Floorseal Black Spot Remover Plus is suitable for removing black spot lichens from natural stone, brick, concrete and block pavers. To carry out lichen removal from a patio, you simply need dwell time and agitation to achieve optimal results.
Simply put, black stains on flagstones are caused by certain types of mold and mildew. These fungi find their way onto the stones either from their spores landing on the stones or from simply extending onto the stones from patches of mold or mildew right beside them—a pretty common occurrence for garden pavers.
The patio black spots that grow on your garden stonework are actually spots of black lichen. The spores from the black lichen start life as tiny dust-like spores growing on the underside of leaves on trees and plants. These spores are carried, by the wind and the rain, onto your stonework in their millions.
A product such as Cleenly Black Spot Remover, which contains the active ingredient Sodium Hypochlorite which breaks lichen down, thereby enabling it to be simply rinsed away and preventing rapid regrowth.
Lichens are extremely tough to get rid of, so you'll need some specialist cleaning supplies to do the job. Look for a patio cleaner that contains sodium hypochlorite, also known as dairy bleach.
If you have dark areas of discolouration on the hard surfaces of your garden (patio, drive, paths etc) it could just be dirt so see if it can be removed with a scrub over. If it can't, and it looks like ink splatters, it's most likely to be black lichen, also known as black spot.
Wet & Forget is a safe roof cleaner that will remove lichen without any scrubbing or scraping. Wet & Forget Outdoor can also be used to remove lichen from the trunks of trees. We advise applying the Wet & Forget when the tree is in its dormant state, which is late fall.
Believe it or not, you can treat your patio with something available, cheap, and effective: bleach or the stronger compound, sodium hypochlorite. However, you have to be careful with bleach because when hosed down in surface runoff, it can kill any plants or greenery with which it comes in contact.
While researching how to remove patio black spots you may have come across “Sodium Hypochlorite” which is a very strong bleach and while it may remove black spots, it will also damage the surface of anything it comes into contact with.
Experts say they can do the trick for the patio as well. 'You can remove black spots easily from patios in an eco-friendly, low-cost way, with white vinegar,' says Laura Harnett, Founder, Seep. 'It has antifungal and antibacterial properties and will also stop the mould or lichen growing back.
1 Answer. There is a compound called cerussite or 'natural white lead' which turns to black 'lead sulphide' when it reacts with hydrogen sulphide in the atmosphere.
Clean stone surfaces with warm water and a mild soap such as a clear Dawn Liquid Soap. Do not use products that contain lemon, vinegar or other acids on marble or limestone.
Black Spot Remover contains some 'hypo' itself (less than 5%) but it performs better than neat 14 - 15% Hypo. It contains activators and wetting agents which stabilise and accelerate the performance, making it much safer to use and it won't crytalise when dry.
Black spots, otherwise known as lichen, tend to appear when mould and algae have settled into the pores of the patio slabs.
Yes, vinegar will remove lichen, but we have not seen that it removes it any better than purpose made cabriolet hood cleaners. It is a mild acid, and will kill a lot of organic organisms and may even help to break them down, but it isn't a particularly good shampoo and won't wash away the lichen like magic.
Crustose Lichens
They form a crust over a surface, like a boulder, the soil, a car, or your roof shingles. They can come in many bright, vibrant colors like sunny yellow, orange, and red, as well as grays and greens. Crustose lichens are pressed against their substrate. Many colorful crusts on a rock.
This product really does work by just spraying and forgetting. We had some very old mildew stains on our house and Spray & Forget got rid of practically all of them. Left some discoloration but that looks much better than what was there.
A solution of one cup bleach to four litres of water should do the trick. However,some stones may be discoloured by this so it is best to do a test run first. Another option is to use an undiluted five per cent white vinegar solution. Simply apply to the pavers and scrub with a soft-bristled brush.
Patio Magic contains a fungicide that will kill off the following: Lichens (mostly black spots, sometimes white, on patios, concrete and blocks). Mould. Algae.
Lichen but more commonly referred to as Black spot is a common problem that can affect patios and other outdoor stone surfaces. These issues not only look unsightly, but when left untreated they can also damage the surface over time.