What criteria should contractors evaluate when selecting asphalt emulsion suppliers for long-term projects?

Contractors should evaluate grade availability aligned to the project spec, documented QC with COAs for every load, and responsive delivery scheduling with backup capacity. Technical support matters: calibration help, troubleshooting for breaking and adhesion issues, and guidance on surface preparation and rate selection. Commercially, review price escalation terms, minimum order quantities, return policies, and liability for off spec product. Contractors should also audit storage recommendations, shelf life expectations, and whether the supplier can provide consistent emulsifier and binder sourcing to avoid batch to batch performance variation.