Centrecoat Armourcoat HF

Centrecoat ArmourCoat HF is a heavy duty, trowel applied polyurethane floor screed for use on concrete and polymer modified cementitious screeds.

Best Uses

Centrecoat ArmourCoat HF is designed with the highest order of durability, impact, abrasion and chemical resistance. Its lightly textured finish makes the product ideal for both wet and dry processing environments such as the food, beverage and chemical industries.

Centrecoat ArmourCoat HF is water based and non-tainting (Campden & Chorleywood Food Research Association test method TES-S-002).

• Stable to steam cleaning and hot water exposure at a thickness of 9 mm
• Very high chemical resistance
• Non-tainting
• Seamless
• High abrasion resistance
• Slip resistant

Provides a seamless, matt surface with a light slip resistant texture. Centrecoat ArmourCoat HF contains a white aggregate which imparts a slip resistant profile to the finished floor. When first installed, the floor has a uniform coloured surface. However, with general use, the white aggregate will begin to show through giving a decorative, mottled appearance.

Centrecoat ArmourCoat HF is resistant to a wide range of commonly used chemicals in the food, dairy and pharmaceutical industries such as concentrated citric acid (fruits), spirit vinegar (50% acetic acid), lactic acid (food & dairy products) and common alcohols (methanol & ethanol). Centrecoat ArmourCoat HF is also resistant to a wide range of inorganic acids, fuels, hydraulic oils, mineral oils and solvents.

Centrecoat ArmourCoat HF is resistant to spillages and discharges up to 70°C when applied at 6 mm thickness. When applied at 9 mm Centrecoat ArmourCoat HF is resistant to spillages and discharges up to 120°C and is fully steam cleanable. Where thermal shock is an issue, a good quality substrate is essential.

Application

Inadequate preparation will lead to loss of adhesion and failure. Grinding, light vacuum-contained shot-blasting or planing is recommended. Percussive scabbling or acid etching is not recommended. Anchorage grooves should be cut to a width and depth of twice the thickness of the floor finish at the edges, bay joints, up-stands, drains, doorways and at regular points across the floor, and all debris removed. Contact our technical team for further information.

Ensure temperatures of components during mixing are adequate - see product data sheet for full guidance.

Apply to primed areas to the required thickness using a steel float. Ensure that anchor grooves are fully wetted out with material. The cured product should be protected from other trades using Kraft paper or similar breathable material. Polythene should not be used. Protect the installed floor from damp, condensation and water for at least 4 days.

Priming
(i) Where the concrete substrate has a relative humidity of <75%
Priming should be carried out using Centrecoat MMA Multi-Use Primer taking particular care to prime but not fill the anchor grooves (see separate data sheet). Spread onto the substrate and roll with a short-haired roller to ensure even coverage until the surface is completely wetted out, taking care to avoid pooling. Apply around the edges of and into anchorage grooves by brush, to allow even spreading and avoid pooling. If, when cured, there are dry patches, a further primer coat is required. Allow to cure for a minimum 12 hours at 20ºC. If the primer has been left to cure for >48 hours, then the primer surface should be mechanically abraded and the area re-primed. Failure to do so may result in pin-holing of the surface topping.

(ii) Where the concrete substrate has a relative humidity of >75%
Centrecoat ArmourCoat HF can be applied to 7 day old concrete which is visibly dry and having a minimum tensile strength (pull-off) of 1.5 MPa. All the usual stringent surface preparation techniques should be employed. For concrete bases in contact with the ground, a damp proof membrane should have been incorporated into the slab design, in accordance with the requirements of CP102 (Code of Practice for Protection of Buildings Against Water from the Ground).

Centrecoat Armourcoat TF should be applied as a primer coat. Apply using a medium nap roller directly from a paint tray or scuttle. Push the coating well into the surface, make sure it is fully wetted out, then pull back to a tight coat with the roller. Apply around the edges of and into anchorage grooves by brush, to allow even spreading and avoid pooling. If, when cured, there are dry patches, a further primer coat is required. Allow to cure for a minimum 12 hours at 20ºC. If the primer has been left to cure for >48 hours, then the primer surface should be mechanically abraded and the area re-primed. Failure to do so may result in pin-holing of the surface topping.