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How is the shelf life of cyanoacrylate when unopened?

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How is the shelf life of cyanoacrylate when unopened?

(a) 10 days

(b) One month

(c) One year

(d) Lifetime

This question was posed to me during a job interview.

This key question is from Vulcanization and Forming of Rubber, Adhesion Process and their Types in division Glass & Elastomers of Engineering Material & Metallurgy

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Right option is (c) One year

Explanation: Cyanoacrylate is an adhesive belonging to the wood glue family. These are commonly used in household and medical applications. This adhesive has a short shelf life of one year if unopened and of one month once it has been opened.

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