SmartSeal Black Limestone Sealer - 5L - Easy to Apply Black Limestone Patio Sealer. Colour Boosting Patio Sealant & Wet Look Natural Stone Sealant. Stone Restorer for Patios, Paths & Drives

What an amazing product !! After laying black limestone and cleaning lots there remained a few pitted mortar splashes (as you’d expect) and so decided to seal with a black pigment sealant. It was an amazing result !! The sealant was easy to apply with a roller, quick to dry and apply a second (and third for good measure) coat. The results are stunning, mortar marks disappeared, water simply beads on top of the stone. I looked at the price of normal sealant versus this black pigment one and the delta was so small I decided it was worth the extra cost. It isn’t cheap but I did find it goes a long way. So I will buy again for another much older weathered patio to revive that. The reviews I read before I bought this product were right, amazing product, amazing results, what’s not to love (except maybe a little cheaper would be nice - such is life).

Excellent product- easy to use with good coverage and finish. Pity is not a Prime product with next day delivery!

I'm well placed to review this product now, I initially bought it three years ago based on the reviews here. Its really good as turning the Limestone back to absolute black. Its really easy and quick to apply and dries pretty quickly too. It will splatter a bit if you're not careful but it really looks great after its applied. However, you will probably find you need to re-apply it after 2 years. I've just re-applied it as it had worn off. I think if you consider this to be something you'll do bi-annually then this is a great product. It won't however permanently fix the colour.

I read up on all the similar products on Amazon and they all had some really negative reviews which made it difficult to choose. I have bought another product before and it didn’t work which is why I was cautious. THIS PRODUCT WORKS!!! I used it on 3 very large slate slabs that had gone a pale grey colour. I used two coats leaving 3 hours in between and they have come up just like I hoped. Dark black, semi gloss finish. The product is like a solvent smelling black water. It was very easy to brush on. Because it is so thin the cement in between the slabs remain a different shade to the slabs. I didn’t want it to be like the old fashioned black step paint. The coverage was great and there is plenty to do the step for several years. It dried nicely in a couple of hours. None of these products are cheap. But it was on the cheaper side compared to others. I would buy again for sure, but I don’t need to for a while as there is loads left in the tin.

Wee bit expensive but great stuff for faded Indian slate slabs

This worked an absolute treat, even after the first coat the patio looked incredible, would highly recommend, well worth the money.

Good coverage easy to apply with a roller,I used a mini roller on a pole and did a small area at a time taking care not to over apply it as it’s very runny good finish

I bought a sample tin to try out first of all which cost £7.99. I applied the sealant to a spare patio slap which had broken and based on the results I decided to purchase a 5 litre container at £69.95. My patio is about 32 square metres in size and the 5 litre tin applied one coat to the entire patio and steps with a tiny bit left over. I’ve ordered another 5 litre tin to do my path and to apply a second coat to the patio but only to areas where I think it could do with a touch up. I’m pleased and surprised with the results. My limestone slabs were starting to fade despite only being laid 12 months ago. I’ve attached before and after photos to show the results. I will explain them later. I applied the sealant with a 1 inch brush to paint the joints and a six inch roller to cover the stone surfaces. The job was spread over a couple of days because of our wonderful temperamental weather. The total duration to seal the patio took 4 hours overall. I had to return to a small area by the back door to apply sealant when everybody was out for the day. There is an odour with the sealant but when working out doors it’s fine and the smell does go away quickly once applied. So on to the photos. I’ve taken a few of the patio to show how it used to look and to give you an idea of the area. Then I’ve taken some photos to contrast between the old and new. A few of the photos were taken a day after I’d completed most of the coverage and we’d had heavy rain over night. You can see how the water pools and beads on the patio surface. One of the photos shows a close up of a small area by our back door which I had to do when nobody was home but you can see the difference between the old and new colour. I be taken a close up photo of this section to show the deep black colour once applied. I hope these photos and descriptions are helpful to form an opinion on how effective the product is. As I mentioned earlier I’ve ordered another 5 litre container to do my limestone path next and will post more photos before and after once I’ve been able to do the job. While at first I thought the product was expensive the fact I’ve ordered it again tells you I’m satisfied with and importantly very happy with the finish. More importantly my wife likes it and as the saying goes - happy wife, happy life.