Hi there Edelgado, Thanks for choosing Next Day Flyers on your printing needs. We have now numerous types of cardstocks for flyers. Apparently, we do not need a watertight substance though We've drinking water-resistant cardstock. Don’t forget to add coating if you print personalized flyers. We have now matte and https://mylesqhuiu.blogoscience.com/43969144/about-flyer-printing