Did some research for you Mundy and apparently the best way to stick something to LDPE is by first using a surface activator. Recently Loctite made such a surface activator called "Plastix" and the kit comes with a surface activator and a CA glue. Apparently they claim it's compatible with both Polyethylene as well as Polypropylene
http://www.henkelna.com/product-search-1554.htm?nodeid=8797887758337
Now I have no idea how effective this will be on the magnet so you may need to use CA on the magnet, let it dry and then adhere that to the prepped LDPE with the CA supplied in the Plastix kit
Thanks! My local orange box store has 6 in stock.



