Water resistant indoor backbox?

[Luckyboy]

Hello,

Anyone know of a water resistant backbox?
Got a very damp wall, keeps dripping into an oven switch and 2G socket outlet causing the RCD to trip.
They have repointed the brickwork outside but the wall remains damp.

 

[NozSpark]

MT do one

https://www.cef.co.uk/catalogue/pro...-box-round-corners-with-20mm-conduit-ko-white
I'm sure that other places can also get them