protectant

American  

[pruh-tek-tuhnt] / prəˈtɛk tənt /

noun

1. a substance, as a chemical spray, that provides protection, as against insects, frost, rust, etc.; protective agent.

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protectant British  

/ prəˈtɛktənt /

noun

1. a chemical substance that affords protection, as against frost, rust, insects, etc

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Etymology

Origin of protectant

1660–70, for an earlier sense; protect + -ant

Example Sentences

The freezing process involves replacing the water in embryo cells with a protectant fluid and flash freezing with liquid nitrogen, according to Johns Hopkins Medicine.

From Seattle Times

EPA checks whether a “plant-incorporated protectant” might harm farmworkers or wildlife.

From Science Magazine

If the material will be ok with it — don't forget about that handy spot test — using a protectant like the Scotchgard Fabric Water Shield to keep liquid-based stains from ever settling in on your furniture could be a great first line of defense.

From Salon

“I also like that bamboo is a good UV protectant. I can’t put sunscreen on my son yet, so I feel good about taking him outside in these.”

From New York Times

There is also a bit more detail about cleaning fabrics: “Mildew and heavy stains can be removed with a quality commercial outdoor furniture cleaner and protectant.”

From Washington Post