The Seal Coat (Roof Repair, or any other household repair) scam has never gone out of style.
Recognizing the Scam
The repair people (at least 2 individuals involved) will note that some home repair is needed on your residence and they will quote a price for the work.
A down payment for equipment or the full amount is needed before the repair can begin and many times the repair crew will gain access into the home to perform a theft or will complete a sub par repair on the home.
The so-called repair workers will show great concern for the situation and convince you that the repair is needed immediately before further damage occurs.