Daily Quiz (8)


True or False: Efflorescence can move through permeable paint films on masonry substrates.


True or false: Efflorescence can move through permeable paint films on masonry substrates.


True or false: The source of soluble salts migrating to the surface of a coating to create efflorescence can be either the coating itself or the substrate.


True or false: Efflorescence can be easily removed from brick substrates by water washing and scrubbing, even after it has been on the brick for a long time.


True or false: Efflorescence is a thin, weak surface layer comprised mainly of cement and aggregate fines on newly finished concrete.


True or false: Efflorescence and laitance are conditions found on non-ferrous metals.


Why must laitance and efflorescence be removed before coating concrete?


Which of the following is a common contaminant on an exterior concrete wall that should be removed before coating?


 
 
   

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