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Question DetailsAsked on 5/8/2015

can epsom salt damage a refinnished tub

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1 Answer


Unfortunately yes - at a minimum it leaves a residue that is hard to clean off because it is not real water soluble when mixed with minerals in the water, so commonly takes vinegar or such to remove. Can also leave a yellowish stain.

Worse, it is abrasive - both when undissolved as crystals, and also even after because it commonly has some trace other minerals in it - basically rock dust - that can abrade the bottom of the tub, and also the sides when clearing off the residue. Probably not terrible, but sort of like using abrasive tub cleaner in the tub probably.

Then the worst part - it will dissolve some finishes, causing major flaking and bubbling of the paint. It is actually used as a component in some commercial metal stripping compounds. Generally not highly aggressive against original baked-on enamel finishes on iron tubs, but can aggressively attack some refinish paints, and gradually corrodes exposed metal like drains and such.

And I would recommend against ever using in a jetted tub like a Jacuzzi or Hot Tub - I know some manufacturers specifically warn against that in the user manual.

Bottom line - I would not worry much with a factory fired enamel or probably not an epoxy either, but would not use with a refinish job without the refinish company putting IN WRITING that it is OK and will not damage the tub.

Answered 5 years ago by LCD

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