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It may very well hurt the tape if the tape is baked and doesn't need it to drive moisture out. It all depends on the particular chemistry the manufacturer used to make the tape. Cross-linking, base pre-treatment, surface treatment, varying lubricants, double-calendering, and a number of other manufacturing techniques may respond differently when a tape is subjected to heat beyond that for which it was intended. Certainly expansion and contraction put extra stresses on the tape pack when it is heated beyond 90 degrees F.
At BASF we put thermo stickers in all our containers shipped during summer months and paid extra to make sure no tapes were subjected to more than 95degrees F. If they were, the shipper paid for the container, and we threw the tape out.
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