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• Features & Benefits
• Surface Preparation
• Mixing
• Application
• Test Results
• Standard Compliance
• Limitations

Features & Benefits

• Areas of use include:
• Warehouse
• Areas where strong chemicals are used or stored
• Floors, ramps and steps
• Concrete, metal, brick, masonry
• Interior and exterior
• Resists 95% sulphuric acid
• Virtually indestructible and non-dusting
• Repairs can be feather edged
• Ready for traffic in six hours
• Easy to apply
• Resin rich blend of specially selected finely graded aggregate and epoxy resin

Surface Preparation

Surfaces should be clean, dry and free of all loose material. Wire brushing or sweeping is generally sufficient. Watco Bio-D degreaser can be used to remove grease and oil.

A primer is not usually required if patch or crack repairing. Watco Tack Coat adhesive primer is recommended when applying Concrex Acid Strength as a thin section screed or when applying to smooth, non-porous or metal surfaces, or if the surface is damp.

Mixing

Each pack of Concrex Acid Strength contains aggregate pre-blended with resin and the curing agent. If the entire pack cannot be used within 30-60 minutes the products can be part mixed.

To split a pack, carefully halve the aggregate/resin mix (ideally divide it by weight) and use half the number of curing agent bottles or tins. Do not split the contents of a curing agent bottle or tin. Do not mix inside the plastic bucket. Wear protective gloves.

Tip the aggregate on to a mixing tray or board. Shake the bottles or tins of curing agent thoroughly until the liquid is a uniform colour. Form the aggregate into a mound and leave a small hole in the middle. Empty the curing agent into the hole, ensuring the bottles or tins are completely drained.

Carefully mix the aggregate with the curing agent using a trowel until a smooth mortar is obtained, this will take several minutes. The more thorough the mixing, the ‘wetter’, smoother and more manageable the mix becomes. Alternatively, you can knead the mixture by hand, but you must wear suitable gloves. It is important to mix thoroughly until you achieve a consistent colour. Machinery such as a ‘Cretangle’ mixer or suitable open pan mixer can be used to ensure thorough mixing of large quantities. Once mixed, the product is trowelled firmly against the surface to be repaired and finished with a steel trowel or float.

Application

Trowel firmly against the surface to be repaired, and finish with a trowel or float. To prevent ‘drag’ on the trowel, moisten a rag with white spirit and wipe it across the blade which will allow you to create a smooth finish. Concrex Acid Strength is normally applied in thicknesses of 5mm - 50mm, but repairs can be feather-edged for a neat finish, as long as the majority of the repair is at least 5mm thick. For repairs deeper than 50mm, apply in separate layers (allow 6 - 8 hours between layers for curing) or use Watco Concrex Deep Fill (which can be applied 15mm -100mm thick in one layer). There is no need to reapply Watco Tack Coat if building up in layers.

Equipment used for mixing and applying should be wiped clean with white spirit or a similar solvent before the Concrex Acid Strength cures.

Test Results

Chemical Resistance

*Good **Excellent

Limitations

• Food products must be removed from the area during application and cure
• Do not steam clean or subject the finished Concrex Acid Strength repair to temperatures above 60°C