Walter,
I used Henry 532 to seal asphalt after paint removal. The paint that I removed was very thick, so sealing over it was not an option. I washed it down to an acceptable level with a 25 degree tip, with minimal substrate damage (removed the seal coat) and then used the Henry. A 5 gallon bucket was about $25.00 at Home Depot and I have plenty left over. It does however take 24 hours to have full traffic over it, but is dry to the touch in about 30 minutes.