Patio Black Spot Remover Plus
Patio Black Spot Remover Plus is a very powerful cleaning agent which specifically removes black spot lichen. This product is X5 stronger than normal patio cleaners & black spot removers. Excellent for cleaning Indian sandstones and Yorkshire sandstone flags. 5 star reviews on Trustpilot and Amazon on this product. Also available in an economical 20 litre deal – Free standard delivery to mainland UK addresses. Read our blog article on how to remove black spot from sandstone patios & pavers, Click Here.
Frequently asked questions
Apply the product neat and allow to dwell for at least an hour – extend the dwell time if required. Repeat the process if required.
A build up that has taken 10 years to form will be more difficult to remove that a single years growth!
Please read our blog article about removing black spot from sandstone patios click here.
The black spot remover takes up to an hour to start to work. It can be less if the contamination is light.
Extend the dwell time if required – a severe infestation may require extended dwell times. You may wish to repeat the process.
Approximately 20m2 from a 5 litre container. The product can also be bought in an economic 2o litre bundle deal.
They are lichens and they are almost impossible to remove by jet washing.
Add more product so the surface is visibly wet.
Dwell time is very important – Extend the dwell time up to 4 hours, keep the product/surface wet and agitate periodically.
A single very long dwell time can be more effective than trying to repeat the process on multiple occasions with shorter dwell times.
You have not carried out a test patch! By using a test patch you have the information to remove the black spot.
- You may have exceeded the coverage rate of no more than 20m2 per 5 litre container.
- Keep the surface wet, the product is to be applied so the surface is visibly wet.
- You will know when the product is working as black spot often starts to turn grey or white.
- Dwell time is critical – extend up to 4 hours if required.
- Do not let the product dry out.
- Repeat the process for very heavy build ups.
When wetting out the area to be treated also wet out the surrounding bedding pants and lawns. The product will be diluted if it mists over these areas and loses its strength.
The way a black spot is neutralised is by adding more water to dilute. It has no residual effect when dry. It is a contact product and will not continue to work when dry, it is not a biocide.
Yes, click the link below to have a look at a blog article about the removal of black spot.
Steven H –
Totally transformed my Twenty year old Patio. I thought I would have one last try to remove the black spots before giving up and replacing the paving completely but thanks to this product My Patio looks great and it has saved me a fortune not having to buy a new one. Well worth the money because cheaper products simply didn’t work.
Susan Reeve –
Haven’t used the item yet but if it’s as good as their customer service then I’ll be very pleased. Helpful staff and quick free delivery.
graeme –
Thanks for the review and the time taken to send one.
Dilys Grindley –
We used this product this morning on our patio,the results were amazing.Flags returned to their original colour.
Very pleased.Next day delivery great.
graeme –
Thank-you for such a positive review!
Tony E –
My review is almost identical to that of Steven H. Our terrace has been down around twenty years and due to the blackspot on the sandstone slabs and surrounding wall we were thinking about a complete overhaul. Decided that it was worth the £120 to see if the chemical would make a difference. Delivery came the next day after ordering. Absolutely incredible results. Wall is back to the original bathstone colour and Indian sandstone paving stones are blackspot free. Have some great before/after photos which we’ve been sending out to all our family. Can recommend 100%. Many thanks.
graeme –
Thank-you for such a great review – it is appreciated, glad you liked the product.
Olivia Heywood –
Unbelievably good. I have never had a sandstone terrace before and did not know what to do about the black marks that had appeared. Scrubbing and pressure washer did not shift them but this amazing product cleared them all up in under one hour – so quick and easy to use and brilliant results. I am so grateful and want everyone who has the same issue to know about it!
graeme –
Thank-you for a great review it is appreciated.
Paul Derbyshire –
First of all, let me thank-you for the excellent service. Ordered on Sunday night (in effect, Monday morning); received the order at 9.30 on Tuesday morning. I made a phone call query about the product, and was given a very comprehensive and helpful answer. Thank-you once again.
The product has now been used and is excellent. The vast majority of black spot was removed with the first application. A few stubborn spots went with the second “spot” applicaion. Overall an excellent product.
graeme –
Thank-you for such a positive review and taking the time out to write it.
David Woodward –
Rang the number and talked to someone about my black dots and lack of colour on my Indian sandstones great help did what he told me to do what a result and transformation so pleased with this product it’s looks like it did 4 years ago all the black dots have gone and the colours looks amazing used a high power jet wash at the end 10 out of 10????ps got the grandson to fine mist it when it was getting dry for 1 hour when I was drinking wine in the sunshine ???? 5 litres =18×10 foot patio area out of a watering can
Peter murphy –
My review is the same as everyone else’s. Needed the 25l size for the amount of stone I had and could not believe the results. I had used a pressure spray every couple of years but was never happy with the outcome. They now look exactly how they did when I laud them in 2003. Thank you.
Dean –
Bought some floor seal black dot remover what a product just received another order for my second patio as I was a little sceptical so only ordered 5 ltr if your after your patio to look like the day it was laid this is the product and on top of this the service is first class got some patio sealer as well not used yet if it’s as good as the remover happy days
Adrian Walter –
Like everyone else I found this product to be really effective at removing black spots from my Indian sandstone. Sadly I spent 30% more for 25% less of a competitive product before I tried this, and when I did I wasn’t confident enough to order 25litres so I’m going to have to buy some more!
One thing to note is that the instructions are correct when they say not to apply it too sparingly. We had to do a second application in some areas where it was obviously sprayed on too thinly. The other thing is, don’t wear anything you want to keep, unless you want that 60’s tie-dyed look afterwards!
June –
So pleased with this product. Read the other reviews and was encouraged and I wasn’t disappointed. It’s taken away all the black spot and brought the patio back to life. Going to use the sealer and colour intensifier as well to finish the job properly
Mrs Daines –
WOW.. This product is simply amazing. If I could give 6 stars out of 5 I would. My patio looks like the day it was laid.
I was so keen to use I forgot to wet the surface first, but I could see instantly the lichens disappear.
Amazing product. I only bought 5 litres which was a little shy of what I needed but you can see how dramatically different the untreated slabs are. I’ll be ordering more.
Scott Robson –
My Indian sandstone patio was laid about 5-6 years ago, and it has had a number of pressure washes during that time, but it was looking dull and dirty and full of black spot, which pressure washing alone doesn’t shift. I found Floorseal and thought I’d give it a go.
For a start, Graeme at Floorseal was super helpful with what I needed in terms of products and what quantity I should buy, and he was full of help and advice on the application of the products too. And the products are delivered by Fedex next day when purchased direct from Floorseal.
I started off with the Black Spot Remover, which is truly an amazing product. The instruction on the pack and the website are really good, but I also spoke to Graeme at Floorseal, who talked me through what to expect, which prepared me really well (I’m no pro at this sort of stuff, by any means!).
I used a low pressure sprayer to apply (bought on Amazon for about £10), which was super easy to use. I bought the 25L quantity for about 50 sq m of patio and had about 4L left when finished. I’m know I could’ve used less product, but as this was the first time I’ve used it, I aired on the side of caution and applied more than I needed to make sure of the coverage. Also, the 25L option is cheaper than 3x 5L tubs, so it was a no brainer for me to go for the 25L option.
The basic process was to moisten the patio, then liberally apply the Black Spot Remover. You can see it starting to work immediately, but Graeme at Floorseal was very specific to ensure a decent “dwell” time, i.e. how long the product is kept on the patio. It is important to keep the patio moist during this time, by either topping up with more product or spraying lightly with water. I chose to apply more product to keep the patio moist, which is probably why I went through so much product, but I don’t regret that at all, as the results are phenomenal.
After the product has “dwelled” for about 60 mins, I washed it off with a hose and then followed up with a pressure wash. The results were unbelievable, with all black spot gone!
I followed up with the Indian Sandstone Sealer & Colour Intensifer treatment which is a fantastic product too, which I have also reviewed.
I’m so happy with the finish and it’s brought my 5-6 year old patio back to life. I can’t recommend Floorseal’s products and company more. Thank you Floorseal.
Barbara –
27 Aug 2019. Have tried other cleaners for my block pavers and concrete paving slaps with very little effect, so wasn’t expecting very much but WOW! The block paving path was not just dirty but full of black spot and it came up like brand new…all clean and sparkly! The concrete slabbed patio was 40+ years ex council pavement slabs….with lichen, paint spots, moss and really black in places. Pressure washer took some off, but this cleaner has made it look cleaner than it’s ever been, and uniform in colour!
I’m SO pleased and can’t thank Graeme for all his help and advice too. Totally recommend Floorseal products
Les –
Blackspot what blackspot absolutely brilliant.My 3yr patio looks like it was just laid.Instructions were (excuse the pun) spot on.Graham was really helpful.I cannot praise this product enough.
Craig –
Brilliant stuff – patio looks really good again
Ben Broome –
WOW!! This product is amazing! My patio is circa 20 years old and was ridden with lichen. I’d had a professional cleaning company come and jet wash it, they tried some chemicals to no avail. I was worried about the £80 outlay but was comforted by the reviews on this website and the photos on Amazon. The response to a query from the company was very quick too. Overall incredibly impressed and I would recommend anyone to use this product!! It looks brand new again!!! 5*****
Pat Flynn –
THIS STUFF REALLY WORKS
After using some very cheap and some very expensive patio cleaners the black spots were still there. I though I would try Black Spot Remover Plus after reading some encouraging reviews. I have not been disappointed, the blacks spots I have been scrubbing with a pressure washer for 3 weeks with a scrubbing attachment have gone great. I used a garden spray to apply and left for around 2 hours then scrubbed/hosed it off, slabs look like new. This is a potent chemical be sure to wear full PPE gloves goggles wellies. Now to buy another can!!!
Lawrence Vosper –
There are so many patio cleaners on the market that it was hard to make a choice but I was delighted – and astonished – at how effective this was on both Indian sandstone and concrete slabs. I had power hosed the patio several times over the years but there were lots of black spots as well as a sort of grime. I simply watered it on (Tip: a fine rose is much more economical) and left it for a couple of hours (not very scientifically – they just looked clean by then). I then hosed it off with a power washer set on a wide spray i.e. not a power wash as such. The sandstone came up like new – really good; the concrete slabs were very good but could have done with a little longer. I’ll know next time. Generally, a first class experience. The ultimate test – my wife is very pleased too!
Gary Mason –
I have used this product today after many years of trying others. I have to say that this stuff is amazing, my sandstone patio looks better than when it was first laid.
All the the black spots and lichen has completely gone, cannot recommend enough!
Jill Harris –
Delighted with my ‘new’ patio! I can’t believe how well this product worked! I used it on both my patio and garden wall and both have come up like new!
The patio was laid and wall built around 14 years ago and over time the wall had become blackened and patio had black spots. One use of this and completely disappeared, I could actually see it disappearing in front of my eyes! Some parts were completely clear within half an hour, others took slightly longer. Quick wash down with the power washer (more a rinse/wash off than an actual clean) and all done.
Excellent service too, fast delivery and questions I had answered promptly.
Thank you
Amy Russell –
Amazing results! A must buy if you have black spot! This product came recommended by a friend, and the results have surpassed expectations. My Yorkshire stone patio was covered in black mould, with the patio colour shades of black and grey. Within a few hours, you would think it was a new patio – amazed by the results, it looks fantastic and is totally transformed!! The product covered the area quoted (20-25m) and I’ve just purchased the Natural Stone sealer, so I can ensure the black spot stays away!
iain Schofield –
The best black spot remover !!
I used Black spot remover on my Indian sand stone with excellent results. Definitely does what it says very well and will used again when / if required. I did note that i got best results when using on a none windy and none sunny day. The coverage a got was a lot more than quoted so that was great and i did constantly ensure the surface remained wet by applying more when required. So i didn’t skimp on using the product at all! So just great stuff 🙂 Have already recommenced to several friends.
I have now just purchased the Sealer and will leave a review in the next few weeks.