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Topic: Radical idea for sealing indian sandstone, Sealing sandstone< Next Oldest | Next Newest >
Salv
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Posted: 11 July 2018,23:41 QUOTE

Hi guys, I've had Indian sandstone patio/paving outside for the last 10yrs or so and have periodically sealed it over the years using different sealers and impregnators to try and prevent staining. Despite its age it still looks pretty good after a jet wash.

However even with my best efforts, in between applications when the product starts wearing off it's accumulated a few oil marks here and there, mainly from a combo of BBQs and kids.

Looking over these stains recently a thought struck me, could I not just use some sort of oil to impregnate/seal the slabs to 'avoid' further staining?

Stay with me here while I explain my rationale. Once oil or grease get on the slabs it tends to darken the colour, which I don't actually mind, it's more the contrast of matt stone with oil stain on that bugs me, which got me thinking if the whole slab is coated in oil, one, it would act as a barrier, and two, you wouldn't notice any new stains as much, possibly?

I'm thinking something along the lines of a mineral oil or linseed oil. I tried googling to see if anyone else has tried this but results tend to speak about slate and granite.

So I suppose what I would like to hear is if anybody has any experience with this? Any suggestions or comments? (other than I'm nuts) :)
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lutonlagerlout
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Posted: 12 July 2018,06:20 QUOTE

sealants are a combination of plant or fossil fuel based oils,I know most wood sealers are a combination of plant oils
give it a crack if you are happy if it goes wonky
:)
LLL


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mike builder/landscaper
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Posted: 12 July 2018,06:36 QUOTE

You could try it on an area that’s out of the way first,,then leave it a couple of days to see how it dry’s/looks. Take some pictures n let’s see how you get on.

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m.atkinson
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R&A Pressure Washing
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Posted: 13 July 2018,06:45 QUOTE

No, stick with a paving sealer designed for the job. If after ex amount of years, and you have been using different sealers etc, then really it is going to need to be stripped back and re-sealed using an impregnating sealer.

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Roger Oakley BDA(Europe)Member 2006
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info@rapressurewashing.co.uk
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Salv
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Posted: 16 July 2018,16:34 QUOTE

Hi R&A Pressure Washing, you obviously have more knowledge on this than me so just wondering what your reasons are for advising against it?

I have some slabs leftover tucked down the side of the garage, was going to pressure wash them and try a few different oils out on those and see how it turns out (they've never been treated with anything).

Failing that, do you have any recommendations for a long-lasting impregnating sealer?

I find that the stuff I use (resiblock), by the second year it's pretty much worn off and for the price you pay I really would expect it to last longer (2 coats).

I can't see that it would need stripping back to be honest as it's pretty much just bare stone all over. The only places I can see any remains of it are where it's pooled in a shallow area - the slabs are rough hewn/textured finish, not flat polished.
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R&A Pressure Washing
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Posted: 16 July 2018,17:46 QUOTE

Yes I do have experience with natural stone cleaning & sealing, The reason you do a strip after using any previous sealer as there might not be any left on the surface but will be in the capillaries, and this could & can cause a fail of the new sealer, preparation is everything. 2 Years is about right for the Resiblock sealer before cleaning and topping up the sealer, 18 months-2 years is about right for most impregnating sealers even the expensive ones.
Linseed oil will go black very quickly, as I said in previous reply stick to a sealer made for natural stone preferably an impregnating sealer.


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Roger Oakley BDA(Europe)Member 2006
R&A Pressure Washing Services Ltd
info@rapressurewashing.co.uk
www.rapressurewashing.co.uk
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ResiblockBoss
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Posted: 20 July 2018,09:24 QUOTE

Hi Salv
Resiblock Indian Sandstone Enhancer (a sealer) will last 3-5 years.
Resiblock Indian Sandstone Invisible (an impregnator) will last 1-2 years

If you have an experience other than that - something is amiss. In which case PM me with your phone number and address and I will get one of my team to investigate the matter immediately.
Craig


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ResiblockBoss
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