I just had a blacktop drive put in and the end where it meets the street(its about 1.5 inches higher where it meets the street) its getting crumbily and cruddy looking mostly because people use it to three point turn in as I am the last house on a dead end. I wanted to find that stuff contractors use to seal the edges when they fill holes but can't find it. I don't think the junk box stores sell will fix/protect it. Any sugestions?