Question

Anyone got any before and after of lichen black spot removers that actually work . safe for dogs and children. ? Not so much kids as can keep them indoors but dogs yes as hell need to go out for toilets hahhaa Left steps after an industrial pressure washer. still bad. need before and afters for proof what works cheers.  

Answer 1

Pressure washer versus chemicals . no contest. Much safer for both kids AND dogs.  

Comments

Absolutely . and the environment. Bleach may work, but what does it do to the earth and ecology around the treated area. Anything that's used should be proved to not harm anything. Does wind me up a touch when things like bleach are suggested with no thoughts to the harm it does.  

Answer 2

Thick bleach scrubbed on and left for a couple of hours or overnight if poss obviously keep dogs away then pressure wash off will lift it.  

Answer 3

Pressure washer or Patio Magic is safe for pets once dry. It dries within a couple of hours on a good day. I used it for 12 years with no complaints from the dog  

Answer 4

Jet wash any day.  

Answer 5

This probably doesn't help but I remember seeing advertised on TV once, it was a spay that was safe for kids and pets as it dried within an hour, it killed everything off over a period of weeks and rain water washes debris away and it had a 5 or 10 year protection stopping anything appearing again, I just can't remember what it was called

Comments

You can get that spray on QVC virgin channel 740

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@furfural I think that's what I saw to be fair!  

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@squab it's called wet & forget it is good but u can get one of Amazon cheaper just as good I have used it alot just type in wet & forget it all comes up it last for about 6 month I do mine twice a yr

Answer 6

I sprayed mine with astonis mould and mildew last week left it for 5 mins then jets washed of. Kids and dogs still alive x

Answer 7

A petrol power washer shifts it with ease well mine does anyway 15hp, 15lpm, 4200psi commercial grade power washer

Answer 8

3 hours soak in NEAT Jeyes Fluid (not) Jeyes patio cleaner but Jeyes it works Fact ! But dont let dogs on it till you wash it off with water and a stiff broom.  

Answer 9

Cheap bleach.  

Answer 10

Good old fashioned vim. Put it down and leave for a few days.  

Comments

@rictus @cuirbouilli can you still buy vim ?  

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@lyceum it is hard to get hold of but yes you can still get it.  

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@lyceum b&q

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@egret don’t think you can beat most of old stuff I love cif cream cleaner as well

Answer 11

Sodium hyphchlorite. Im a landscaper. Wokls everytime.  

Comments

@lightning1457 where can you get that from please

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@marks5 swimming pool / hot tubs suppliers. You tube it. Its very very strong bleach at 15 % you need to wear ppe

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@lightning1457 thank you

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Yes mix it about 3 to 1 broom it on, you can just hose it off, leave for about 30mins before washing off

Answer 12

Algon or Patio Magic. Both are pet and environmentally friendly unlike most other powders or liquids

Answer 13

An algicide like Wet and Forget or Algon, safe for pets and wildlife, and the effect lasts months.  

Answer 14

Try this you dilute and spray on a dry day it cleans everything off and it keeps working over next few months you can clean fences slabs decking and cloth parasols garden furniture

Answer 15

Algon patio cleaner. It’s pet and child friendly, even when wet. Simply apply and leave it to work. It continually reactivates itself so lasts well.  

Comments

@squab you dilute it, you can use a watering can or a sprayer to apply it. I have used a bucket and paint roller before just to save on run off and wastage.  

Answer 16

Ewa Lina check this post out

Answer 17

Elbow grease It and leave for hour come back and scrub over with out door broom and swill haven’t Got any pics but have done it on garden slabs f

Answer 18

Scrub with a brush , not water and white vinager. then cover with sand

Answer 19

Needs hypoing takes 1 hour max

Answer 20

Wet and forget

Answer 21

Patio magic