Blown asphalt compositions

in processes for producing compatible, selectively hydrogenated block copolymer-modified, bituminous compositions comprising blowing a mixture of the block copolymer and bitumen with an oxidizing gas at temperatures of at least 375 ° F (190.56 ° C) for at least 75 minutes. The modifying polymer is a selectively hydrogenated styrenic block copolymer and no blowing catalyst is required. Stable bituminous compositions comprising from 6 to 25 parts by weight of block copolymer per 100 parts of asphalt are also contemplated, as well as their use as shingles.