Concrete: the concrete should be allowed to have a minimum 28 days to harden, a minimal tensile strength of 1.5 N/mm² and a minimum compression resistance of 25 N/mm².
The surface must be clean, dry, free from laitance, old paints and other contaminants.
Wood: sand it following the direction of the fibres with a medium grade sand paper.
For more information see the Technical DataSheet or contact us.
