Western Emulsions Inc. supplies a variety of high-quality asphalt emulsions, technical assistance and pavement maintenance contracting services to a wide range of public agencies and private companies. Western Emulsions was founded upon a commitment to providing high-quality products, constant innovation and expert service to our customers. An independent, family-owned corporation, Western Emulsions Inc. has produced quality asphalt emulsions since the opening of our first plant in 1977 in Tucson, AZ. Today, Western Emulsions serves California and Arizona with an emulsion plant in Irwindale, CA, in addition to our original Arizona facility. Our commitment to innovation was witnessed in the 1980\'s with the development of PASS® emulsion, a unique and proprietary asphalt product with rejuvenating characteristics. The product received a U.S. Patent in 1993, and since then it has continued to grow in popularity with agencies seeking to better maintain their streets. More information about PASS® and other products can be found throughout this site. Outside of California, our proprietary PASS® product is licensed to a nationwide network of manufacturers and distributors to the construction industry. Call today and find out why PASS® and our full range of emulsion products have become a permanent part of road maintenance programs of states and municipalities throughout the United States. Western Emulsions Inc. is a proud member of the following organizations: