Not under normal conditions. We test our benchtops using a variety of different liquids and foods (lemon juice, vinegar, mustard, wine, coffee etc.) and the bench tops show very high to complete protection against these.
We believe the high resistance to acid staining on our products is among the best of any concrete sealer available. To avoid food residue deposits on the concrete we still recommend that your bench top is cleaned after use. Please note we do not supply our sealer to anyone else.
We do not use our stain-proof sealer for outdoor pieces, see section below.