Removing Efflorescence

The removal of efflorescent salts is relatively easy compared to some other stains. Efflorescent salts are water soluble and generally will disappear of their own accord with normal weathering. This is particularly true of "new-building bloom". White efflorescent salts can be removed by dry brushing or with clear water and a stiff brush. Heavy accumulation or stubborn deposits of white efflorescent salts may be removed with a proprietary cleaner. It is imperative that the wall be saturated before and after the solution is applied.

- from the Brick Institute of America, technical notes 20

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Care and Maintenance
Technical Bulletin #33, from the Cast Stone Institute.

Efflorescence
Nature, sources, and treatment, from the Canadian Building Digest.

Efflorescence
Causes, removal, and prevention, from Granite Rock Company.

Efflorescence, Causes and Mechanisms
From the Brick Institute of America.

Technical Notes 23
Technical Notes 23A

Efflorescence and Masonry
Cause, conditions, and removal techniques, from SaverSystems.

Efflorescence - Solving The Problem
From Tim Carter at Ask the Builder.

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Commercial Cleaners / Removers

Aldon Chemical
Envirosafe Manufacturing