The growing adoption of bio‑based binders in pavements requires reliable methods to assess their tensile performance and aging behavior. This study evaluates the tensile‑failure response of several bio‑based binders using the Double‑Edge‑Notched Tension (DENT) test and compares these results with linear viscoelastic (LVE) parameters, with particular focus on the Glover parameter (G’/(η’/G’)) across different temperatures and aging levels. For non‑polymer bio‑modified and bio‑extended binders, a strong correlation (≈0.9) was observed between DENT‑derived CTOD and the Glover parameter, indicating that both methods capture similar aging‑related changes in tensile resistance. In contrast, synthetic resin–oil polymer binders exhibited flow‑dominated deformation, negative essential‑work values, and poor repeatability, reflecting tensile mechanisms inconsistent with traditional DENT and essential work of fracture assumptions. Overall, the results support the combined use of DENT and LVE measurements for characterizing tensile behavior in non‑polymer bio‑based binders, while showing the need for alternative approaches for more structurally complex formulations.