 Now, this is especially true today because most shingles have less asphalt in them than ever before, which means that they're going to dry out all the much faster. And when that happens, the shingles are going to need to be replaced, and that can be pretty expensive. Now, there is another way, however, to extend the life of your roof, and it's called RoofMax. And it's a roof rejuvenation treatment that restores the flexibility and waterproofing protection of aging asphalt shingle roofs.