They can be made of metal and rubber or just rubber or soft foam and fabric the kind you choose will depend on the type of door you re dealing with.
Soundproofing tape door.
Door insulation and soundproofing tape 2 rolls 3 4 inch wide x 3 8 inch thick foam draft gasket tape 10mm thick and black total 13 feet long 2 x 6 5 ft each 4 4 out of 5 stars 3 403 15 98 15.
Generally you should stick with the pillowy kind if you re soundproofing interior doors and rubber sweeps for exterior ones.
Adhesive foam tape 3 rolls 1 4 inch wide x 1 8 inch thick high density sound proof insulation closed cell foam seal weather stripping for doors and windows total 50 feet long 16 5ft x 3 rolls adhesive foam tape 3 rolls total 50 feet long 1 2 inch wide x 1 8 inch thick insulation soundproofing neoprene rubber door weather stripping 3 x.
Soundproof door sweeps are items you attach to the bottom of your door to bridge the gap between it and the floor.
Adhesive foam tape weather stripiping 50 1 2 inch wide x 1 16 inch thick black seal gasket for speaker door insulation soundproofing rattle 33 ft length 4 6 out of 5 stars 521 12 99 12.