How Do I Seal This?

This is my pollination chamber, I need some cheap way to seal the doors. I dont want the pollen gettin across my house to big grow. I just want a little pollen. Anyways any ideas?

heavy plastic and one of those stick on zippers. remove the doors, tape the plastic on, cut a slit down the middle and stick on your zipper. presto, instant seal! don't forget to put the doors back on afterward, otherwise it won't be very stealth.

TARP ZIPPER DOOR*INSTANT DOOR ON ALL PLASTICS low SHIP - eBay (item 380036043849 end time Jun-16-08 18:36:06 PDT)