Frequently Asked Questions
Is Block Blitz safe for pets?
Yes, just keep them off the area whilst treatment is in progress and until the area is fully dry. If your pets were to get any Block Blitz solution on them, you would just need to wash the area thoroughly with cold water.
How much area will it cover?
One pouch treats approximately 15 square meters, which is around 1.5 car parking spaces.
When is the best time to apply?
Block Blitz needs to be applied to dry paving on a dry day with a clear forecast for at least 24 hours. Block Blitz can be applied any time of year at a temperature range of 0-30ºC.
Will Block Blitz leave any residue?
It may leave a white residue; this is not permanent or harmful and will gradually wash away with rainfall. Do not rinse it off.
Will it cause any damage to my grass/plants in the borders around paving?
Excessive run off can cause some localised damage to the area but it does not work like a weed killer. Try to apply Block Blitz at the highest point to control any runoff.
Is it safe to use around fish ponds?
Yes, Block Blitz is not toxic towards aquatic life. Small amounts of splashed product are okay, however try to avoid any excessive runoff as this could temporarily increase the ponds pH level.
Can I use on natural stone?
You can use on natural stone; however we would recommend that you test a small inconspicuous area of the surface to be treated to check for suitability.
Will it get rid of black spot/lichen/mould
Yes, but it may take more than one treatment. Once removed, these types of growths will not return with continued treatments.
What is the shelf life?
Block Blitz has an unlimited shelf life so it will last forever in an unopened pouch!
Is Block Blitz harmful to the environment?
Block Blitz isn’t toxic towards the environment, it quickly biodegrades and low has a low environmental impact. It contains no biocides, pesticides, herbicides or bleach.
Is Block Blitz harmful to the environment?
Block Blitz is biodegradable, eco friendly, Block Blitz isn’t toxic towards the environment. It is made from mineral and plant extracts. Contains no biocides, pesticides or bleach.
How often should I apply?
You need to apply twice a year, every 5-6 months. In the case of really bad paving to speed up results, you could treat on day one and then retreat 4 weeks later and then start with the 5 monthly cycle.
Can I use on clean paving?
Yes, start using now you will never need to jet wash/scrub/seal again.
Do I need to weed or scrub the area first?
No, apply Block Blitz and wait as it will gradually break down the dirt and debris and it will deter the weeds. You can spot treat any new stubborn organic growth and any subsequent new weed growth. You can sweep the area prior to treatment to remove any loose debris.
Will Block Blitz stop weed and moss growth?
With the recommended treatment cycle of every 5 months our products will deter up to 90% weed growth and 99% moss growth.
Will the product fully dissolve?
The more you stir it and the longer you wait before application the more it will dissolve. Some residue left in the bottom of your watering can is nothing to worry about.
Can I apply Block Blitz using a sprayer?
No, we would always recommend you apply our original products with a watering can.
What happens if it does not rain?
The longer Block Blitz sits on your paving before rainfall, the better the results. It will rain eventually, do not be tempted to hose down with tap water as the crystalised product is activated by rainfall only.
How long before I see results?
Block Blitz is not a one-off cleaning product. It is designed to slowly clean and protect paved surfaces with continued use. After the first treatment any moss will turn brown within 24-48 hours and any green algae should be removed after the first rainfall. More ingrained dirt/grime/mould/lichens will take longer and more than one treatment to disappear depending on the level of contamination. Once gone, these will not come back and you will then use Block Blitz as a preventative as part of your outdoor maintenance programme.
What surfaces can I use Block Blitz on?
A wide range of surfaces! Block paving with our Block paving treatment. Concrete, paving slabs, tarmac, resin drives, natural stone, decking both wooden and composite and rubber paving with our Multi Pave treatment. Artificial Grass with our artificial grass treatment and Gravel drives and decorative aggregates with our Gravel treatment.
Can you drive onto a treated surface?
Yes, you can drive your car or park your car onto the surface after application.
Is Block Blitz Shield only for new paving?
Block Blitz Shield is designed to be used on newly laid paving or surfaces that are no more than one year old.
Does Block Blitz Shield seal paving?
No, Block Blitz Shield does not seal paving, however, forms tiny little crystals which protect the paving structure and are reactivated every time it rains.
Does Block Blitz Shield change the colour of paving?
No, treated surfaces remain natural looking.
Is Block Blitz shield safe for pets?
Yes, however, we would recommend keeping pets off treated areas until surface has dried.
How often do I need to apply Block Blitz Shield?
We recommend treating paving twice a year.
When is best to apply?
Block Blitz Shield can be applied all year round with a temperature range of 0-30ºC.
What is the difference between Block Blitz eco and Block Blitz Pro?
Block Blitz Pro is designed to be used in a commercial environment with professional pressure spraying equipment. It is not used with a watering can.