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Posted: Fri Aug 17, 2012 3:57 pm
by Bec@LondonStone
Hi guys,

Hope we're all enjoying this beautiful weather!! :D

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!! :)

Posted: Fri Aug 17, 2012 3:58 pm
by Bec@LondonStone

Posted: Fri Aug 17, 2012 5:15 pm
by London Stone Paving
Cue Roger

Posted: Fri Aug 17, 2012 6:13 pm
by lutonlagerlout
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

Posted: Fri Aug 17, 2012 7:07 pm
by Carberry
Sounds easier to replace them

Posted: Wed Aug 22, 2012 5:28 pm
by Bec@LondonStone
Cheers for the replies guys, I'll pass them on to the customer! x

Posted: Wed Aug 22, 2012 5:37 pm
by Bec@LondonStone
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 :)

Posted: Wed Aug 22, 2012 6:11 pm
by lutonlagerlout
i used it neat for a fast action
full PPE must be used
a whiff of the gas nearly blows your nose off
LLL

Posted: Thu Aug 23, 2012 1:11 pm
by Bec@LondonStone
Thanks LLL! Have told the customer so hopefully he will be able to sort it :)

Posted: Sat Aug 25, 2012 7:47 am
by RAPressureWashing
This product would be a better and safer option then the 32% hydrochloric acid as it is a blend of acids.

http://www.steintec.co.uk/product/175/cement_stain_remover