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Do I have to use a power washer after applying the block paving cleaner?
Not always as the cleaner is highly effective. But a pressure washer at relatively low pressure will need to be used to clear the joints between the pavers.
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Will the cleaner damage the surface if left on too long before rinsing?
No, if left to long it might start to crystalise and dry white on the surface, but it will not damage the surface. If this does occur, it can be removed by either a stiff broom and water or a pressure washer.
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Does the sealer keep once opened?
We would always recommend using it as soon as possible after opening, certainly within a year.
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Matt or satin - which is best?
Very much a personal choice in terms of preferred finish, technically the matt sealer will probably be slightly harder wearing and last a bit longer.
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Will the cleaners bleach the surface or change the appearance of my patio?
No, none of our cleaning products contains acid, they will not change the appearance or remove the colour from the stone.
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What is a biocide?
In current European legislation, a biocide is defined as a chemical treatment that has been formulated to kill, destroy or have a controlling influence on an organic organism such as algae or lichen.