Diesel and other petroleum products are prohibited as which item in asphalt operations?

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Release agents are applied to forms and equipment to keep asphalt from sticking during paving. Diesel and other petroleum products are prohibited for this use because they can contaminate the asphalt and surrounding materials, create harmful fumes, and leave residues that interfere with performance or cleanup. Because of these issues, approved non-petroleum release agents—such as vegetable oil or commercially designed release agents—are used instead. Water and soap isn’t a reliable or standard release agent for asphalt, and claiming that no release agent is required goes against typical practice where a release agent is needed to prevent sticking.