Find out why you can't use elastomeric paint to seal an asphalt shingle roof like you would a ceramic tile roof. Instead, you should use fibrous aluminum paint, a silver paint commonly used on flat roofs or low-sloped roofs where you have built-up tar. It makes the roof last longer because it forces the sunlight to reflect off of it. And with less UV radiation getting to it, the asphalt stays moist longer and doesn't crack, so you can go many more years without having to replace your roof.