the seal coat the outfit used who came to do it the last few years must not use the coal tar as you mention as it barely lasts 6-12 months. so from what you are saying it definitely sounds like the coal tar is the better way to go. what is the pro's and cons to using sand in the mix? yeah I understood the MA-10 wasn't for sidewalks but for the parking lot cracks, is it a better brand or is there something else that might be better? Thanks for the info Rich.