Possibly, at the very least smokey. Mine had a slight oil leak from the passenger side chain tensioner, leaked right into the exhaust pipe, causing the whole thing to smoke like the devil. Wasnt hurting, but it looked like it. So yours may do similar, if the mat doesnt melt or as said catch fire. I know you're not happy about it, but ya really should just do the pan, that way ya ain't got to worry about it later on, just get it dealt with. Did the same with mine, had an expensive fix, and now shes parked, has been for about 6 months till I can be 100% back at a job and save to have her fixed, pretty much needs a whole engine rebuild. Just my two cents before ya follow in my steps, dont redneck fix it, do it right, as said before, better safe than sorry. Know it aint what ya want to hear, but if those sealants dont work, just go for the pan, or park it till ya can.