Problem Solver - Concrete Block
Problem
Concrete blocks are made from cast concrete, e.g. Portland cement and aggregate, usually sand and fine gravel for high-density blocks. If left untreated, the surface can degrade.
Stages
Stage 1 - Preparation
Dry brush the surface down using a stiff bristle brush to remove any loose materials
If any mould or mildew is apparent, treat with a suitable fungicidal solution, rinse again with clean water and allow to dry.
Depending on surface substrate check condition and carry out any remedial works required to make sound
Stage 2 - Basecoat
Once the surface is clean and all loose material has been removed, treat with a suitable primer and allow to dry.
Stage 3 - Topcoat
Apply an appropriate topcoat and allow to dry, followed by a 2nd coat to finish.