Review on Colormetrics Black Putty Butyl 5 Pack by David Stewart

The product works great but there is a flat spot on each roll which makes it look square rather than round. This made it very difficult to roll down as the rubber and paper backings were not aligned. The square wanted to stretch the rubber at each square corner while the paper didn't move, so you had to tear the paper every 360 degrees. This made it difficult to collect all of the paper from the top of the gum. It's kinda hard to explain.