Black Spot Remover Plus

Apply Black Spot Remover neat and allow to dwell for up to one hour – extend the dwell time if required or repeat the process (if required).

A build-up that has taken 10 years to form will be more difficult to remove than one years growth!

Please read our blog article about removing black spot from sandstone patios; click here.

The black spot remover may take up to one hour to work. It could certainly be less if the contamination is light. Organic matter will be eliminated before the black spot, so any other patio green algae and general organic growth will be removed during the process.

Extend the dwell time if required – a severe infestation may mean extending the dwell time to beyond one hour. Carry out a small test patch, this will provide a good estimate of the dwell time required.

Approximately 20m2 from a 5 litre container. The product can also be bought in a larger economic 20 litre container which will cover up to 80m2.

They are incredibly stubborn lichens, they are impossible to remove by jet washing. To remove black spot lichen on your patio, you need to ‘kill’ the living lichen first before washing the debris away.

Add more product so the surface is visibly wet at all times during the process, do not allow the product to dry on the surface. Agitate with a brush to move the solution over the higher/raised areas of the stone. This will also to stop the fluid from simply sitting in the low areas/depressions on the surface of the paving.

Dwell time is very important – Extend the dwell if the contamination is really severe, keep the product/surface wet and agitate periodically.

A single long dwell time is more effective than repeating the process on multiple occasions with short 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 liberally applied so the surface is always 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 the dwell time if required.
• Never let the product dry out.
• Repeat the process for very heavy build ups on problematic areas on the patio.

When wetting out the area to be treated you should also wet out the surrounding bedding plants and lawns. The product will be diluted if it encounters these areas and loses its strength.

The way to neutralise black spot remover is to rinse with lots of clean water to fully dilute it. The product has no residual effect when dry. It is a contact product and will not continue to work once the surface has dried after use.

Yes, click the link below to have a look at a ‘how to’ article about the removal of black spot.

Removing black spot lichens from patios & pavers.

Floorseal Indian Sandstone Sealer & Colour Intensifier is a breathable, natural, & matt finish water-based sealer that slightly enhances colour. This product is ideal for any colourful sandstone like mint fossil, raj green, rainbow sandstone or Yorkshire sandstone flags. This product is a subtle colour enhancer.

Floorseal Natural Stone Sealer Breathe, this water-based sealer also retains a natural matt finish but does not alter the colour of the stone in any way. This product is ideal for plain grey sandstones like Kandla Grey or general monotone sandstones or any sandstone you where you would like to retain a totally natural appearance.

Floorseal Sandstone Wet Look Sealer is a solvent-based sealer which deepens colour with a slight sheen. This sealer can be applied to most types of sandstones, including plain sandstones to noticeably darken the shade/colour of the stone.

There are samples of the sealers under the select size option on the product pages.

Apply Floorseal Green Remover Concentrate a few times per year to kill green algae & prevent the return of black spot lichen. This product lingers on the surface to provide ongoing protection, preventing the germination of black spot spores.