For the removal of cement spillage on natural stone stoneworld recommend the use of rob parkers best conclear. Muriatic acid also called hydrochloride acid diluted with water could be used to remove the cement but since sandstone is often held together with calcite or dolomitic cement which are broken down by acids muriatic acid may do more harm than good.
Using the wire brush start scrubbing the cement stains from the pavers.
How to get rid of cement stains on sandstone. Mix a solution of washing soda or a detergent in water. Proprietary cleaning materials fall into two categories general purpose and cleaners for metallic sensitive masonry. If you get mortar or cement on paving stones you can remove the stains without replacing the paving stones.
Whilst our product is manmade it mimics the glycolic acid. Simple tools and chemicals will take care of most of these stains without discolouring your paving stones. It has been formulated using a much gentler ingredient glycolic acid.
Remove material on the surface of the stone. Before using any kind of acidic cleaner it is important to test how your sandstone will react. Residual cement mortar deposits from the build process which have hardened are often dissolved away using this general use building product.
Let it stay on for about fifteen minutes. Gently brush the method of using a stiff bristled brush to gently remove dried stains and spots stain away. This entry was posted in stone paving on 21st june 2013 by london stone blog.
Mortar and concrete spatters and spills often do not set into the stone. Avoid the use of nonproprietary acids on sandstone which can damage the material irreversibly. Use a small plastic cup or a small plastic bucket to spread the acid on the cement stains.
Brick acid is often used by contractors to tidy up after the laying of a patio. One of the most important parts of patio construction is the pointing. Only cleaners for metallic sensitive surfaces should be considered.
Removing mortar stains from sandstone. Wash with clear water and allow to dry. Find out how to get rid of the stains here.
Lets just think for a minute or two about how much time effort and money goes into building a natural stone patio.