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Product Reviews
By Stephen

Not to Quote another companies product..this stuff does what is says on the tin. This black limestone sealer transformed my dull looking grey limestone to a real blackwet look.

By Paul Dishot

Fantastic sealer really transformed my patio , very happy with results

By Gerard Durcan

The black limestone sealer has transformed my old grey patio tiles into a vibrant new patio!

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Black Limestone Sealer - Transforms Re- Colours Seals and Protect

Easy to Apply, Hardwearing Solvent-Based Sealer and Colourant

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Product Description

Smartseal black limestone sealer is a highly-effective solvent-based sealer and re-colourant for black limestone which gives a transformative effect.

Limestone slabs will often fade over time and gradually turn a lighter shade of grey. The black limestone sealer can transform the look of faded limestone patios and make them look like they were recently laid. The sealer can be re-applied at any time to ensure any limestone slabs on patios or other external surfaces look good at all times.



  • 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
  • Apply by roller
  • 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.

***PLEASE NOTE*** - For best results, if a sweep-in jointing compound has been used when the slabs were laid, we would recommend using the residue remover prior to application.

Product FAQs

Q: I have recently purchased the black limestone sealer and applied the first coat to my patio. It looks great but there are dirty footprints everywhere. I want to get rid of those before applying a second coat. Is the patio cleaner extreme the best product to use? Is that harmful to cats & dogs?

Perry Mears

A: The foot prints should just clear with soapy water or a household cleaner. The Xtreme cleaner would not be required for this purpose. Hope that helps

Response from Jake

Q: Is white spirit appropriate for cleaning tools & equipment after use? If not, what would you recommend?


A: You would need to use our 'tool cleaning fluid' white spirit will not be strong enough to break down the resins in the black limestone sealer. It is best just to allow the roller to dry and store for future use. Once submerged back into the sealer for a few minutes, it will soften up, ready to be used again. Hope that helps.

Response from Nigel

Q: My black limestone slabs are very pale. I have tried your black limestone sealer, but it is too black, and the impregnating limestone sealer doesn't change the colour at all. Can I mix together? Or add water to black limestone sealer?

Marilyn Hawkey

A: Unfortunately you cannot mix both together as one is a solvent based sealer and the other is a non-solvent. The chemistries of both sealers are not compatible. You aslo cannot add water to the black limestone sealer.

Response from Nick
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We provide a national delivery service for our block paving sealer, pattern imprinted concrete sealer, roof coatings and tarmac restorer on a standard 2 - 4 working day basis. Dependent on weight, this is normally done by pallet or parcel carrier.

If you need products delivered quicker, for a small additional charge, orders placed before 1.30pm can be delivered within 1 - 2 working days to most parts of the UK, although this is dependent on the courier service in your area and the product/s ordered. If you require this service, please check on area availability by calling 01268 722500.

Our commitment is to supply all orders as placed and we offer a comprehensive guarantee of quality. Providing a reliable delivery service to all our customers is most important to us and this is backed up by the many satisfied customer testimonials we have received over the years.

If you need an order delivered to a different address, left somewhere at your property without a signature or left with a neighbour, just let us know.

We also try to maintain 100% stocking levels of our products at all times, so an immediate despatch is virtually guaranteed.

Our product returns policy can be viewed by visiting our Terms and Conditions section.

*Free delivery on orders over £75 are subject to the delivery address location.

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