I've had roof shingles in my cab for 2 1/2 years now and have not smelled anything like tar; only the after-effects of a good bean soup dinner. I used a urethane roofing sealant applied from a tube to hold them down. They have remained hard in 85-90 *F days here.I hear the asphalt based stuff can sell like tar at higher temps on warmer days..
It's a good thing you can write cause I couldn't hear that. bad-da-ba-bump.Huh? Can You Talk Louder?