funny story, we were prepping a small room, maybe 5 by 5 for a coating, we mopped with xylene to clean the floor, let it dry and went in to caulk the corners, a few minutes in, my helper goes " this caulking smells funny" I stop and go , "thats not the caulking, thats xylene" at that moment my head started swimming and I was like, Everybody out, we had to sit in the fresh air for about 30 minutes for our heads to clear