Low-temperature transverse cracking is a major cause of distress in flexible pavements, emphasizing the need for effective preservation strategies. Sealant materials play a crucial role in mitigating this deterioration. With aging and oxidation, pavements become increasingly prone to cracking. Surface treatments, such as fog seals, scrub seals, and slurry seals, rejuvenate aged surfaces by penetrating the oxidized layers. Although traditional tests such as penetration and viscosity have been used, advanced characterization tools are needed to better understand the rejuvenation effects. This study evaluates the feasibility of using the bending beam rheometer (BBR) to assess the rejuvenation performance of innovative sealants at low temperatures. Forty beams—unaged, aged, and coated—were tested using six different sealant materials, classified into two groups: binder-only and mastic sealants, at −12°C. Results indicated that sealant application reduced stiffness and increased creep compliance, indicating effective rejuvenation and enhanced resistance to low-temperature cracking. Beams coated with tar and minerals exhibited higher stiffness (4,965 MPa) and poorer cracking resistance, compared to other binder-only treatments, whereas cement patches performed poorly (4,072 MPa). Overall, BBR mixture beams effectively captured differences in sealant performance. However, further evaluations of field specimens and asphalt mixtures are recommended to validate these findings.