We followed your advice and our patio has been totally transformed! Got rid of all the black spot beautifully. Many thanks for the great video with step by step instructions.
Thank Goodness for this short and sweet demo' and explanation of how to clean your patio with SH. So many others drone on for ages, whereas this gets to the point in no time. Pretty much 1 to 1 ratio of hypo to water, aka 7%. Spray it on dressed like a tramp, let the magic happen, and rinse. No scrubbing necessary. Brilliant!
Have just used the technique and quantities suggested. It worked a treat and we now have a perfectly “spotless “ patio, the first time since laid in 2008. Thoroughly recommend the process. most impressive.
Is this suitable for indian sandstone? If so, I'm going to try this. Does it also get rid of the "Green" that develops on the patio during winter? Thank you very much!
I am on the other side of the pond so perhaps the situations differ here, that said I have found that pre-wetting the surface then using a more diluted bleach solution works well. Just make sure to keep the surface moist as the bleach does its job. You can apply by downstreaming through your pressure washer with a rinse tip (low pressure and no misting). In my experience it works just as well as using a strong solution with a hand type sprayer, and has less chance of leaving various levels of cleaning or color fading. It also uses less bleach and has less damage of doing harm. PS loved the vid, just passing along some alternative methodology.
Good job. However the patio should've been hosed down and soaking wet first before application. It should never be applied to a dry patio as you can end up with white blotches. You should also mix a surfactant with the hypo to keep it on the surface longer to kill any growth. Let it dwell for at least 20 minutes sometimes longer. If it starts drying out then apply a spray of water to keep it wet. Then finally rinse off.
Effective but a word of caution...please NEVER add water to the concentrated acid or base. Always, always do it the other way round - add the solute to the water. This is for safety, you don't want concentrated acid or alkali in your eyes. Also, if you are using an open bucket and accidentally drop something unintended into it some reactions can be splendidly exothermic though your skin and lungs might see it differently.
Was just about to order £30s worth of patio-magic, specifically for blackspot removal, but I've still got half a drum of Hypo in the shed, great vid, thanks!
I know this is old now and I'm sure you've learnt a lot. Though 1) you should really wet the ground first especially if it's hot and 2) add some surfactant into the mix it'll bond to the patio much better and give it more time to react. If you don't have surfactant which 99% people won't, just add some fairy liquid into the mix this will help it foam up. You'll notice a big difference.
Thank you for great video ....... followed your instructions and before I started my indian stone patio was black with black spot and was like brand new after finishing. Thanks Russell.
Thank you for this, I bought 5lt from ebay, off the back of this Video, just done mine. Left for 45 minutes and its come up night and day. Mixed it 50/50
great video for showing how to DIY it - I wonder how bad the smell / breathing was as in all the professional videos they wear respirators, must be a reason for that, even using outdoors.
Very useful. I have used 20 litres so far on some areas and it is very very effective. I used a watering can and mostly did it neat (some 50% but that didn't seem as effective) . I have a huge vast area to do however so just ordered another 20 litres. I have a much large patio that this one at the back and then a much much bigger area even that that of paving and other paths. I took 8 sessions of 1 - 3 hours along just to do the pressure washing first this year. I am wondering whether to buy the back pack device. Will try the next 20 litres with the watering can and then decide. I already bought and used plastic eye protector things and water proof trousers over my wellingtons. Be safe people and can be best to wet the whole area first before applying it to make it soak in better (and don't put it on near plants unless it is weeds you want to kill)
I used this last year for quite a bad case of blackspot on my Indian Stone. It got rid of about 95%+ at the first try so used it again a few weeks later. It cleared the lot and I've not had any since. I used it on a cool damp day so it wouldn't evaporate too quickly before washing off. Highly recommended but do follow the safety advice re masks and pets etc.
You should consider using a clear waterproofing sealer to prevent mold from growing back. Olympic makes a multi surface sealer for concrete and masonry surfaces.
I can't say for sure Robert, but it is just strong bleach so I suspect it would. You could try normal household bleach to test it on a stain. The mix in the video is way stronger than normal bleach. :-)
Not sure Caroyln. It is only bleach, but in higher concentrations. It is not stable and can degrade very quickly. I never noticed any issues with our grass, but there is a 4 inch gap where the fence is. I never noticed anything unusual around the border below the fence, but I was not looking. I can say that all was fine afterwards. :-)
Buy some lauryl dimethyl amine oxide to add to it, (it can be bought online) it will foam up and stay in contact longer, I definitely wouldn’t leave it longer than 60 mins as it needs to be washed off. For nearby plants and grass, ensure these are well soaked before applying it will reduce the concentration when jet spraying it off and they’ll be safe
For anyone struggling to find it a company called Chemiphase has it with free UK delivery. They suggest starting with a 50/50 solution. 5L £16, 10L £25 etc etc. No information on coverage though
Would suggest anyone spraying this wears a decent mask not a cheap nuisance dust mask from DIY store. The fine mist will irritate the fine hair like structures inside the lungs.
Great video I am going to try this on my Indian sandstone today!! Is it safe to use on cobblellock driveways? All the driveways in my estate seem to have ugly black and white spots!! Thanks so much for video!!
Excellent video. I have a lot of sandstone flags which attract a fine green lichen. I'll give the latter a going over with the SH solution and hopefully get similar results.
Just spent a fortune on proprietary branded products for getting rid of black spot from block paving. Didn’t quite complete, saw your video and decided to go down the same route as you have shown to finish off. Just a quicky...I’ve just ordered a new sprayer (same one as yours) as the old one had a metal lance which got a hole in it, has yours got an all plastic lance? From one old Hull boy to another (that has to be were you’re accent’s from) nice video.
Regular house hold bleach is 6% Sodium Hypochlorite and the solution you are using is 1.66% Sodium Hypochlorite, so you could just use dilute house hold bleach?
Shame I can't use it as when I hose it down after some will run off into my Koi pond! so i'm stuck with the pressure washer, unless someone knows of a enviro friendly solution?
Hi Russell - great video - thanks! I know it was recorded a while ago - but did you have any problems with the hypochlorite attacking or corroding the Oregon sprayer ? TIA. Martin
Sodium Hypochlorite is definitely the way to go for black spot lichen. I've tried various other methods but hypo works. Purchase 15% Sodium Hypochlorite, bear in mind it does degrade over time so don't buy an old batch. I don't dilute but 50:50 mix with water may be fine for most. My driveway is porous concrete block and lichen gets in there so trial and error I need undiluted. Word of warning, sodium hypochlorite at 15% will eat through stainless steel in hours, so that includes the spring in your spray lance trigger and the spray lance rod if it's stainless, wash these out thoroughly....I know to my cost.
Russell many thanks. I understand transparent (non slip?) sealant can be applied to patio stone surface and garage driveway stone surfaces, which last several(?) years. Have you tried it and made a video? Does it work? And most importantly which sealant(s) work and would you recommend? Is there a downside to sealing?
I am sorry again Robert. I have never sealed the patio and have no experience of using it. I have heard it is very effective, but did not want to take a chance. :-)
Great video Russell, this is exactly what I'm going to try this week, thanks for the info, was wondering what ratio mix to use. Will use 50/50 or 60/40. Cheers!
Hell no. Not 50/50 I use a 18 gallon tank with a 5 gallon per min pump on it. For 18 gallons my mix is 1, 10% bleach per 18 gallons. If I have any of those deep spots that simply refuse to come out, I use Olympic deck and stain full strength, the spots disappear like magic. These friggin fly by night pressure washing people using those electric , or 2 gallon per minute washer are stupid. Plus who the hell does not use surface washers.
Darren, If the area is heavily soiled you can use a 15% solution diluted at the rate of 5:1 i.e. 1 litre hypochlorite in 5 litres water. For normal use dilute at the rate of 10:1.(apply with knapsack sprayer). It is preferable to spray on to damp surfaces - a dry day is not recommended as it can result in staining. light rain soon after spraying helps to clean the area.
He uses 5l hypo to 4l water. Try it in a test batch in similar ratio to start with and see how it goes for your application. I used it and it was brilliant - very successful. I rewet and brushed in after 30 mins - very hot and dry. Just take it steady.
Hi Russell - just watched your amazing video. Where did you buy your product? Followed your advice & went on line to purchase but the price differential between the various products is huge. Can you advise please?
Hi Gill, I have just had a look on Amazon and added a link to the product I would go for in the video description. 20 litres of sodium hypochlorite. The product I originally purchased is no longer available on Amazon. Look around though, you may find it cheaper. :-)
Thanks for making this video, I'm thinking of trying this on the paths around a old peoples home but am worried about the smell how long did it take for the smell of bleach to go from your patio?
We followed your advice and our patio has been totally transformed! Got rid of all the black spot beautifully. Many thanks for the great video with step by step instructions.
Glad I could help Andrew! :-)
Just the technique and substance I've been looking for. Fed up with all the crap that forms on paving every year. Nice one mate !
:-)
Thank Goodness for this short and sweet demo' and explanation of how to clean your patio with SH. So many others drone on for ages, whereas this gets to the point in no time. Pretty much 1 to 1 ratio of hypo to water, aka 7%. Spray it on dressed like a tramp, let the magic happen, and rinse. No scrubbing necessary.
Brilliant!
Spot on Video. So succinct and to the point so I could actually watch it all the way through! Thank you.
Glad it was helpful! :-)
Close your eyes and ned stark tells you how to clean your patio.
Cheers Ned.
Have just used the technique and quantities suggested. It worked a treat and we now have a perfectly “spotless “ patio, the first time since laid in 2008. Thoroughly recommend the process. most impressive.
That's hilarious
I thought the same! Lol
Thanks for your efforts producing this video.
Simple, well shot and well explained.
🙏👍👏
Thank you Antony! :-)
Is this suitable for indian sandstone? If so, I'm going to try this.
Does it also get rid of the "Green" that develops on the patio during winter?
Thank you very much!
I am on the other side of the pond so perhaps the situations differ here, that said I have found that pre-wetting the surface then using a more diluted bleach solution works well. Just make sure to keep the surface moist as the bleach does its job. You can apply by downstreaming through your pressure washer with a rinse tip (low pressure and no misting). In my experience it works just as well as using a strong solution with a hand type sprayer, and has less chance of leaving various levels of cleaning or color fading. It also uses less bleach and has less damage of doing harm.
PS loved the vid, just passing along some alternative methodology.
Thanks for the info. :-)
Sure made a big difference and it's a lot cheaper than a new patio thanks for the tip
It is a quick and easy way of sorting out the patio. :-)
Good job. However the patio should've been hosed down and soaking wet first before application. It should never be applied to a dry patio as you can end up with white blotches. You should also mix a surfactant with the hypo to keep it on the surface longer to kill any growth. Let it dwell for at least 20 minutes sometimes longer. If it starts drying out then apply a spray of water to keep it wet. Then finally rinse off.
Good advice, thank you. :-)
What is a surfactant example?
@@20wrighty12 you really think someone would mix mustard in this? That comes later at the barbecue....
@@kriscook6830 Fairy liquid? Normal dishwashing soap? Just makes it stick better.
JohnstonPettigrew you have mustard with a bbq? You strange alien
Effective but a word of caution...please NEVER add water to the concentrated acid or base. Always, always do it the other way round - add the solute to the water. This is for safety, you don't want concentrated acid or alkali in your eyes. Also, if you are using an open bucket and accidentally drop something unintended into it some reactions can be splendidly exothermic though your skin and lungs might see it differently.
That's what I was gonna say!
Super job. Took your advice and got some sodium chloride. It done the job even on the wall capping. Many thanks for your time and information,👏👏👏👏
Glad I could help James! :-)
Was just about to order £30s worth of patio-magic, specifically for blackspot removal, but I've still got half a drum of Hypo in the shed, great vid, thanks!
:-)
This statement is just NONSENSE
@@shenidan2023it’s not. Patio magic wank compared to this method.
I know this is old now and I'm sure you've learnt a lot. Though 1) you should really wet the ground first especially if it's hot and 2) add some surfactant into the mix it'll bond to the patio much better and give it more time to react. If you don't have surfactant which 99% people won't, just add some fairy liquid into the mix this will help it foam up. You'll notice a big difference.
Thank you for the tips! :-)
Brilliant, mate. Do you know if this will be effective at deodourizing my mother in law?
LOL - sure thing Jonathan, it's industrial strength!!! :-)
@@RussellPlatten hahaha~~~~~~
@@jackiechen4634 :-)
1l in her tea should do the trick🥵💤
Thank you for great video ....... followed your instructions and before I started my indian stone patio was black with black spot and was like brand new after finishing. Thanks Russell.
:-)
You can use that chemical on Indian stone natural stone it take face off it makes go flaky after few years 🖐️☹️
I do this every year, but i add it to a old watering can and brush it in and working it in. I also jet wash first and apply to wet slabs
:-)
@@RussellPlatten
obviously i jet wash again after, i leave it to dwell an hour . You will get far better results.
Great video Russell thankyou, and all the added advice in comments is extremely helpful.
Glad it was helpful! :-)
Thank you for this, I bought 5lt from ebay, off the back of this Video, just done mine. Left for 45 minutes and its come up night and day. Mixed it 50/50
:-)
Russell,
Thank you for taking the trouble to film and share your secrets. I'm going to follow your technique. Mike
Good luck with the Lichen Mike! :-)
Russell Platten - it worked a treat! Thank you so much. Any thoughts on patch pointing and sealing?
great video for showing how to DIY it - I wonder how bad the smell / breathing was as in all the professional videos they wear respirators, must be a reason for that, even using outdoors.
I never had any issues. :-)
Very useful. I have used 20 litres so far on some areas and it is very very effective. I used a watering can and mostly did it neat (some 50% but that didn't seem as effective) . I have a huge vast area to do however so just ordered another 20 litres. I have a much large patio that this one at the back and then a much much bigger area even that that of paving and other paths. I took 8 sessions of 1 - 3 hours along just to do the pressure washing first this year. I am wondering whether to buy the back pack device. Will try the next 20 litres with the watering can and then decide. I already bought and used plastic eye protector things and water proof trousers over my wellingtons. Be safe people and can be best to wet the whole area first before applying it to make it soak in better (and don't put it on near plants unless it is weeds you want to kill)
Great job there well done, once they are clean perhaps the area should be sealed to prevent further problems, and make further cleaning easier.
Sealing it is a good idea. :-)
What product would be good for sealing it? Thanks 😉😉
I used this last year for quite a bad case of blackspot on my Indian Stone. It got rid of about 95%+ at the first try so used it again a few weeks later. It cleared the lot and I've not had any since. I used it on a cool damp day so it wouldn't evaporate too quickly before washing off. Highly recommended but do follow the safety advice re masks and pets etc.
:-)
Great job and tips. Patio looks great. Many thanks. I’m going to try the same for sure!! Your lovely to watch!!! 👍
Thank you! :-)
Great video well explained, now just have to wait for a good weekend and I can get going!
Good luck Paul. Remember to wear old clothes!! :-)
Brilliant job well done I am going to do our patio next week .where did you buy ur solution please ? Many thanks
There is a link in the video description. :-)
Hi Russell, thank you for posting a useful video. Can I ask what's the ratio of water to the liquid you have used?
5 litres of Sodium Hypochlorite to 4 litres of water. :-)
Thank you very much
Where do you buy the big drums of it?
You should consider using a clear waterproofing sealer to prevent mold from growing back. Olympic makes a multi surface sealer for concrete and masonry surfaces.
I will have a look at that. :-)
A respirator and safety googles is a must.
Would this remove berry stains from indian sandstone. Thank you
I can't say for sure Robert, but it is just strong bleach so I suspect it would. You could try normal household bleach to test it on a stain. The mix in the video is way stronger than normal bleach. :-)
@@RussellPlatten thanks Russell. Great video
@@robertgoude404 Cheers Robert! Glad it was helpful. :-)
my patio borders the lawn, presumably this will kill the grass if it washes on to it?
Not sure Caroyln. It is only bleach, but in higher concentrations. It is not stable and can degrade very quickly. I never noticed any issues with our grass, but there is a 4 inch gap where the fence is. I never noticed anything unusual around the border below the fence, but I was not looking. I can say that all was fine afterwards. :-)
Soak your grass first with water. The grass can only drink so much so that will help protect it.
Buy some lauryl dimethyl amine oxide to add to it, (it can be bought online) it will foam up and stay in contact longer, I definitely wouldn’t leave it longer than 60 mins as it needs to be washed off.
For nearby plants and grass, ensure these are well soaked before applying it will reduce the concentration when jet spraying it off and they’ll be safe
Thanks for the tips Paul! :-)
My sodium has arrived - how long do you leave it on or do you just let it dry off naturally ?
For anyone struggling to find it a company called Chemiphase has it with free UK delivery. They suggest starting with a 50/50 solution. 5L £16, 10L £25 etc etc. No information on coverage though
Thank you Richard, it's nice to know of other suppliers! :-)
Would suggest anyone spraying this wears a decent mask not a cheap nuisance dust mask from DIY store. The fine mist will irritate the fine hair like structures inside the lungs.
Would also suggest not to have 20l of hypo ready to leak down your back.🤣
It was 5l of hypo.
Great video I am going to try this on my Indian sandstone today!! Is it safe to use on cobblellock driveways? All the driveways in my estate seem to have ugly black and white spots!! Thanks so much for video!!
Not sure about the cobbleblock, it should be aright, it is just strong bleach. You should test an 'out of the way' area to check Anne. :-)
I have 3L of Sodium chlorite 25%, doese it work too, or it has to be Hypochlorite?
I do not know. :-)
My york stone has lots of black stuff that the usual garden centre solutions won't get rid of.
Is this stuff safe to use on York stone?
I think so. I am sure others have used it if you look through the comments. :-)
How did the seals on your sprayer stand up to the strong bleach?
No issues Eric. :-)
Where did you buy this sprayer tank, and how many litres is it?
From Amazon. th-cam.com/video/-KyA0ANECQQ/w-d-xo.html :-)
Thanks Russel, this is a really great explanation. I can’t wait to crack on with this at the weekend. Noted added the chemical to the water 👍
Glad I could help Carl! :-)
Hi Russel,
Job done!
Looks like new!
I used it at 100% concentration as the black spot was very bad.
Any tip on sealing it would be appreciated 👍
Is this OK on natural stone or just concrete slabs?
I think iy would be fine for stone, but I am not sure Dominica. :-)
What a well presented video. Welldone
Does it get rid of white spot?
It will work on white spot Harold. :-)
how does the bleach affect these back pack sprayers in the long term?
Mine only gets used occasionally, but seems OK. I rinse it out after use. :-)
Excellent video. I have a lot of sandstone flags which attract a fine green lichen. I'll give the latter a going over with the SH solution and hopefully get similar results.
:-)
Dude....Hypo and Crocs ...very professional !
He is a homeowner not a pro. This is his patio.
lol I don't understand these folks wearing flimsy stuff on their feet, I seen another and they guy was was slippers with a rubber bottom lol.
Just spent a fortune on proprietary branded products for getting rid of black spot from block paving. Didn’t quite complete, saw your video and decided to go down the same route as you have shown to finish off.
Just a quicky...I’ve just ordered a new sprayer (same one as yours) as the old one had a metal lance which got a hole in it, has yours got an all plastic lance?
From one old Hull boy to another (that has to be were you’re accent’s from) nice video.
I am pretty sure the lance is plastic Jeremy. Yes I am a Hull lad, our accent is pretty easy to recognise eh! :-)
Followed your advice and worked great - thanks!
Glad I could help! :-)
Thank you, very informative and ps you have a lovely patio / house .
Thank you! :-)
Regular house hold bleach is 6% Sodium Hypochlorite and the solution you are using is 1.66% Sodium Hypochlorite, so you could just use dilute house hold bleach?
I am using a solution of 8.3%. 15% x 5/9. Household bleach is generally around 5% and contains other surfacants and ingredients. :-)
@@RussellPlatten Sorry I thought it was 1 to 9.
Does it destroy the seals inside the sprayer?
No, the seals are still fine in my sprayer. :-)
Shame I can't use it as when I hose it down after some will run off into my Koi pond! so i'm stuck with the pressure washer, unless someone knows of a enviro friendly solution?
Buy environment bio cleaner it works pretty well and not as harsh or buy a surface cleaner
@@diegochavez679 try wet and forget.
Thank you so much... I have this same bad problems. I tried bleach but it no where near this good. Thank you sir, will try Caustic Soda this weekend.
The bleach I use is way stronger than the bleach you get from the supermarket. :-)
is the sprayer still working
It is Michael. :-)
Beltin Video Russell straight to the point no fuss brilliant . Thanks once again
Cheers Isaac! :-)
Nice. Clear and informative. Thank you
Glad I could help! :-)
Hi Russell - great video - thanks! I know it was recorded a while ago - but did you have any problems with the hypochlorite attacking or corroding the Oregon sprayer ? TIA. Martin
Can i use this on normal tiles/marble floor??
It is strong bleach. I would not use it in enclosed spaces as the fumes would be very bad. :-)
Thanks for your great video. Do you need to worry about the rinse off killing the grass or anything?
It might affect the edge of a grassed area, if I had no pets I would not have rinsed it off. :-)
@@RussellPlatten thanks again an thanks for the reply 2 years on on still replying to messages 👌 much appreciated.
@@R1chardH :-)
Do you always need to wash if off?
If we never had pets, I would not rinse it off. :-)
Do you use a sodium hypochlorite mix
Yes. :-)
Great video! Thank you so much for creating this very informative video!
:-)
Yes absolutely 💯 video loved it, where can I purchase this chemical please
Is that a swimming pool that I can see
will the solution kill nearby plants?
It is only bleach and it did not seem to affect our grass, but you could just leave it dry if you do not have any pets. :-)
This video was helpful,I cleaned a patio.Can I use Sodium Hypochlorite to clean roof tiles?
If I was thinking of trying it on my roof, I would research it online. :-)
Sodium Hypochlorite is definitely the way to go for black spot lichen. I've tried various other methods but hypo works. Purchase 15% Sodium Hypochlorite, bear in mind it does degrade over time so don't buy an old batch. I don't dilute but 50:50 mix with water may be fine for most. My driveway is porous concrete block and lichen gets in there so trial and error I need undiluted. Word of warning, sodium hypochlorite at 15% will eat through stainless steel in hours, so that includes the spring in your spray lance trigger and the spray lance rod if it's stainless, wash these out thoroughly....I know to my cost.
Mine is due to be done again darren. I reckon I'll do it next spring. :-)
Im just about to purchase, this stuff acts like magic in front of your very eyes!
:-)
Great video thank you! Clear instructions and good tips..particularly about not wearing good clothing to do it!
Glad it was helpful Tina! :-)
Beautiful patio and scenery
Thank you! :-)
Great video, great job thank you for the tips I will certainly try it out. all the best now
Cheers Denis. :-)
Russell many thanks. I understand transparent (non slip?) sealant can be applied to patio stone surface and garage driveway stone surfaces, which last several(?) years. Have you tried it and made a video? Does it work? And most importantly which sealant(s) work and would you recommend? Is there a downside to sealing?
I am sorry again Robert. I have never sealed the patio and have no experience of using it. I have heard it is very effective, but did not want to take a chance. :-)
Great video Russell, this is exactly what I'm going to try this week, thanks for the info, was wondering what ratio mix to use. Will use 50/50 or 60/40. Cheers!
Hell no. Not 50/50
I use a 18 gallon tank with a 5 gallon per min pump on it. For 18 gallons my mix is 1, 10% bleach per 18 gallons.
If I have any of those deep spots that simply refuse to come out, I use Olympic deck and stain full strength, the spots disappear like magic. These friggin fly by night pressure washing people using those electric , or 2 gallon per minute washer are stupid. Plus who the hell does not use surface washers.
Darren, If the area is heavily soiled you can use a 15% solution diluted at the rate of 5:1 i.e. 1 litre hypochlorite in 5 litres water. For normal use dilute at the rate of 10:1.(apply with knapsack sprayer). It is preferable to spray on to damp surfaces - a dry day is not recommended as it can result in staining. light rain soon after spraying helps to clean the area.
He uses 5l hypo to 4l water. Try it in a test batch in similar ratio to start with and see how it goes for your application. I used it and it was brilliant - very successful. I rewet and brushed in after 30 mins - very hot and dry. Just take it steady.
Hi Russell - going to try this tomorrow
Hi Russell - just watched your amazing video. Where did you buy your product?
Followed your advice & went on line to purchase but the price differential between the various products is huge.
Can you advise please?
Hi Gill, I have just had a look on Amazon and added a link to the product I would go for in the video description.
20 litres of sodium hypochlorite. The product I originally purchased is no longer available on Amazon. Look around though, you may find it cheaper. :-)
Thanks for making this video, I'm thinking of trying this on the paths around a old peoples home but am worried about the smell how long did it take for the smell of bleach to go from your patio?
Not very long. I did not really find the smell an issue. :-)
Good idea, it will probably help mask the smell of piss!
I was wondering why drain cleaner was so good at making my driveway look brand new, it contains sodium hypochlorite.
:-)
probably is caustic also and that kills organic material and breaks it down (caustic soda for instance)
Looks like you have a great view from that patio.
We do! :-)
How long did you leave it down before washing it off.
I washed it off after it had dried. :-)
Thank you Russell. How long do you wait before you start jet washing?
I just left it an hour or so after it had dried. I don't think it matters, so long as the solution has done it's job. :-)
Russell Platten . Thank you Russell
Very informative, Russell. Needed this. Sodium Hypochlorite is strong bleach...did not know that. So I know what I'm dealing with.
Fantastic job mate how much did it cost on bleach for that size ? For you know
I think I paid around 28 pounds for 25 litres. It is no longer sold on Amazon now. :-)
Just come across this video and have the same problem, which brand of hypo did u use and where did u get it ? Thanks
I got it from Amazon UK, but they stopped selling it. It was sold by Bonnymans. :-)
Russell Platten Thank you
Just tried this on my patio and got similar results. BUT do you have any suggestions for getting rid of the 'white' spots. Thanks for the video.
Not sure about that Chris, have you tried undiluted hypo? :-)
Pre-wet the surface next time
Another good way to do it is mix the solution up and apply it using a watering can.
Yes, that will work, but I reckon it would use more solution. :-)
Brilliant product used it on my sandstone paving worked a treat many thanks. Boy does it stink!
Glad to help! :-)
It helps if you danpen the slabs first, stops them dryiny too quick and hypo gets a bit longer to work
That was very informative. Now to do mine....
I am thinking about re-doing mine. :-)
Good video and clear instructions
Glad it was helpful Maureen! :-)
Omg 15% what did is smel like
It smells of strong bleach! :-)
Brilliant - Super helpful !
I'm gonna do exactly what you did - Just ordered 4 x 5 litres of Sodium Hyporchlorite.....wish me luck :-)
Good luck Paul. Remember not to wear decent clothes, they will be ruined. :-)
Great job. Where did you buy your dispenser from?
There is a link in the video description John. :-)
CAN YOU B USE MARBLE
I am not sure. :-)
Where did you buy the chemical from mate?
From Amazon, but they do not sell it anymore. Look for suppliers online, there are a few here in the UK. :-)
I wonder if this would work on drywall
what exactly do you mean by "drywall"?
Cracking video, cheers mate
Glad I could help Matt! :-)
Nice informative video. Thanks for sharing 👍
Glad I could help! :-)
It oxidizes with the lime in the concrete flags that's why you don't leave it on over night it can resolve anything lime based so I been told
:-)
PPE?? I look like something out of breaking bad when I use it.