Wet & Forget Active Ingredient

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192 posts

Master Geek

#3208030 19-Mar-2024 14:15

Yates Surrender if you want a small package. 50% concentrate.

200ml for about $20. I use 20:1 on our motorhome roof annually and that has kept it pristine.

I made the mistake of purchasing a 1litre bottle for $35 ten years ago. The bottle is still all but full.

A drop or two of added detergent makes for much better coverage on non porous surfaces.

openmedia

3332 posts

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#3208054 19-Mar-2024 15:21

SCUBADOO:

Yates Surrender if you want a small package. 50% concentrate.

200ml for about $20. I use 20:1 on our motorhome roof annually and that has kept it pristine.

I made the mistake of purchasing a 1litre bottle for $35 ten years ago. The bottle is still all but full.

A drop or two of added detergent makes for much better coverage on non porous surfaces.

The McGregor's 200ml Moss Control Concentrate looks equivalent but cheaper again

https://www.bunnings.co.nz/mcgregor-s-200ml-moss-control-concentrate_p0304804

Generally known online as OpenMedia, now working for Red Hat APAC as a Technology Evangelist and Portfolio Architect. Still playing with MythTV and digital media on the side.

muppet

2570 posts

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#3208078 19-Mar-2024 16:17

I use "Never Saw It, Ignore It!"

Very, very cost effective.

There's not even an active ingredient.

mattwnz

20164 posts

Uber Geek

#3208083 19-Mar-2024 16:24

Anyone use Resenes Moss and mould killer and know what the active ingredient is in that?

mentalinc

3239 posts

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#3208084 19-Mar-2024 16:26

mattwnz:

Anyone use Resenes Moss and mould killer and know what the active ingredient is in that?

The datasheet you linked in the other thread says it uses "Sodium hypochlorite"

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johno1234

2808 posts

Uber Geek

#3208124 19-Mar-2024 18:19

IOW bleach

tweake

2391 posts

Uber Geek

#3208128 19-Mar-2024 18:39

johno1234:

I believe it is alkyl dimethyl benzyl ammonium chloride.

Has anyone purchased this chemical and deployed it successfully instead of the branded product? Where did you get it from, what dilution etc and how did it turn out?

I need to treat quite a large area for moss/mold/green stuff and W&F would cost about a grand by the time I finished!

you can buy it at cleaning suppliers wholesalers in 20l drums.

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neb

11294 posts

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Lifetime subscriber

#3208140 19-Mar-2024 18:55

johno1234:
30 Seconds Spray and Walk Away: Benzalkonium Chloride

30 Seconds Outdoor Cleaner: Sodium Hypochlorite

This has come up a few times in the past, Google something like "geekzone benzalkonium chloride". In brief, most anti-mould products are really expensive dilute bleach, a very small number are BZK, and the cheapest way to get it is 5L concentrate, in that form it's meant for outdoor use but you can dilute it to standard strength and get a lifetime's worth of use from one container.

Edited to add: Semi-replying to a few other posts, if it doesn't say otherwise it's bleach. And most of them are.

johno1234

2808 posts

Uber Geek

#3208141 19-Mar-2024 18:58

tweake:

johno1234:

I believe it is alkyl dimethyl benzyl ammonium chloride.

Has anyone purchased this chemical and deployed it successfully instead of the branded product? Where did you get it from, what dilution etc and how did it turn out?

I need to treat quite a large area for moss/mold/green stuff and W&F would cost about a grand by the time I finished!

you can buy it at cleaning suppliers wholesalers in 20l drums.

20L might be many years' supply!

Eva888

2442 posts

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Lifetime subscriber

#3208316 20-Mar-2024 08:37

I have bought Sodium Percarbonate on trade me. $23 for 3kg. Have used it successfully for deck it’s an Oxygen bleach like Vanish etc but without the extra fillers. Can’t remember the ratio I used but easy to find. I would mix it in a bucket by adding very hot water to help it dissolve, then used a sprayer.

cddt

1561 posts

Uber Geek

#3208382 20-Mar-2024 09:37

Similar topic, are these products suitable to apply to a roof to prevent moss buildup? Roof is coloursteel I think.

Previous house had concrete tiles, Edwards & Hardie came and sprayed something on it to kill the moss, but I'm thinking of going the DIY route in our new place.

My referral links: BigPipe | Mercury

duckDecoy

898 posts

Ultimate Geek

Subscriber

#3208391 20-Mar-2024 09:44

cddt:

Similar topic, are these products suitable to apply to a roof to prevent moss buildup? Roof is coloursteel I think.

Previous house had concrete tiles, Edwards & Hardie came and sprayed something on it to kill the moss, but I'm thinking of going the DIY route in our new place.

Ive used the Keep Kleen product, mentioned on page 1, on my coloursteel for years (grime and lichen mainly) and never had an issue.

FiggyNZ

9 posts

Wannabe Geek

#3208506 20-Mar-2024 12:20

Could try this: Bio-Shield® 5L Outdoor Cleaner Concentrate - Just 94 cents per d/L. Why Pay More® – Bio-Shield NZ

David321

486 posts

Ultimate Geek

#3208511 20-Mar-2024 12:28

Definitely check out the bioshield website, same active ingredient at a fraction of the cost. Check out the website, the guy slams wet and forget!

_David_

robjg63

4098 posts

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Subscriber

#3208618 20-Mar-2024 14:42

A while ago, I bought some window cleaner that had the 2.5L container that clips on the hose for application purposes.

It was pretty useless, but I kept the applicator and filled it with regular supermarket bleach.

2L of bleach covers my driveway is what is probably a weakish solution.

I did it twice just before last winter and the bits I did stayed pretty clear.

I figure for $3-4 worth of bleach a couple of months apart, its a pretty cheap DIY solution.

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