How can I clean concrete slabs outside?

Question

I have concrete slabs outside my work, and they are really dirty. I've tried water and a stiff broom, but it just doesn't cut it! Any commercial cleaners or home remedys?!

Answer 1

Hi there,

Have a look at this site.......

http://wiki.answers.com/Q/How_do_you_cle...

I think it answers your query.

Answer 2

Wet down the slabs and put bleach on the stains and use your broom to scrub it in to the concrete. let set for 10 minutes and wash off with water.

Answer 3

try a power washer

Answer 4

H2SO4 sulphuric acid ,tho one you use in car battery mix with same amount of water and spill over .after 15 min: brushing with long handle brush .than wash down .

if your dirt is from alleges  use sodium bicarbonate solution will help you