I'll echo what Rattletrap has already said, polyethylene will only bond to itself.
I believe this MAY work
http://www.mec.ca/Products/product_detail.jsp?PRODUCT%3C%3Eprd_id=845524442631453&FOLDER%3C%3Efolder_id=2534374302882912
Skiers and snowboarders use it to repair cracks and gouges on the base, it's also fairly easy to use; just light up and drip it into the cleaned work area.
Should be readily available at any reputable ski/snowboard shop.
Hope this helps,
Cheers