Nonstick coating trademarked by DuPont in 1945 (6)

I believe the answer is:

teflon

(Other definitions for teflon that I've seen before include "Non-stick coating as for frying pans" , "Non-stick synthetic resin" , "Trade name for a non-stick polymer" , "Non-stick coating (trademark)" , "Synthetic resin to prevent sticking" .)

I've seen this clue in The Times.

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