Andrew Gabriel wrote:
In article . com,
writes:
Pete C wrote:
While the grout is out you could try getting some exterior PVA in
between the tiles to help seal any cracks in the tile cement.

Thanks. How long does the PVA need to dry? Goes the grout stick to the
PVA well? Do Wickes, etc, sell exterior grade PVA.

Exterior PVA (EVA) is only waterproof when mixed in cement/mortar.
I don't think it will do much good painted on like that.

Use a waterproofing additive in the grout, such as BAL Admix GT1
(which probably contains EVA and plasticiser).

--
Andrew Gabriel

Would pre-mixed lablelled "waterproof" grout be suitable. It that
pre-mixed to the right formula? Does it do what they say? Will it keep
water out? I was told and read that normal grout is not waterproof.

The "Goes" in my post above is a typo, it should be "Does".