Our friends at A & A Parking Lot Restriping in Northern California know how to keep their customers' lots looking good and lasting long! Here we see they are sealing the joint between the end of the asphalt to the concrete curb! Both our black and gray version crackstix will adhere to either so it's just a matter of color choice! A & A chose gray and heated with their handheld weed torch with a crimped end. It was quite a big job but they used our 1,000 foot rolls and the customer was very satisfied. Thank you A & A!