Stronger than wet and forget?

[anonymous-user]

I tried wet and forget last year for the first time. Used 5 litres across 3 applications but had little success in removing white growth from brick work.

Anyone used anything stronger?

[119]

As far as I know, the only real successful way of doing it with proper brick acid?

A friend had similar and it seemed to work on his.

[Wildfire]

I believe Wet and Forget is diluted BAC 50 (Benzalkonium Chloride).

You can get more concentrated versions which you can dilute down as needed. I found it got rid of a lot of algae and lichen on the driveway, but not moss between my block paving came back this year. When I sprayed it on the green fence panels it was very effective and the green disappeared within a few days and has lasted 6 months so far.

[wolfracesonic]

That is efflorescence on the bricks and mortar, I don’t think Wet n Forget eliminates that, it’s more of a biocide for lichen/algae. Google will tell you how to deal with efflorescence, not always easy.

[anonymous-user]

wolfracesonic said:

That is efflorescence on the bricks and mortar, I don’t think Wet n Forget eliminates that, it’s more of a biocide for lichen/algae. Google will tell you how to deal with efflorescence, not always easy.

It’s just a bad photo. It’s not efflorescence, I’ve got that elsewhere and it doesn’t bother me.

[Ham_and_Jam]

As mentioned BAC50 is the concentrated stuff, but that doesn’t look like algae.

[dundarach]

Over the last year I've been spraying my brick driveway with bleach, lots or bleach.

It's great and has improved things muchly.

Don't about this however, but it's cheap and smells nice!

[anonymous-user]

Thanks for the input all. Here’s a closer photo, there is a green tinge and it’s a different texture to the white efflorescence I have elsewhere.

Wet and forget done nothing so perhaps it isn’t a fungus.

[bennno]

Sodium hypochlorite from a local country shop... but use very, very carefully.