Weld Mount AT-880 is the newest adhesive in the Weld Mount System. It is designed to bond plastics, metals and rubbers; which have been challenging to bond to, in the past. AT-880 excels at bonding materials like HDPE, such as King Starboard ™. You'll also find it as a great solution to bonding to things like polypropylene plastic. So if you want to mount something on your kayak, you don't have to drill holes.