compur
Been spending a lot of time on here!
I use black "Darice Foamies" sheets sold in craft stores. I have no idea if it is open or closed cell but it works fine for camera seals.
I found some in a dollar store a while back and bought enough to last me a long, long time but it's pretty cheap anyway. Darice makes it with and without an adhesive back. I usually use non-adhesive.
I cut it with a circular knife & steel rule and use G-S Hypo Fabric Cement (with needle point applicator) for adhesive in film door grooves, etc.
I found some in a dollar store a while back and bought enough to last me a long, long time but it's pretty cheap anyway. Darice makes it with and without an adhesive back. I usually use non-adhesive.
I cut it with a circular knife & steel rule and use G-S Hypo Fabric Cement (with needle point applicator) for adhesive in film door grooves, etc.