Fine to go with the zinsser approach, (bricks have gradings of mineral content = not a one size fits all) , the worry would be if you can rake out the mortar with a screwdriver i.e. it's ... failing. Stabilising solution is kinda a product name
Cheers. I assume there's also a load of breeze blocks or something behind it.
@bluehuw started
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Fine to go with the zinsser approach, (bricks have gradings of mineral content = not a one size fits all) , the worry would be if you can rake out the mortar with a screwdriver i.e. it's ... failing.
Stabilising solution is kinda a product name