7200 is a 3m polyurethane. 3200,4200,5200,7200, all different durometer types, 7200 being the stiffest. I've also used some of the windshield adhesives, like Window Weld, with good results. When I need a cheap polyurethane glue in a caulk tube I generally use PL door an window. 3M stuff is expensive. Sanitred Permaflex can be thickend enough and spread with a notched trowel but has to be colored because it doesnt come in black. I dont have any pics, it was on a boat that I sold. I do have a test peice still. It is 2 ft x 4 ft, glued to 3/4 marine ply. I use it as a walkon spot to clean my boots befor going in the shop. It has been in the rain and sun, hot and cold, etc laying on the ground with no help at all, ever, and still looks good.