Page 1 of 1
Posted: Thu Jul 07, 2016 7:07 am
by mickavalon
Hi
Not been on here for a while, so I thought I'd come up with a topic to gently ease myself back in, LOL!!! We've just finished a garden for a client, and in the process of the job, we managed(royal we) to get a few cement spots here and there on the clients drive. During the clean up, WE(ahem) got a little bit enthusiastic with diluted Brick acid, and while it removed the stains, it then ran over the surface, before being cleaned properly, which has left very nice tide mark where the acid dried(I guess), it isn't hugely noticeable, and I'm going over to give the whole surface a wash down and re-sand, but it does show. Any tips or do I just have to try and treat the whole surface to get the same look. I'd say the marks now cover 25% of the driveway!!! 
Posted: Thu Jul 07, 2016 7:23 am
by seanandruby
oops Mick
We all f@#$ up from time to time ( royal we ) :;):
Posted: Thu Jul 07, 2016 12:44 pm
by Tony McC
If it's sandstone, then sometoimes, and it really is only *sometimes*, one of the really good rust removers can help remove or lessen the noticeability of the staining.
However, if it's limestone, as Sean so eloquently and succinctly put it, you're f@#$ed!
Posted: Thu Jul 07, 2016 6:21 pm
by mickavalon
No there standard 200x100 charcoal block pavers, sorry should've said. The runs have given them back their colour, as opposed to the unmarked around them...they actually look better!
Posted: Sun Jul 10, 2016 12:25 pm
by Tony McC
Concrete pigments (most of 'em, anyway) are based on iron oxides, and acid frees the iron, which can make the colour appear stronger.
It's sometimes a temporary effect.....
Posted: Mon Jul 11, 2016 7:28 am
by mickavalon
So shall I wash the rest over with the same solution, or let be?
Posted: Tue Jul 12, 2016 12:31 pm
by Tony McC
I'd let it be. I really, REALLY don't like using acid with any form of paving - it's just so bleeding unpredictable!
Posted: Tue Jul 12, 2016 1:16 pm
by mickavalon
I'm going to chance giving it a good clean with the washer and see if it just wasn't done properly first time round. It really doesn't look to bad...just different:rock:
Posted: Wed Jul 20, 2016 1:04 pm
by Azpects
mickavalon wrote:Hi
Not been on here for a while, so I thought I'd come up with a topic to gently ease myself back in, LOL!!! We've just finished a garden for a client, and in the process of the job, we managed(royal we) to get a few cement spots here and there on the clients drive. During the clean up, WE(ahem) got a little bit enthusiastic with diluted Brick acid, and while it removed the stains, it then ran over the surface, before being cleaned properly, which has left very nice tide mark where the acid dried(I guess), it isn't hugely noticeable, and I'm going over to give the whole surface a wash down and re-sand, but it does show. Any tips or do I just have to try and treat the whole surface to get the same look. I'd say the marks now cover 25% of the driveway!!!
We make a product to remove mortar stains, it's specially formulated to be gentle to paving
http://www.azpects.co.uk/products/easy-mortar-stain-remover.aspx
Posted: Thu Jul 21, 2016 7:00 am
by mickavalon
Cheers Mr Azpects, we use a few of your products, Eazi joint being the main. I'll see if my supplier will get some in, although availability is an issue here in Brum. Who's your best stockist around here?
Posted: Thu Jul 21, 2016 9:16 am
by Tony McC
Azpects wrote:We make a product to remove mortar stains, it's specially formulated to be gentle to paving
Out of interest, have you tested this on the worrisome Indian sandstones?
Posted: Wed Aug 03, 2016 12:17 pm
by Azpects
Tony McC wrote:Azpects wrote:We make a product to remove mortar stains, it's specially formulated to be gentle to paving
Out of interest, have you tested this on the worrisome Indian sandstones?
Hi Tony,
As is the nature of stone, we can't test it on every single type, it varies so much
We'd always recommend testing it on a sample area before going ahead
Posted: Wed Aug 03, 2016 6:38 pm
by Tony McC
Furry nuff, but I'd expect it to have been tested on the more popular stone, say Kandla Grey, Raj Green, Modak, Camel, <spit> Mint, and the like to see if there were any definite no-noes.
Posted: Mon Sep 05, 2016 12:55 pm
by Azpects
Tony McC wrote:Furry nuff, but I'd expect it to have been tested on the more popular stone, say Kandla Grey, Raj Green, Modak, Camel, <spit> Mint, and the like to see if there were any definite no-noes.
It should be fine for most natural stones but again we always recommend a test area before completely blitzing a patio with it.
Limestone is the main exception, the same material it is designed to remove is present in Limestone itself so it's not an ideal solution.
It's a different product to brick acid, which seems to cause more problems than solutions in our experience, whether it's agitating iron deposits in stone, bleaching a stone or even stripping off the top layer all together.