rshandyman
Well-known member
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At what ratio should I mix water with hypo to spray slabs without damaging them?
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Another way I have used is to saturate the slabs with water, then brush on undiluted Hypo.
How long are you leaving it to dwell for? You can leave it to dwell longer but just make sure it don't dryI did try on these slabs 1 to 1 it did not make much difference so I sprayed neat and still not great any ideas?these slabs are very bad all with black spots..
Why can't you let it dry??
I left neat for 40 minutes and still some left maybe I should use stiff brush?