This vent tape fits polycarbonate from 1/4 to over 1/2 inch thick. It works as designed and is easy to use. It will keep dust and bugs out of the channels but will let moisture out.

Our 8 yr old Grow More greenhouse was demolished by a fallen tree, so we replaced it with a new Grow More. When we disposed on the old polycarbonate panels, we noticed that the old vented tape at the bottom of all of the panels was gone -- decomposed. The aluminum tape at the top of each panel was till in tact though. Although I applied vented tape to the new greenhouse, I have to wonder if it is worth the effort.