Free Delivery
On Orders Over 75*
#1 Top rated cleaning supplier
on trustpilot
UK Manufactured
since 2008
Product Reviews
By Gerard Durcan

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

By Bernadette Howells

What an amazing product! We only bought the sample size, but will definitely be purchasing the 5 litre now as we want to bring back to life our Black Limestone Patio, which over the winter turned a very pale grey! It's going to make such a huge difference to our garden and will be a great contrast colour next to the new Astroturf!

By Andrew Janes

Very pleased with the product. Used two coats (essential) on black limestone patio that had turned much lighter grey with darker spots. Applied carefully by roller as had to avoid ivory grout, also gives a more even coat than with a brush. The patio now looks an even colour with a slightly wet look finish, hope this depth of colour will stay like this for as long as possible - the longevity is my only concern. Bought 5l to cover 40m3, still half left.

Wish to leave a review?
Write a review
Your Rating:
* All submissions will be checked by our administration team before appearing on the site. Please be patient as we will try and approve your comments as quickly as possible.

Black Limestone Sealer (Sample, 1L, 5L & Bundles)

Easy to Apply, Hardwearing Solvent-based Sealer and Re-Colourant - Transforms, Re-Colours, Seals Tired LIMESTONE & SLATE Highly Effective & Durable

In Stock
Please select a size
Visa Electron
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.

Product FAQs

Q: How long does the patio sealer last for?

Marilyn Hawkey

A: The Black Limestone Sealer will last 3-5 years on average if 2 coats have been applied.

Response from Christie

Q: Can this be used on honed slate?


A: It should be ok, but we would recommend trying a sample 1st to check the sealer can penetrate into the slate correctly and adhere to the surface.

Response from Nigel

Q: Can I change a cream tiled limestone bathroom to grey with a sealer or stain ?


A: We do not supply a sealer that would re colour internal cream coloured limestone. Sorry.

Response from
Ask Us A Question
Send us a question


  • 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.


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.

Share this product