Bluestone Maintenance Guide – Sealing & Cleaning
Sealing stone has many advantages, it provides protection from stains, facilitates easy clean up, reduces the effects from chemical attack and can enhance the beauty of the stone. Sealing stone can extend its life and also reduces the effects of oxidisation by reducing the movement of water through the stone.
There are two main types of sealers, the first is an invisible penetrating type, which leaves the stone with a natural look. The second enhances the colours within the stone. The price of the sealers varies considerably according to its longevity and its application. For this reason we always suggest seeking professional advice before making the final selection.
We always suggest sealing stone around a swimming pool, this is because swimming pools can contain salts and other chemicals which can leach into the surrounding areas. There are different types of sealers for various applications.
Bluestone is so tough and hard wearing it does not need to be sealed. To aid cleanup, an invisible penetrating sealer can be applied prior to grouting. Sealing also reduces mineralisation in the stone (occasional iron pyrite reacting with water).
Clean up grouting shortly after application with a sponge and plenty of clean water. Do not allow grout to dry on the surface of the tile. Do not use hydrochloric acid to clean up grout smears.
If any grout smears remain seek professional advice before using grout removal chemicals, as some chemicals will harm the stone.
Do not use Hydrochloric acid to clean as this will cause minerals present in the stone to react.
Sweep or high pressure wash when needed. To remove dirt & stains use a solution of mild detergent, we recommend
Apply the solution on the surface & agitate the area with a stiff broom or brush prior to rinsing with water. Moss can be removed with a mild solution of household bleach and water.
Do not use hydrochloric acid to clean. When using coloured grout, always pre-seal the tiles prior to grouting, to minimise colour leaching into the tile.
Sealing also reduces mineralisation in the stone (a red colour forming on the stone as a result of iron pyrite reacting with water).
If using adhesive to increase the bond between the stone and the mortar or adhesive bed then butter a thin coat on the entire back of the tile, do not just notch trowel the back of the tile with adhesive.
For best results select tiles from different crates to ensure a blend of colour. We recommend the use of expansion joints for exterior & interior applications.