black mould on exposed aggregate concrete

**notechyet** · 12-01-2021, 05:50 AM

*I'm going...
It is upsetting to see the own text errors

Found some more info here.

**1101** · 13-01-2021, 08:49 AM

wet & forget is more like a anti-fungal anti mold.
It takes a while to kill it & wont 'clean' the dead mold .

I'll bet 30sec is more like Janola . It will bleach the black areas back to white.
2 Litres of janola is very cheap at the supermarket.
Janola works better for cleaning concrete .

**Roscoe** · 13-01-2021, 10:54 AM

Originally Posted by 1101

wet & forget is more like a anti-fungal anti mold.
It takes a while to kill it & wont 'clean' the dead mold .

mould, not mold which is Yank and this forum is Kiwi. Get it right!

**R2x1** · 13-01-2021, 11:02 AM

Mould is what grows in the minds of pedants.
Mold is the curable stuff.

**Misty** · 15-01-2021, 01:23 PM

Oxygen bleach is the recommended thing for timber(to not damage the fibres), but would work on concrete too. However, ordinary bleach should be okay, I guess, on concrete as there is less chance of damage.