I was in a TrueValue hardware a couple of weeks ago looking at plastic adhesives. They had one that says it will work on any plastic including polyethylene which is very difficult to glue. It is a two step system with a pretreatment that prepares the surface.
Might be worth taking a look at.
Clay (WA5NMR), Lee (Wife), Katie & Kelli (cats) Salli (dog).
Fixed domicile after 1 year of snowbirding and eleven years Full Timing in a 2004 Winnebago Sightseer 35N, Workhorse chassis, Honda Accord toad