TYVEK dust cover tapes are recommended for sealing the back of picture frames. Tear resistant they provide a secure backing when moving frames for exhibits.
This self-adhesive foil-backed tape was developed specifically to seal backing board to frames. It attaches firmly to almost any surface and conforms
Lineco Frame Sealing Tape
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jimtinso Self Adhesive Picture Frame Backing Tape,2'' Wide x 55 yd Rolls Kraft Paper Packing Tape
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jimtinso Self Adhesive Picture Frame Backing Tape,2'' Wide x 55 yd Rolls Kraft Paper Packing Tape
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Self-Adhesive Picture Frame Backing Tape Rolls (2.5