Black Spot remover works very well on Porcelain, Limestone, Sandstone paving slabs and brick or masonry surfaces. A Power Washer or a garden hose with a high-pressure head. Use a watering can rose if you have one to spread the Black Spot Remover evenly. 1 litre of Black Spot Remover should cover 5m2 of patio.
Next, mix equal parts bleach and water in a bucket. Once the bleach has been diluted, pour it onto your slabs and leave it to sit for 15-30 minutes. You can then start to brush the surface or, use a power washer to ensure there is no bleach residue left over that could stain the paving.
Black spots appear when mould and algae have settled into the pores of the paving stones, but before you reach for one of the best patio cleaners on the market and get stuck into how to clean a patio, it's worth considering how to avoid the issue occurring in the first place, and it can help to have a good drainage ...
This is a common problem. It could either be mildew, or a reaction from tannin in the wood. Given that you have black residue on rocks, it may be mildew. If the rocks/stones are near the deck/pergola, it may just be stained water dripping on to them and then staining them.
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. Rinse the surface thoroughly after washing with the soap solution and dry with a soft cloth. Change the rinse water frequently.
Apply a paste of baking soda and water over the stain and leave it for 24 hours. Gently scrub the area and rinse it with plain water. Stains on Sandstone pavers, Travertine floor tiles, and Marble floors can easily be cleaned with a baking soda solution.
Stontex Black Spot Remover is a professional grade outdoor cleaner which eliminates all traces of stubborn grey lichen and black spots from all masonry and stone surfaces. This one off treatment eradicates black spots and algae with ease.
You want to gently wipe away any soot or dirt from your fireplace, not strip it of any character! To make your cleaning solution, simply mix 3 parts water to 1 part liquid dishwashing detergent and mix well. If you have a stubborn stain that just won't budge, try a hydrochloric acid solution.
Black spot is lichen which thrives on stone surfaces in the damp and shady conditions that are so common in the UK.
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.
Black stains on stone are quite often caused by a cyanobacteria (Gloeocapsa sp. that not only stain the stone black, but also increase water absorption by penetrating veins in the stone (or marble, for example) leading to honeycomb weathering damage to the stonework.
Sanding and chiselling will leave unsightly marks on your paving, bleaching can work well but you have to be careful not to kill your plants and dilute your bleach to the correct level, some people recommend using this method only in the winter months to avoid damage to plants but you still need to be really careful ...
Clean gently with a soft, liquid cleanser with bleach OR household detergent OR ammonia OR mineral spirits OR acetone. (coffee, tea, fruit, tobacco, paper, food, urine, leaves, bark, bird droppings) May cause a pinkish-brown stain and may disappear after the source of the stain has been removed.
Whilst vinegar will not directly dissolve concrete itself, but it will degrade the cement that binds your concrete slabs or flags together. Extended exposure to vinegar will also cause any polish or sealant on your pavers to erode over time, leading to bleaching, stains and weathering.
For soot-covered or tarnished tools, simply wipe down your fireplace tools and accessories with a water and Dawn® Platinum solution. This can help remove grime and soot; regularly wiping down your tools can help prevent the need for heavy scrubbing.
Dish detergent with degreaser fights oily soot stains, but you should avoid soap with granules to prevent scratches. White vinegar and water (one part warm water to three parts vinegar) break down soot stains.
Use your clean cloth & hydrogen peroxide to lift the remaining soot stain. Remove the solvent by blotting with a clean cloth until absorbed. We don't recommend scrubbing as this can spread stains deeper into carpet fibers.
On granite, sandstone, slate, or quartzite, you can use a 1/2 teaspoon of hydrogen peroxide or a few drops of ammonia directly on the stain and remove it with a damp cloth. Use your normal cleaning solution on marble, limestone, onyx, or travertine.
Wash patio slabs with white vinegar
This eco-friendly solution is made up of equal parts vinegar and water, which is then left to soak into the patio to correct any discolouration and also remove tough marks.
Magic Erasers are bad for natural stone surfaces
Magic Erasers will damage your natural stone countertop or even your floor. If you have polished marble or granite countertops, or even natural stone tile, don't use a Magic Eraser to clean it, according to Countertop Specialty.
Diluted hydrogen peroxide works well on Sandstone, Marble, Bluestone, and Travertine. In the case of Granite floor, simply brush the area in dry condition. No solution is required to cleanse moulds or algae from Granite floor.
The simplest answer is no, it is best to avoid bleach when cleaning any type of natural stone. Many home cleaning products, particularly bleach and vinegar, are too harsh or acidic to be on natural stone. These cleaners strip down the stone and leave it in a weak, damaged state.