Blown Asphalt 90/40 General Description of Blown Asphalt 90/40 Blown Asphalt 90/40 is an oxidized asphalt produced by air-blowing selected petroleum asphalts without the addition of catalysts. This type of asphalt has a high softening point, high flash point, and remains stable during the melting process. It is mainly used in the Mediterranean region, particularly […]