Fosroc Renderoc FC bd Price

Single component polymer modified cementitious fairing coat conforming to the requirements of BS EN 1504-3 Class R2Fortimix Construction

Description:

Fosroc Renderoc FC is designed for vertical and overhead use to infill honeycombing and voids up to 3 mm deep in the surface of concrete which is not trafficked and is subsequently coated. Fosroc Renderoc FC is 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.The material is based on a blend of cements, graded aggregates, special fillers and chemical additives to provide a material with good handling characteristics, while minimizing water demand. The product exhibits excellent thermal compatibility with concrete and is fully compatible with other Renderoc mortars and Dekguard coatings.

Uses:

Fosroc Renderoc FC is designed for application in thin layers to produce a fair-faced appearance to concrete surfaces 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. Where higher compressive strengths and low permeability characteristics are required, Renderoc RP 252 or Renderoc ST05 should be used.Fosroc Renderoc FC can also be used in association with other Renderoc mortars.Fosroc Renderoc FC is suitable for repair method 3.1 as defined by BS EN 15043.

Advantages:

• 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

Standards compliance:

Renderoc FC complies with the class R2 according to EN1504-3, repair method 3.1.

Properties

The following results were obtained at a water : powder ratio of 0.27 and at a temperature of 20°C unless otherwise stated.Clarification of property values: The typical properties given above are derived from laboratory testing. Results derived from field applied samples may vary.

Application instructions

Preparation

Clean the surface and remove any dust, unsound material, plaster, oil, paint, grease, corrosion deposits or algae. Roughen the surface to remove any laitance and expose the fine aggregate by light scrabbling or grit-blasting. Oil and grease deposits should be removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser. The effectiveness of decontamination should then be assessed by a pull-off test. Renderoc repair mortars require no additional preparation prior to the application of Fosroc Renderoc FC.No independent priming system is required. The cleaned areas should be blown clean with oil-free compressed air before continuing. All prepared areas should be saturated surface dry immediately before the application of Renderoc FC, i.e. they should be thoroughly saturated with clean water and any residual surface water removed. Under severe drying conditions repeated soaking may be necessary to ensure the substrate is still saturated at the time of application.

Mixing:

Care should be taken to ensure that Fosroc Renderoc FC 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. If mixing small quantities, use a balance to weigh out the required quantity of Renderoc FC.Water must be measured in a proportion between 0.26 and 0.28 of the weight of the powder. E.g. for 10kg powder, use between 2.6 and 2.8 liters of water. 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. For larger volumes, place 6.5- 7.0 liters of drinking quality water into the mixer and, with the machine in operation, add one full 25 kg bag of Renderoc FC and mix for a minimum of 3 minutes (maximum 5 minutes).Dependent on the ambient temperature and the desired consistency, the amount of water required may vary slightly but should not exceed 7.0 liters per 25 kg bag of Renderoc FC. Do not subsequently re-temper with extra water. Note: that in all cases Renderoc FC powder must be added to water.

Estimating Supply

Packing Size: 

Fosroc Renderoc FC: 25 kg bags                 Nitobond AR: 5 and 25 litre drums

Coverage and yield:

Fosroc Renderoc FC:                                    Approx. 15.0 litres / 25 kg bag (5 m² at 3 mm thickness)Nitobond AR: 6 - 8 m2/ litre

Curing:

Renderoc FC does not require any form of curing in moderate ambient conditions, but under strong drying conditions (e.g.high winds) curing may be necessary. In this case Renderoc FC should be cured immediately after finishing in accordance with good concrete practice. The use of Nitobond AR, sprayed on to the surface of the finished Renderoc FC 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. In very fast drying conditions, supplementary curing with polythene sheeting taped down at the edges should be used.

Storage:

The product has a shelf life of 12 months from the date of manufacture if kept in dry storage in the original, unopened bags. If stored at high temperatures and/or high humidity the shelf life may be reduced to less than 6 months. Contact