Clean the holes thoroughly
Next, workers must clean out the holes in the concrete, removing any trapped dust and debris. If this isn’t done properly, the epoxy won’t completely bond with the concrete.
To do this, some builders attach a straw to a shop vac or a suction line that will pull the gunk out.
Others blow into the straw with their mouths. However, Peterson doesn’t believe this is sufficient.
Instead, he says, brush inside the holes. You can find the tiny brushes for this job at a hardware store or, in some cases, included with the epoxy system. Peterson suggests vacuuming the holes out as well.“I’ve seen some of that glue injected in, and the outside just gets coated with dust, and it doesn’t appear that it’s sticking to anything,” he says. “So it’s really important to get all the loose dust scrubbed and blown out of there.”
