My landlord used Henry 209, a roofing tar, to patch up a crack along the basement wall that was leaking. After sealing it they put drywall back up. However, now there is a toxic odor emitting from the wall now and I am afraid it is going to endager my health as well as the other adult and child that reside with me. In the data sheet it clearly states that this is for exterior use only which I explained to them but they refuse to admit fault nor will they remove the tar and replace it with something else. Does anybody know if this is toxic even when the smell disappears or do you have any other advice? Thanks for any help!