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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Supplied as a ready to use blend of dry powders which requires only the site addition of clean water to produce a highly consistent, repair mortar
• Based on Portland cements, graded aggregates and chemical additives providing a mortar with good handling characteristics while minimising water demand
• Low water requirement ensures good strength gain and long-term durability
• Maximum compatibility with concrete of compressive strength 30 - 60 MPa
• High abrasion resistance
• Polymer-modification provides extremely low permeability to water, carbon dioxide and chlorides
• Exceptional system of shrinkage compensation provides long-term dimensional stability
• Can be applied quickly and efficiently by wet spraying
• One component, pre-bagged to overcome site-batched variations
• Contains no chloride admixtures

Application Notes

• Specifically engineered for vertical or horizontal use. It can be applied up to 10 mm thickness in vertical locations and up to 100 mm thickness in horizontal locations in a single application
• Thicker sections can be built up in layers. Thicknesses vertically greater than 10 mm can be achieved by spray application
• For horizontal trafficked locations individual bays should not exceed 4 m² in area
• The material should not be applied at less than 5 mm thickness
• To prime reinforcing steel, apply one full coat of Nitoprime Zincrich Plus and allow to dry before continuing
• Prime concrete by scrubbing Nitobond AR into the surface
• In all areas subject to trafficking, where a substrate/repair barrier is required or where the substrate is wet or likely to remain permanently damp, Nitobond EP bonding aid should be used
• A forced-action mixer is essential. Mixing in a suitably sized drum using an approved Renderoc Mixing Paddle (MR4) with a slow speed (400/500 rpm) heavy-duty drill is acceptable for the occasional one-bag mix
• Apply the mixed product by gloved hand or trowel
• Can be quickly and efficiently applied by the wet spray technique. In circumstances where large areas of repair are required, the rapid placement and higher build attainable by this method offer economic advantages over hand-trowelling. The resultant repair also offers a generally more dense compound with enhanced mortar/substrate bond characteristic
• Wooden, steel or plastic floats, or damp sponges, may be used to achieve the desired surface texture
• At 5°C static temperature or at 5°C and rising, the application may proceed using warm mixing water (up to 30°C), at ambient temperatures above 35°C, the material should be stored in the shade and cool water used for mixing
• In common with all cementitious materials, it must be cured immediately after finishing in accordance with good concrete practice. The use of Nitobond AR, sprayed on to the surface of the finished mortar in a continuous film, is recommended. Large areas should be cured as trowelling progresses (0.5 m² at a time) without waiting for completion of the entire area
• Dekguard products may be applied over the repair area without prior removal of the Nitobond AR curing membrane. Other curing membranes must be removed prior to the application of Dekguard products
• should be removed from tools, equipment and mixers with clean water immediately after use. Cured material can only be removed mechanically
• Yield: Approximately 12 litres / 25kg bag (approximately 1.2 m² at 10 mm thickness)

Limitations

• Should not be used when the temperature is below 5°C and falling
• should not be exposed to moving water during application
• Exposure to heavy rainfall prior to the final set may result in surface scour
• Non-flammable
• Free-fall mixers must not be used. Mixing of part bags should never be attempted
• As with other ‘one pack’ repair mortars, Renderoc S 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