Hey, CapGunCowboy; is that polyethylene as in HDPE? If so, Harbor freight sells a "plastic welding kit" that is nothing more than a soldering iron with a little triangular shoe. It does work, as I've used it to repair a crack in the upper hull of a bass hunter type boat.
HDPE is used in a huge number of packaging products, and if one looks around, one can find a myriad of colors to use as fill sticks, should that be needed.
Roger