Which of these scientific products was originally marketed as a failure before being successfully repositioned with a completely different use case?

How well do you know the marketing strategies behind major scientific innovations? The journey from laboratory to marketplace involves complex product marketing decisions that can determine whether groundbreaking research becomes a commercial success. This trivia question explores a famous marketing pivot that changed the trajectory of a now-ubiquitous scientific product.

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Post-it Notes: Originally a failed attempt to create a super-strong adhesive, later marketed as a removable note solution
Graphene: Initially marketed as an electrical insulator before being repositioned as a superconductor
CRISPR technology: First commercialized as a food preservation method before pivoting to gene editing
Teflon: Developed as a laboratory cleaning solution before being repositioned for non-stick cookware