I have seen the factory applied "tar" you mention...but keep in mind it was chosen by the factory and it meets the various requirements that the factory set for the product. I'm SURE there are tars that would match it in lack of smell and sealing performance. (Not to mention it has to stabilize fast so that it doesn't stain thru carpet etc.) BUT...I'm equally sure that some guy will read a thread like this, give no thought to anything and just buy a gallon of liquid roof coating and pour it on! NO thought involved. Thats why I suggest tar be reconsidered as a potential sound deadener. Regardless...the OP has clairified his meaning and we're debating off in left field. There ya go...first time THAT ever happened on the HAMB! Hahaha
Has anybody done any roof repair with this stuff in 110F heat? I have used the tar backed peel and stick as its intended for flashing and such on my 100 yr old house in the sweltering MN summer and believe me, it does stick well, to everything including hands and clothing, and it smells awful when its sitting/heating up in the sun. My black fairlane get like a sauna in the sun and I can't imagine sitting in there breathing that all summer. Also these fumes coming off are poisonous, and once you've exceeded your permissable exposure level (PEL) you will become sensitized. Once you've been sensitized you're reaction will only get worse and worse. These chemicals cause chronic problems, yah you're probobly fine now but 20 yrs from now? Copied from the protect o wrap website CHRONIC/CARCINOGENICITY: No adverse effects expected at ambient temperatures. Prolonged inhalation of asphalt smoke has been shown to cause bronchitis, pneumonitis and abscess formation in laboratory animals. Asphalt fume condensates have been shown to cause tumorgenic responses when repeatedly applied to the skin of laboratory animals. Prolonged inhalation of talc dust may cause lung damage (pulmonary fibrosis), however, the talc in this product is bound in a polymer matrix and dust exposure would not be expected. Asphalt (petroleum, bitumen) is listed by IARC as Possibly Carcinogenic to Humans, Group 2B.