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Posted: Tue Aug 18, 2020 9:15 pm
by hrgiger
Hey guys,
I have some staining due to SBR on my indian stone.
Mainly from where it was used as a bonding agent on the back and some got splashed on the front..
Any ideas whats best to try and remove it?
all help much appreciated.
regards
Si
Posted: Tue Aug 18, 2020 11:05 pm
by Bob_A
It won't be easy, as Tony would soon if you spill SBR remove it immediately if not sooner.
How big are the splashes
When you say Indian stone you mean the riven sandstone stuff?
Posted: Wed Aug 19, 2020 1:27 pm
by hrgiger
Bob_A wrote:It won't be easy, as Tony would soon if you spill SBR remove it immediately if not sooner.
How big are the splashes
When you say Indian stone you mean the riven sandstone stuff?
hi, thanks for the reply.
yeah the spalshes arent to big but would still like to remove them or at lest make then less visable.
the stone is Kandla grey indian stone, sawn and honed, so its very smooth almost tile like, thats why the splashes show up more i think.
any ideas ?
reagrds
Posted: Wed Aug 19, 2020 7:48 pm
by Bob_A
If they are smooth then sorry I don't know. If they were riven I would've said hack away at it until it's gone and if done properly could've still looked riven.
Maybe someone else can help, it's been a bit quiet on here the last few days so you may to have to wait:)
Posted: Wed Aug 19, 2020 11:02 pm
by hrgiger
Bob_A wrote:If they are smooth then sorry I don't know. If they were riven I would've said hack away at it until it's gone and if done properly could've still looked riven.
Maybe someone else can help, it's been a bit quiet on here the last few days so you may to have to wait:)
thanks for looking in mate
will see if anyone else has any ideas.
regards
Posted: Fri Aug 21, 2020 7:53 pm
by Tony McC
If it's a primer, than you have very little chance of removing it without damaging the stone.
There are two elements to contend with: the SBR component which is designed to stick like the proverbial to a blanket and NOT be easily removed; and then the cementitious component which requires an acid to break its hold on the flagstone....and acid very often turns Kandla Grey into Kandla Bright Orange as it frees iron minerals within the stone.
You could try repeated, careful applications of a phosphoric acid (popular with home brewers, apparently), but a friend in Ireland with the same problem told me just a week or so ago that it took more than 20 applications to reduce the stain to 'acceptable', and that "I'm sick of doing this..." had kicked in long before any real benefit was noticed, but a persistent spouse ensured the traetment continued.
Posted: Sun Aug 23, 2020 6:33 pm
by hrgiger
Thanks Tony for the reply,
Managed to get most of the stains off to an acceptable level using Evo Stick Adhesive Remover of all things
Tried it on a bit of spare slab first and it didnt alter the stone's colour so soaking a piece rag in it and holding on the stain seemed to work well.
Basically a solvent based adhesive remover seemed to work well.
Thanks for all the replies guys,
Appreciate the help
Si
Posted: Tue Aug 25, 2020 7:02 pm
by Tony McC
Good to know! 