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Black Limestone Sealer - 5 Litre - Highly-Effective Solvent-based Sealer and Re-Colourant

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StarStarStarStarStar 7 Reviews|(5/5)
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Customer Reviews

Our expensive natural limestone patio looked great when it was new but that look didnt last for long. After a few weeks it looked awful, even worse than grey, boring cement slabs, and we were seriously considering getting rid of it. No amount of scrubbing or jet washing made any difference. Smartseal Black Limestone Sealer totally transformed it and it looks great again. Excellent stuff.

By Ian G

Great and relatively easy to apply sealer with roller. Showed slightly patchy with long handle roller as difficult to ensure even pressure and also stone so porous that it snatched up the sealer at the first point of contact. Although it is only a one coat I ended up doing a second coat by small hand roller with better outcome. Patio stunningly different as fading of original Black Limestone was epic.

By Maralyn Yorke From Bristol

Well impressed. Applied sealer to black limestone and they instantly look a lovely shade of black. The grey look that they had has gone and they now pool water on the surface. I only had the time to apply one coat but even that looks great. Covered 15sqm with about 1/3rd of the 5l can. Well worth the money.

By David Hurst From Hensall, North Yorkshire

If I could give this product a higher rating I would, we were on verge of lifting our black slate patios until we tried this sealer and I can't praise it enough so much so we have bought 3 more tins the finish is superb thank you so much Smartseal

By Jean Miller

This black limestone sealer is fabulous, we were thinking of replacing our slate patio until we used this and the patio looks like it has just been laid. The slate was originally black and before we used this it was looking grey and horrible. Would highly recommend this product

By Jean Miller From County Durham

I have just completed sealing my large limestone patio. The patio was laid 5 years ago and started to fade within weeks of being laid. I have spent 5 years trying to find a product that returned my patio to what I wanted it to look like, spending a small fortune on products which didn't worked. I have just completed resealing my printed concrete drive with Smart seal concrete sealant, and was so pleased with the drive, that when I saw the limestone Smart seal sealant, I immediately purchased a 5 litre can, the results where spectacular so much so I immediately ordered another 15 litres, at first, I thought the products looked expensive, however the finished result was so good, it was worth the expenditure. I cannot recommend the Smart Seal products highly enough, every product has performed beyond my expectations, which I set at a high level. Lastly, I am competent at diy but no expert, followed the instructions and watched the videos, fantastic result on my drive and patio.

By Steve Hughes From Ringwood, Hampshire

Fantastic product far better than what we have used previously. Leaves a superior finish, we will definitely use again in the future.

By Joanne Emmett
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A highly-effective solvent-based sealer and re-colourant for black limestone which gives a transformative effect.


  • Clean surface using a pressure washer and/or Patio Clean Xtreme.
  • Allow to dry for a minimum of 72 hours
  • Apply above 12C with a temperature no higher than 23C
  • Two coats are recommended
  • Coverage: Average coverage approx. 4 - 5m/litre first coat (dependant on surface) and approx. 6 - 8m/litre second coat

Always apply to a test area first to determine suitability. A sample size (150 ml) is available for purchase should you wish to try it before committing to purchase 5 Litres.