderoc FC may exhibit satisfactory handling characteristics even though inadequately mixed. This will result in a significantly lower level of performance or possible failure. It is therefore essential that mixing Instructions are strictly adhered to with particular emphasis on the quantity of water used and the time of the mixing operation
• Renderoc FC is non-flammable