Question from Ruthe
I’ve been hearing some people are using waterproofing sprays on their homemade masks to prevent contraction and/or spread of COVID. This seems like a really bad idea to me – actually using it to breathe through. Is there any way to safely make a bandana waterproof for breathing through?
Lisa’s Answer
It sounds like a bad idea to me too. Waterproof sprays usually contain polyfluorinated chemicals (PFCs) which are highly toxic, particularly to put over your mouth and nose. You could apply beeswax to a bandana to make it water resistant but I cannot tell you if that would do anything to better protect you from the virus.
