Why is this used?

[jar546]

these paint cans cost $35 each, and they are regular, small paint cans, not the tall ones that you see being used for marking the ground. Do you know the purpose of these dots? Comment below.

 

[e hilton]

Looks like it is marking the end of snapties, or where a rebar standoff is showing through the surface of the concrete.

 

[walker.t]

Some sort of rust-inhibitive primer/coating?

 

[jar546]

Some sort of rust-inhibitive primer/coating?

Yes, it is a heavy-duty rust inhibitor that keeps the snap-ties and similar that keeps the rust from bleeding through the stucco.