Most of our work is spray work, so we always use blocker boards. The one that we use in the video is a piece of fiberglass from an old sign – about 6’x3.5′. If we don’t use that, we use the ABLE aluminum shield which works quite well in the right situations. In the corners and hard to reach areas, we go back and touch up with a brush. As you can see from the above videos, using the shield is very efficient timewise, especially when doing long runs such as a roadway and works better for us because it takes more time to brush sealer in by hand. Also, it looks better and blends in when the edges are sprayed and you spray from the middle to the edge. That is our 2 cents!