1 gal. Etch and Clean for Concrete in 4:1 Concentrated

 

 

 

 

80×80 is 6400
225 sq ft  per gallon 28 gallons
6 pails, 5 gallons each

Single coat suggested, but video shows 2 coats

does not mention acid prep

This guy uses a sprayer for large area

 

Common sense fellow