Quora User, Curious by nature;RDH. Honestly, it depends on where you live and what type of cleaning you need. This is the internet, it will be different in India than the US. Even in the USA the suburbs will usually be a little less than the city - the costs of running a business, education, skill... Are all taken into consideration.
Depending on the type of concrete used and the size of the sidewalk it will take anywhere from 24-72 hours before it can be walked on. The edges of driveways that will bear more weight may need longer. Check with the instructions provided by the manufacturer for specific dry and cure times.epending on the type of concrete used and the size of the sidewalk it will take anywhere from 24-72 hours before it can be walked on. The edges of driveways that will bear more weight may need longer. Check with the instructions provided by the manufacturer for specific dry and cure times.
Scrubbing it off with a push broom doesn't take care of the problem either. You have two effective options for removing mold and mildew from concrete. 1. Scrubbing With Bleach. Combine 1/4 cup of liquid bleach with 1 gallon of hot water in a large bucket. Using non-diluted bleach may work, but mixing it with water is more conservative and less likely to cause damage to your sidewalk.