I think it's going to be difficult to staple the pond liner to the steel cabinet but Home Depot is the place to go.

I've tried several things and strongly suggest you use the adhesive foam weather stripping around the frame of the cabinet where the doors contact the frame. Use the good black closed cell foam stripping. I believe it's sold for sealing the bottom of garage doors.

For the gap between the two doors, if there is no wide rubber stripping with adhesive on one edge then I suggest you buy the heavy duty black planter edging. The stuff you stake in the ground around trees & shrubs to create a border between the grass and mulch. Use a good industrial adhesive like the corning liquid nails. Or if the doors are double walled you can screw it on with sheet metal screws.

Now I assume from the thread title you're going for LIGHT proofing and not trying to seal the cabinet air tight. But keep in mind that unless you seal it air tight and create a venting system with a carbon scrubber, you will still have that sweet dank stank!
pharcyde Reviewed by pharcyde on . light proofing cabs question What are you guys using to light proof your cabs, peticularly the doors? Also Im am currently serching for the thinnest veg lighting and Flower lighting possible. I want to use a 400 hps for the flower but I need to find a slim reflector with venting options, any ideas? Here are the pics of my new all in one cab im working on... Thanks Friends Rating: 5