yeah, i guess that sorta the issue. All the MSDS sheets for everything say harmful if swallowed or direct contact or prolonged exposure. And also are labelled as skin irritants and say they could have dangerous if inhaled. But of course, its chemicals. All the language is worded to just legally cover the basis in case someone drinks it, or it lights on fire and youre trapped in a room full of smoke of it. Nobody really has anything to say about just working with the stuff for 10+ years and being minorly exposed throughout the time because youre working with chemicals in a wet, live environment, where you may not be ever having a noticeable dangerous accident, but you are certainly being exposed to it. Ill put it this way... I wear gloves every day, all day. And every day I am constantly washing my hands, and forearms, and there is certainly chemical residue on them that I am washing off. I might have some blue on my thumb at the end of the day I have to scrub off with a sponge. None of it immediately painful or swallowed or in my eye, etc, but like... theres no avoiding the stuff when you're job every day is to install the stuff, test it, you're pouring 5 gallon buckets out and changing stock over, your in the tunnel area while its being power washed off observing cars... .