Single sided 2 inch tape
The only tape I have found that actually manages to stick polyethylene sheet is...
3M All Weather Flashing Tape 8067 Tan, 2 in x 75 ft Slit Liner
https://smile.amazon.com/gp/product/B00I2TUC3G/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1 $14.95