I have a customer who has laid some of our Blue/Black slate and pointed with Easipoint. The lad that did the pointing spilled a load of the Easipoint onto the paving and then tried to wipe it off with a cloth and essentially has just smeared it all over the show.
Usually I would recommend Lithofin Builder's Clean for this but they have tried brick acid scrubbed in with a stiff brush and this hasn't worked, as far as I understand these products are basically the same thing. He says that it seems to have improved the staining on a few slabs but the majority are no better.
Anybody got any ideas on the best course of action here? Thanks in advance!!
if it is slate i would try strong hydrochloric acid on a test slab first
you can get the 30% stuff from swimming pool supply shops
always pre wet any area to be acid cleaned and use PPE
(i know this because of a balls up i did the other week,i put acid onto dry slabs and it etched them immediately)
maybe apply with a sponge then wash off with lots of clean water
roger will have the definitive answer of course
LLL
Actually, one last quick question! LLL, did you dilute this 10:1? I'm guessing it can't be used neat?
Pre-wetting noted! Always best to learn from someone else's mistakes;)
Really appreciate the advice on here
