has good articles & specifications on sealcoating.
There is also a very reasonably priced (less than $230) "beginners course & DVD" at http://www.learnsealcoating.com
(I am not affiliated with them, just know it is available and have seen a copy. It looks like a good starter guide and answers many of the "starting out" questions asked. It was done by a couple of guys actually in the business, not professional writers or companies trying to make a living off selling courses.