also: ホコリよけ
noun
dust cover; dust protection
Refers to an item or measure that protects something from dust, such as a cover, shield, or guard.
プリンターにほこり除けのカバーをかけた。
I put a dust cover on the printer.
このスプレーはほこり除けにも使える。
This spray can also be used for dust protection.
防塵 is a more technical term for dustproof or dust-resistant, often used in specifications for electronics or industrial equipment.
Compound of ほこり (dust) and 除け (よけ, avoidance/protection), from the verb 除ける (よける, to avoid, to keep off).