Noun
/ladˈɾi.ʎo iˈðɾo.fu.ɣo/
"Ladrillo hidrófugo" is a term used in the field of construction and engineering, specifically in the domain of waterproofing materials and techniques. It is a somewhat technical term and is more commonly found in written materials or professional conversations rather than in everyday oral speech.
Vamos a utilizar ladrillos hidrófugos para la construcción de la fachada.
(We are going to use waterproof bricks for the construction of the facade.)
Los ladrillos hidrófugos son ideales para evitar filtraciones de agua en sótanos.
(Waterproof bricks are ideal for preventing water leaks in basements.)
In this context, "ladrillo hidrófugo" does not belong to any idiomatic expression. It is a technical term used in a specific domain.