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5L Pro-Kleen Simply Spray Patio Cleaner & Algae Remover
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Product information
Specifications
Brand:
Pro-Kleen
Pack size:
5 L
Powerful Patio Cleaner
With over 250,000 bottles sold in the UK, Simply Spray & Walk Away is a top choice for tackling green mould and algae. It quickly clears slippery growths on patios, paths, and decking, while removing dirt and grime - revitalising your garden.
Kills Green Mould and Algae
Say goodbye to slippery surfaces! This powerful formula kills green mould and algae, making them easy to rinse or brush away.
Stops Regrowth
This formula creates a protection barrier that will protect against the re-growth of mould and algae for up to 6 months.
Easy to Use
Just dilute, spray, and leave it to work—no pressure washer needed! After 2-3 days, rinse off for a bright, clean patio.
Long-Lasting
A 5L bottle makes 25L of solution, covering up to 200m². Multi-pack discounts are available for even better value.
Versatile
Works on patios, paths, decking, fences, tarmac, glass, roofing felt, PVC, and more—even boat hulls and caravans!
Bleach-Free & Pet-Safe
Biodegradable, bleach-free, and pH neutral. This formula is safe for pets and children once dry - this makes it the perfect choice for family homes.
How to Use
- Dilute 1 part solution with 4 parts water (use neat for tough areas).
- Apply with a sprayer or watering can.
- Keep pets and children away until dry.
- In 2-3 days, green growth turns orange or brown—then rinse or brush clean.
Contains: Alkyl (C12-16) Dimethyl Benzyl Ammonium Chloride and Didecyl Dimethyl Ammonium Chloride.
Always read the label and use pesticides responsibly.
Reviews
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Paul Cottingham
Amazing product does exactly what it says .
11 Feb 2023
Mr Alan Hughes
Excellent product, does what it says on the tin.
26 Dec 2022
rita cudmore
this is probably the best on the market great price and excellent service
18 Dec 2022
Steve Davidson
Does what it says and banishes algae and moss.
Use 1:1 if area is bad first time then it’s easy from then on. Worth a pressure wash first time too.
10 Dec 2022
Douglas Burton
it does exactly what is supposed to do used it many times
6 Dec 2022
David
Brilliant product - saved me so much time when cleaning my holiday home
12 Nov 2022
jk
Amazed how this works! No green left on the patio or stone wall in just a few days. No scrubbing, no hard work needed, just spray and walk away!!
5 Nov 2022
Mr John Dickson
Used this to clean algae and moss from wooden fencing before repainting and it’s absolutely brilliant
10 Jul 2022
Jennifer
Does what I says on the tin and does it well! Patio looking as good as new. Very quick delivery.
6 Jun 2022
Ricky Woods
Did a super job clearing the green algae of my garden fence and gate
23 May 2022
Frequently asked questions
Is this product suitable for resin pathways where mould is growing rapidly? Tia
Please test a small inconspicuous area first.
Can this be used to clean a polycarbonate conservatory roof?
Yes, but please test a small inconspicuous area first. The polycarbonate may vary
Hi. Can a plastic watering can be used to apply the solution or must it be a metal can? Thanks.
Any type of watering can is suitable just rinse well after treatment.
Which product would you recommend to clean general dirt and tree residue off Porcelain outdoor tiles and grout? Also, do you have a product to clean algae and general dirt off brickwork?
We have the Patio & Driveway Cleaner to remove dirt & grime Or the Simply Spray Patio Cleaner for green mould or algae.
We always recommend testing a small inconspicuous area first.
We have the Traffic Film Remover to remove tree sap from your porcelain slabs.
We always recommend testing a small inconspicuous area first.
We have the Traffic Film Remover to remove tree sap from your porcelain slabs.
https://www.hygienesuppliesdirect.com/ultima-plus-xp-traffic-film-remover-5l
Can I restore my rendered wall that has been painted with snowcem cement based paint, as it is looking dirty but I don’t want to repaint it yet.
Yes, but please test a small inconspicuous area first. You can also check with the manufacturer of the snowcem paint.
Hi is there a minimum temperature before using the spray and away
Do not apply to frozen ground or in freezing conditions.
Hi, is the green mould and algae remover safe to use on outdoor porcelain tiles/patios?
Thanks
Yes, but also recommend testing a small inconspicuous area first.
Can pro kleen algae remover be used on terracotta plant pots cheers
Yes, it can be used on terracotta plant pots but please keep it away from your plants.
My cat rubbed himself against an area that was sprayed and still slightly damp. He seems OK (only just happened) but how toxic can this be to pets when damp?
Please rinse and dry the cat's paws and then keep them from the treated area until it is fully dry.
Can you use your products on granite steps?
Yes, this product can be used on granite steps.
Can I clean my polytunnel cover of algae using your Prokleen Patio cleaner
Yes, it can be used on a Polytunnel cover to remove algae.
When is the best time of year to spray this ?
We would recommend using it when the weather forecast confirms no rain for a 24-hour period before application. Do not apply to frozen ground or in freezing conditions or in high summer temperatures.
Does the patio need to be completely dry.
Make sure that rain is not forecast in the next 8 hours after application. If the patio was rained on brush away excess water first. For better results it is better if the patio is dry.
Do you have to wear protective clothing and mask and goggles to spray this product please ?
Protective clothing & gloves & goggles can be used along with old clothing. Be careful when applying.
Link to the video showing the application
https://www.hygienesuppliesdirect.com/products/prod229020-5-litres-simply-spray-concentrate
Link to the video showing the application
https://www.hygienesuppliesdirect.com/products/prod229020-5-litres-simply-spray-concentrate
How long should I wait after applying before pressure washing my patio. I still want to pressure wash it, once the treatment has done it's magic. Will this reduce it's effectiveness?
Please wait at least 7 to 10 days after treatment, the green mould & algae will change from green to brown. If you rinse earlier it may reduce its effectiveness.
Will this product taint soil after grass has been killed.
I.E new grass will die too if re-turfed?
Yes, this product will damage grass, shrubs and other garden plants. So rinse away from them when treating your patio area. Rinse the area well if it goes onto the grass area to protect against discoloration and damage.
Can this be used on block pavers
Yes, it can be used on block pavers.
What is the product's shelf life, please?
Unopened 2 years but opened approximately 1 year. Please keep out of frost or sunlight.
Can you use it safely on a tar driveway.
Yes, this can be used on a tarmac drive. Please follow the label instructions.
Does the product work well if applied in cold weather ie 4-10 celcius?
Yes, it can be applied in cold temperatures but only on a dry day with no rain forecast.
Can this be used on tent fabric as I have some mould to remove?
Yes, but we always recommend to test a small inconspicuous area first.
I need to clean a canvas boat cover that has some green algae showing, is it suitable and what dilution would be best.
No. This is suitable for hard surfaces.
But we have the Soft Top Roof Cleaner available that may be suitable
https://www.hygienesuppliesdirect.com/products/prod232072-pro-kleen-soft-top-cleaner-750ml
Please test a small inconspicuos area first.
But we have the Soft Top Roof Cleaner available that may be suitable
https://www.hygienesuppliesdirect.com/products/prod232072-pro-kleen-soft-top-cleaner-750ml
Please test a small inconspicuos area first.
Can I use this product on concrete driving after it has been raining
No. Once your driveway is fully dry with no rain for 24 hours then the product can be applied.
Can this be used to clean rubber or epdm roofs?
Yes, but different types of rubber are available so please test a small inconspicuous area first.
Will simply spray and walk away kill the algae growing on my tarmac drive? Thank you.
This can be used on a tarmac drive and will remove the green algae.
Can you use this to clean stained decking? How long after applying can you re stain decking.
This will remove most stains from your decking. A small inconspicuous area can be tested first. Once the treated area is dry a new stain can be applied depending on the stain instructions.
I have used your excellent product over some time with great results. I know I cant use it with frost on the ground but can it be used in the winter and if so is there a temperature below which it shouldn't be used?
Thanks
Bruce
This can be used in the winter months but not on a wet or freezing day.
I am about to clean some outside wood fencing boards. I wish to paint them afterwards, can I do this, and how long should I wait.
We would advise you to wait 2 weeks before painting the treated fence.
Hello. Your advice to paint the fence before applying Prokleen came too late.
I have already treated the fence. How long should I wait before painting and should I wash it first? Thanks.
Once the fence is fully dry it can be painted or treated.
Can this be used on PV panels.
Can it just be sprayed on to work.
Thanks
Yes, this product can be used on UPVC panels, but we would advise you that if the run off comes into contact with grass or plants, it will damage them. Use protective clothing and do not apply if windy.
Hi are there any health & safty issues when spraying I will wear a mask Jim
You can use a mask if you prefer when spraying. Read the instructions on the bottle carefully, then simply decide your required dilution and apply with watering can or pump sprayer and apply the solution to the entire area.
Hi, I have used your mould and algae cleaner on a shed and the green mould has turned white. Do I now need to remove this white residue before painting with a shed preserver? Thanks.
Brush and remove the white mould before using the shed preserver.
Hello.... I painted my wooden fence last year with cupranol black for fences.... Will it take off algae and not paint
Please test a small inconspicuous area first or check with Cuprinol.
WHILE SPRAYING ON TO CAMPER VAN WILL ALGAE REMOVER HARM WINDOWS
This product will not harm windows on the camper van. However, the product takes 2 - 3 days to kill any mould and algae, so we would advise you to bear this in mind before rinsing off.
Can you tell me pro-Kleen patio Alge cleaner is safe for pets .
Once dry and soaked in yes
Can this product be used on glass patio screen?
Yes, but always test a small inconspicuous are first.
Hi
Does this contain 2,4-d?
Thanks
No, this product does not contain 2,4-d. The active ingredient is Benzyl Chloride.
Hi, can this product be used on bitumen coverings, ie shed roofs ?
Yes, this can be used on a bitumen shed roof.
Hi.....can proclean be used to remove algae etc from solar panels?
This is safe to use on your Solar Panels to remove algae.
I need to paint 450 linea feet of fencing that is covered in green algae using a woodstain. Do I need wash the fences after treating with Pro-keen before I paint them? Or can I just give them a light brush down? Presumedly Pro-keen just kills the algae rather than removing it?
Please apply the woodstain first by following the instructions on the product. After allowing it to dry as per the label. Lightly brush down the fencing before applying the Patio Cleaner.
Hi
Can you tell me if this will kill liverwort please?
This was not tested on Liverwort.
I used ProKleen on my patio five days ago and have seen no results whatsoever. I wonder if I have doen anything wrong? I used a 5 litre diluted with x4 water across a patio of about 20 metres by three metres. It's had no cleaning effect and there no difference in the many white spots on the slabs.I did put it on in hot sunshine and it's been relentless sunshine since. Am I to wait or will the weather have nullified the effect?
This will only kill mould and algae. You will need our Pro-Kleen Drive and Patio Cleaner to remove built up grime. Please follow the link below for more information:
https://www.hygienesuppliesdirect.com/search?q=Pro-Kleen+Driveway+and+Patio+Cleaner
Please note this this should be applied in the late evening not in the full day sun.
Please note this this should be applied in the late evening not in the full day sun.
I would like to do the roof of my summerhouse. but i have flower borders underneath. will this kill the plants if it runs off the roof onto the borders
This product would yellow the flowering borders if it is allowed to spill over onto it. To avoid this, we would advise you not to allow overspill onto any grassed areas or flowering borders.
258199
Your Question: I would like to do the roof of my summerhouse. but i have flower borders underneath. will this kill the plants if it runs off the roof onto the borders
Our Response: This product would yellow the flowering borders if it is allowed to spill over onto it. To avoid this, we would advise you not to allow overspill onto any grassed areas or flowering borders.
Will I also have to let the rain water that falls on it for the next few weeks drain into a water but as well. or would that be
We would recommend on using it when the weather forecast confirms no rain for a 24 hour period before application. It may discolour your borders and plants so please apply on a dry day.
Hi, do have any agents in the Republic of Ireland, I live in Dublin and I am looking for the patio and driveway cleaner which has been recommended to me, any info would be helpful, thanks.
Unfortunatley, we do not have any stockist in Ireland. But we do deliver with a delivery charge applied. The charges are linked below:
https://www.hygienesuppliesdirect.com/delivery-information
https://www.hygienesuppliesdirect.com/delivery-information
After treating decking - how long before i can oil clean decking and should i rinse before?
We would advise you to wait 2 weeks before applying oil to the decking.
Hi, is this safe to use on Indian sandstone slabs?
This can be used on Indian Sandsstone.
My patio sits directly adjacent to my koi pond. If the product inadvertently drained into the pond would it kill my fish?
The product is dangerous to aquatic life so I would not advise using it so close to the pond. It will your Koi Fish.
Hi
can pro-kleen be used on lead roofs?
This product can be used on lead roofs.
Have light coloured concrete roof tile which are now black with algae. Will this product return to original colour? If so what is process
This product will remove black algae and mould. However, if there is any black lichen present, this product may struggle to remove it. Lichen is very stubborn to get rid off and we would advise you to use the Ultima XP neat to remove it. Please follow the link below for the product details:
https://www.hygienesuppliesdirect.com/products/prod234799-ultima-plus-xp
https://www.hygienesuppliesdirect.com/products/prod234799-ultima-plus-xp
Hi, will this cleaner remove the previously applied Oil stain? I have algae on top of my grey stained decking and I don’t want this cleaner to affect the stain Colour. Thanks
This will remove algae from your decking but not oil stains or colour.
Can it be used with a brush as I have an amount of mold on trellis work with plants behind and spray isn't appropriate?
Yes, this can be applied by brush, but we would advise if the product spills on to plants, it can damage them.
What is the shelf life of Prokleen concentrate and what is the best way to store it until needed?
Thanks
The shelf life is around 3 years. Keep in a cool, dry, well ventilated area. Keep containers tightly closed. Store in correctly labelled containers. Keep out of reach of children.
What concentration is the active ingredient please ?
This product contains benzyl alkyldimethyl chloride.
Hi, I am planning to use your green mould and algae cleaner on a shed. Once the mould has turned orange I will wash off. I then want to repaint shed with Cuprinol Garden Shades. How long should I leave it before I paint? Thanks. Michael.
We would advise you to wait 2 weeks before painting the treated shed.
If Prokleen runs off my terrace will it harm fish in my pond?
Best regards. Richard
The product is dangerous to aquatic life so I would not advise using it so close to the pond
I have bought your Green Mould & Algae Remover. Please let me know which chemicals are inside: BZC? It's not listed on the container.
That refers to the active ingredient Benzyl Chloride.
Can it be used safely on a caravan roof to get rid of green growth & black spots.
Will the product prevent regrowth? if so for how long?
This can be used and we also have a Caravan & Motorhome Spray & Shine
https://www.hygienesuppliesdirect.com/products/prod250585-pro-kleen-caravan-and-motorhom
https://www.hygienesuppliesdirect.com/products/prod250585-pro-kleen-caravan-and-motorhom
What is the active ingredient?
The active ingredient is Benzyl Chloride.
Hi, we have artificial lawn one side and the green artificial/outdoor carpet style the other side which is a play area. I know you have artificial grass cleaner but can I use what I already have of yours on the outdoor carpet style? It has lots of mould/algae etc on it ...looks black in places!
Yes absolutely it works well on articficial grass areas
How long after applying can you jet wash your decking?
No, need to be jet washed from your decking. Simply spray & walk away.
Hi. Can the Green Mould and Algae Killer patio cleaner be used in the winter months (not in frost or ice obviously)? Should it still be used in late evening or better to do it earlier in the day when it is slightly warmer? Many thanks.
Apply in dry conditions avoid applying when rain is forecast for the best results. Do not apply when frosty.
Need to spray tarmac to kill mould and algae. If spray gets onto grass, shrubs or other garden plants will it damage or kill them?
Yes, this product will damage grass, shrubs and other garden plants.
Hi,
We just purchased 20 little of the Mould and Algae killer and have 2 questions:
1) We have purple original slate which we are intending to use the product on - could the product discolour or damage the tiles in anyway?
2) We also have a large sand arena used for horse-riding / showjumping which has small tuffs of grass growing in various place - have you a product to kill the grass growing on sand which would be safe to use where horses are active?
Thanks
Colm
This product will not damage or discolour purple slate. Although it may damage grass, it is mainly designed to kill mould and algae. It is safe to use in areas where horses are active, but we would advise you to make sure the treated area is dry before using.
Hi, can this product be used on outside rendered walls? Thanks.
Yes, but you can always test on an inconspicuous area first.
Hi, I've been using your product to keep my patio mould/algae free for a few years and it works fine. Is it safe to use it on UPVC/Plastic ? I would like to use it on a UPVC Conservatory - in particular the roof which is some sort of clear plastic and not glass. Many thanks in advance !
Yes, this product can be used on UPVC on your Conservatory.
Can this product be used on composite decking
Yes, this product can be used on composite decking.
Hi does this contain Benzalkonium Chloride. I ask because it seems to be what I need for my drive but I am allergic to Benzalkonium Chloride? Thank you in advance. Neil
This product contains benzyl alkyldimethyl chloride. We would advise not to use the product if you are allergic to the included ingredients.
After using pro kleen on fence its left a white film where algae was do you now why and how to get rid of white film
The algae discolours to a white film after the treatment but will disappear fully.
Is this dangerous to pets paws if walked on when wet or just if ingested? Also is it ok to use around garden pots or will the roots soak up the product and kill the plants?
It is safe for pets to walk on the treated area once it is dry. It will not effect your potted plants unless they are sprayed it would then discolour the leaves.
I love your Pro-kleen product and have used it previously on concrete slabs and garden furniture etc. My question is, can this product be safely used to remove green algae staining on tarmac drives?
The Simply Spray and Walk away can be used on Tarmac.
I have black Mould on sone of the planks outside of my garden house which is treated pine can I use this diluted to help remove
Yes, you can use this product to remove black mould.
Hi I am a resident in northern Ireland I used prokleen on my concrete yard last year and was very pleases with the result I may have purchased it on amazon but it is no longer available can you supply me or give me a northern Ireland supplier BILL LYLE
This product is still available. Please follow the link below for further details:
https://www.hygienesuppliesdirect.com/search?q=simply+spray
https://www.hygienesuppliesdirect.com/search?q=simply+spray
Will this product kill lichen, also can i use in a pressure washer.
We would recommend the Ultima Plus XP for removing Lichen.
If water run off drains into a septic tank will this affect function of tank?
We would advise you not to use this product if there is chance of it draining into a septic tank.
Hi. I have roofs which have both old clay pan tiles and newer standard roof tiles. Can I safely use this product on these without damaging them?
Yes, this product would be safe to use on both tiles.
Is the product OK to use on pvc decking
Yes, it is safe to use on pvc decking.
I have a garden path made with Cotswold buff (limestone I think) decorative stone. Would this product clear the unsightly green algae that has discoloured the surface of the stones?
Yes, this product would remove the algae on the stones.
If it is sprayed near grass or plants near to the timber decking, when washed off will it kill the grass or plants?
Yes, this product will cause damage to grass and plants.
Dear Sirs, Can your product be used on bushes and trees? If not could you recommend a good product.
Thank you,
Michael mahon.
Unfortunately, we do not have a product to remove mould or algae that can be used on bushes and trees.
Can you spray when there is a bit of ground frost?
No, we would not advise you to use when there is frost on the ground.
Ask one of our experts!
We aim to answer all questions as soon as possible - often within a few hours! Although please bear in mind that during busier periods it may take up to 48 hours to receive a response. We look forward to hearing from you.
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