how to remove acid burn on Bluestone tiles

How to remove acid burn on Bluestone Pavers

We do not recommend the use of hydrochloric acid or oxalic acid to clean Bluestone. Ask your stone specialist for advice on cleaning products if required. There are specially formulated cleaners and sealers for stone which are effective and easy to use. This project in the photo attached, was cleaned with a strong solution of hydrochloric acid then a strong solution of oxalic acid. As a result an acid burn was left on the surface of the Bluestone. This was removed with a light sand with an 80 grit sandpaper, however this process is unnecessary if the correct cleaning agents are used.

Basalt Crazy Paving Bluestone Boarder Tiles

How To Maintain Bluestone Tiles

How To Maintain Bluestone Tiles And Pavers


Bluestone tiles is so tough and hard wearing it does not need to be sealed. To aid clean up, an invisible penetrating sealer can be applied prior to grouting. Sealing also reduces mineralisation in the stone (occasional iron pyrite reacting with water).


Grout can easily be removed with a sponge and water at time of application. Do not use Hydrochloric acid to clean as this will cause minerals present in the stone to react.


Just sweep when needed. Bluestone tiles and pavers responds well to high pressure cleaning. A solution of mild detergent and water, can be applied prior to pressure cleaning.

What is Basalt(bluestone)

Basalt is a very common dark-colored volcanic rock composed of calcic plagioclase (usually labradorite), clinopyroxene (augite) and iron ore (titaniferous magnetite). Basalt may also contain olivine, quartz, hornblende, nepheline, orthopyroxene, etc. Basalt is a volcanic equivalent of gabbros.

Basalt is usually black or dark gray and relatively featureless. It is composed of mineral grains which are mostly indistinguishable to the naked eye. Basalt may also contain volcanic glass. Basalt may contain phenocrysts (larger crystals within fine-grained groundmass) and vesicules (holes that were filled by volcanic gases).

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