RonaBond FC for Prison Cells is a pre-packed fairing coat mortar which is applied as a skim coat in thicknesses up to 3mm to provide a smooth, hard finish to damaged, blemished and repaired concrete surfaces.

RonaBond FC for Prison Cells is used as a levelling mortar prior to the application of protective coatings and paints. It can also be used to give a "harder than plaster" finish to walls in, for example, prisons and detention centres. The material is supplied in preblended form which can be mixed by hand or machine in small lots.

Application is by trowel, after trowelling a dry sponge finish may be applied. It is recommended that for aesthetics reasons only RonaBond FC for Prison Cells is covered with a protective and/or decorative coating such as RonaBond Masonry Coating WB.

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• Features & Benefits
• Preparation
• Mixing
• Application
• Curing
• Working Temperatures
• Test Data

Features & Benefits

• Conforms to BS EN 1504-2
• 1mm - 3mm application thickness
• Provides a ‘harder than plaster’ finish
• Fair-faced finish on walls and soffits
• Covers minor blemishes
• Improves carbonation resistance
• Set time of less than an hour
• Apply by trowel
• Apply prior to application of surface coating

Preparation

Ensure that the surface of the concrete is clean and free from loose or friable materials. High pressure water jetting or shot blasting should be carried out to remove residues of old coatings or to key smooth surfaces. Concrete should be damp when RonaBond FC for Prison Cells is applied.

Mixing

Mix using a slow speed drill fitted with a suitable paddle attachment or a forced action mixer, never use a free fall mixer. Pour approximately two thirds of the gauging liquid into the mixing vessel and gradually add the powder component. Mix for 2 minutes and add sufficient of the remaining gauging liquid to achieve the desired consistency. Mix for a further 1 minute.

Application

Apply with a steel float to the damp concrete surface. The surface may be given a dry sponge finish.

Curing

Application in strong sunlight or windy conditions should be avoided but the use of a mist spray will prevent over-rapid drying if this is unavoidable.

Working Temperatures

RonaBond FC for Prison Cells can be used in most weather conditions and in a wide temperature range, typically from +3°C to 25°C and above. Note that at high ambient temperatures the working time of the mix will be reduced; it will be increased at lower temperatures. Ideally store materials between 10°C and 20°C before use.

Test Data

Water Permeability

ml/m²/sec

• 0-10 minutes: 0.04
10-30 minutes: 0.008 30-60 minutes: 0.004

Set Times

minutes

• Initial set: 31
• Final set: 59

Oxygen Diffusion

cm²/sec

• RonaBond FC for Prison Cells: 2 x 10-4
• Dense concrete: 1 x 10-3

Note that all quoted data is based on laboratory tests conducted at 20oC. Cubes, tested at 28 days, are 100mm and air cured. Results shown are MAXIMUM laboratory strengths achieved by casting and curing cubes in ideal working conditions; site strengths will be lower.