Do not use Hydrochloric Acid for clean up as this can cause minerals present in the stone to react.


Sweep when needed. Natural stone responds well to low pressure water blasting. A solution of mild detergent and water can be applied prior to pressure cleaning. Spills should be wiped up immediately to avoid absorbing into the stone. For a more thorough clean we would recommend DryTreat Oxy-Cleansa.

Efflorescence is a white powder that may appear on the surface of the stone. It is caused by water carrying mineral salts from below the surface of the stone rising through the stone and evaporating. When the water evaporates, it leaves the powdery substance. If the installation is new, dust mop or vacuum the powder. You may have to do this several times as the stone dries out. Do not use water to remove the powder; it will only temporarily disappear. If the problem persists, contact your installer to help identify and remove the cause of the moisture. We highly recommend sealing the stone prior to installation to avoid moisture build up and to prevent Efflorescence.  See our Sealing section for more info.

Rust in Bluestone/Basalt
Sometimes, iron particles within Bluestone can come to the surface causing brown patches, usually along the grout lines, we call these rust stains.  To remove, we recommend using DryTreat Eff-Erayza.

Please note, we are not a stockist of DryTreat, we purchase it on behalf of our customers and hold some products in stock.  To order direct, please contact Lustre.

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