Light-proofing Clam flip-over., For sightfishing.

Well there's something else no one mentioned, landscape fabric. Comes in a variety of sizes and type of material. I would go with the stuff that looks like felt cloth, pretty much black out, light weight and doesn't crinkle like the plastic stuff. You can cut and sew the stuff to fit under the actual hut fabric. Black out material

Fisherman"s idea seems like the best remedy for pinholes. Garden fabric.

Coming shortly to a Costco store near you. I bought a large roll last year for my garden for around $26.00. More than enough to wrap a hut. No fear of noxious fumes compared to spray on remedy.

If it is a clam flip over, mine wore out after about 20 years. Just bought a new tent, and kept the poles and sled. New one is insulated, so way fewer cannisters. Very happy. Not darker though.

This is not something I had considered, and sounds perfect. Gonna give this a go, lightweight + some extra insulation and not spraying chemicals. Thank you!