the worst smell, that makes me real sick feeling, and nausea, is the new tar for roofs, the welcome mats made from tires, the apple brand cover for the ipad, the stuff they put on your hair at the beauty shop to keep the curls in, i think it is called petroleum distillate, or something from that? i am not a chemist (my husband was) It smells bad, and in addition to that, when i smell it, i start getting nausea, and headache, and weakness, etc. no, not my imagination, as my 93 year old dad, has the same reaction.