Please advise me as to how I could clean the concrete surfaces in the exterior of the house (and in the garage). Some parts of the concrete surfaces have turned light green/brown/marks (not been cleaned for 12 years) etc.
DIY job at the least cost.
How do I change the dull colour of the surfaces to their original colour?
Thanks
I would have to see it first to know for sure but I use hydrochloric acid. Must be very careful when mixing it with water and be sure to not breathe it in. I use this product for driveways before I seal if needed.
Sal
SF2 Concrete
Cheapest way power wash and stain or secondary option new epoxy floors
Acid would be the most effective method
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