In article ,
"al" writes:

The walls are more of a concern. I know if I just paint the brick, it will
soak up like a sponge. Was wondering if the PVA would help or if I should
find something more specialised to seal it.

PVA is unsuitable for sealing for some paints (see recent thread
on this). Dilute matt emulsion generally works well, but specialsed
products are available too.

--
Andrew Gabriel