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dampproofer

noun
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damp·​proof·​er | \ -fə(r) \

Definition of dampproofer

: one that dampproofs:
a : a worker that dampproofs masonry walls

— called also waterproofer
b : a dampproofing material

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“Dampproofer.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/dampproofer. Accessed 19 January 2020.

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