Long enough to know if the email wasn't working. Lol. That's the whole point... the company is not worried about any outside contact concerning their product because there is none!
Notice the outdated company news! (too bad that wasn't updated with the website) March 8, 2016......! Hey what business that's legitimately trying to get the word out about their product needs a working email address in the oil and gas industry? lol Bet they weren't worried about missing any sells since there are none anyway! Petrozene should have went with Aqueous....lol