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2 x 5L Pro-Kleen Super Strength Black Spot Remover £28.49 delivered with code @ HSD
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2 x 5L Pro-Kleen Super Strength Black Spot Remover £28.49 delivered with code @ HSD

£28.49 Free P&P FreeHSD Deals
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Refreshed 5th Jun (Posted 5th Jun)

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25 Comments
That is enough for a very big face.
Or just buy 25l 15% Sodium Hypochlorite direct from ebay....£30
Will this work on my slabs?40988229-fXvFP.jpg
Edited by: "tom6195" 5th Jun
tom619505/06/2020 17:26

Will this work on my slabs?[Image]


I have the same issue
Agree with fulabeer Sodium Hypochlorite (the main ingredient in this) will work just as well, and all it is bleach.......so you may already have some that you can try first. If eBay doesn’t float your boat you can also get it from Amazon
tom619505/06/2020 17:26

Will this work on my slabs?[Image]


Yes.

I bought some for my block paving drive - works really well - much better than the stuff I bought from Screwfix. I dare say you could buy something with the active ingredients for cheaper elsewhere, but this stuff works well.
tom619505/06/2020 17:26

Will this work on my slabs?[Image]


I used this one - expensive but I had the same issue and can vouch now that these are 95% -98% gone. I can even show before and after pics if you want


Smartseal Patio Clean Xtreme – Powerful, Highly Concentrated Patio Cleaner & Black Mould Spot Remover- for Natural Stone, Concrete, Paving Slabs, Indian Sandstone & Limestone (5 Litre) amazon.co.uk/dp/…0AX
fulabeer05/06/2020 17:22

Or just buy 25l 15% Sodium Hypochlorite direct from ebay....£30


Exactly!! Will eat black spot in no time and last twice as long as this!
For best results, try to powerwash the area first. The reason for this is to remove the tough outer layer.
Also, the bleach can work better if it has less to do. (do not apply bleach THEN power wash. You will be spreading bleach everywhere)

You need the 14/15% Hypochlorite as weaker bleach cannot break down the fungus membrane.
Bad areas will turn white at first. Don't panic! This shows it is working. Sometimes, you will see red patches like blood. This is also normal.
If it is (pet/child) safe to do so, you can leave on overnight. You must rinse/wash the area afterwards (if it doesn't rain). Otherwise it can leave white marks (which is salt)
Very bad areas may need multiple attempts.

My biggest tip is to wear clothes you don't mind getting bleached. As no matter how careful you are, it will get on your clothes!
Edited by: "fulabeer" 5th Jun
fulabeer05/06/2020 17:22

Or just buy 25l 15% Sodium Hypochlorite direct from ebay....£30


Do you have a Link please..seem to be around £38 for 25l



Personally would prefer pouring from a 5L Bottle than a 25l one into a pressure sprayer given it’s a corrosive chemical
Edited by: "dodgymix" 6th Jun
fulabeer05/06/2020 22:40

For best results, try to powerwash the area first. The reason for this is …For best results, try to powerwash the area first. The reason for this is to remove the tough outer layer.Also, the bleach can work better if it has less to do. (do not apply bleach THEN power wash. You will be spreading bleach everywhere)You need the 14/15% Hypochlorite as weaker bleach cannot break down the fungus membrane.Bad areas will turn white at first. Don't panic! This shows it is working. Sometimes, you will see red patches like blood. This is also normal.If it is (pet/child) safe to do so, you can leave on overnight. You must rinse/wash the area afterwards (if it doesn't rain). Otherwise it can leave white marks (which is salt)Very bad areas may need multiple attempts.My biggest tip is to wear clothes you don't mind getting bleached. As no matter how careful you are, it will get on your clothes!


Thanks for info

Yep I’d jet washed first and some flags are badly afffected / some have virtually non and wifes come with the daft idea of replacing 50 sq metres of sandstone paving when I think it’s a waste of time and money if I can clean it / re point it



Would you water it down?

Use a pressure sprayer.. was thinking of getting a 5 litre one at same time

Many thanks
Edited by: "dodgymix" 6th Jun
dodgymix06/06/2020 07:47

Would you water it down?


No, you use it neat. People are always surprised how new the flags/blocks look. Obviously there is nothing you can do about weather erosion. But re pointing afterwards will give a "as new" look.
Ok 25l of sodium sounds good value for money but how do you apply it with a pressure washer
tom619506/06/2020 10:08

Ok 25l of sodium sounds good value for money but how do you apply it with …Ok 25l of sodium sounds good value for money but how do you apply it with a pressure washer


You need to leave it on to soak in / work

I meant Using one of these to put it on
40995505-diqG1.jpg
Mine came off with a pressure washer
Check your local builder merchants , my local is selling Sodium Hypochlorite

(the main ingredient in this)25ltr for £16.49

if buying online the postage will be high. 25KG weight

samuelkirk.co.uk/hyp…asp
Edited by: "DELOS" 11th Jun
grimboj211/06/2020 15:03

Mine came off with a pressure washer


Black spot doesn’t generally come off with a pressure washer so you’ve done well
I have Derbyshire red and cream paving slabs from B&Q which are now covered with black spots. Will this product or Sodium Hypochlorite remove the colour from any of these slabs?
Thanks. Anyone know how it compares to wet and forget?
HiteshKhetani11/06/2020 19:50

I have Derbyshire red and cream paving slabs from B&Q which are now …I have Derbyshire red and cream paving slabs from B&Q which are now covered with black spots. Will this product or Sodium Hypochlorite remove the colour from any of these slabs?


Should do yes
Do any of you scabrous dogs know if it'll get rid of this?!

Bear in mind that this stuff, or diluted bleach, much the same thing, will kill any plant life if allowed to run off the patio.
Cheap bleach mixed with some washing up liquid (only a drop) A deck brush, hose and watering can, just takes a bit of elbow grease folks.
portbhoy300013/06/2020 11:21

Cheap bleach mixed with some washing up liquid (only a drop) A deck brush, …Cheap bleach mixed with some washing up liquid (only a drop) A deck brush, hose and watering can, just takes a bit of elbow grease folks.


Tried this first and yes it gets some off but still left loads
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