I have a Bristan Chrome Plated Quest Bath Shower Mixer tap and the cold tap seem to be pitting and the base appears melted or oxidised. any one ever seen this before. Tenant says it's occurred naturally. Anyone seen this before and why or how it may have occurred? What I do recall is that the plumber applied some stixall sealant under the base of the tap to prevent some water leak we noticed. I wonder if the sealant has had some corrosive effect on the chrome. I've read some polymer sealants have too much acid. Unsure if stixall sealant has that?
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