Best Crack Repair for Asphalt

[frotis]

What is the best caulk style crack repair for thinner cracks ~1/4 on asphalt. This is for my personal driveway, I just have a couple cracks I want to seal.

I really like the Henry 308, but I cant find it local anymore.

http://images.orgill.com/200x200/6243661.jpg