Garage Floor Seams: To Cover, Or Not To Cover ?
I live in New England in a townhome that was built in 2005. I am planning to do an epoxy paint on concrete garage floor. I noticed that in my garage the concrete on the floor does not meet the concrete on the walls - its separated by some kind of black insulation/backer board kind of material. While degreasing and etching the floor, I noticed that water hitting the edges was getting drained out at these places. I was originally planning on using an epoxy-based concrete repair kit to cover all these open seams. However, now I am not sure if I should cover these or not ? In addition, I would also like to know what purpose they serve and if garage floor experts on the forums recommend leaving them the way they are ?