Which scientific product was originally developed as a failed glue at 3M before becoming one of the company's most successful products?

Test your knowledge about pivotal moments in scientific product development history! The journey from laboratory discovery to commercial product often involves fascinating twists and turns. Some of the most impactful scientific products we use today emerged from unexpected research directions or faced significant development challenges. This trivia explores a particularly interesting case of scientific innovation that transformed an industry.

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Post-it Notes (using an adhesive that was criticized for not sticking permanently)
Scotchgard (initially created when a compound accidentally spilled on a researcher's shoe)
Teflon (discovered when a refrigerant gas experiment unexpectedly produced a slippery coating)
Corning Gorilla Glass (developed first as a failed attempt at lightweight auto glass)