"This paper proposes a solution to the recyclability challenge of thermoset-modified asphalt by developing a castor oil-based vitrimeric binder with dual dynamic chemistries (disulfide and Diels–Alder). This manuscript presents a good concept and the topic is higly relevant for sustainable infrastructure materials. However, the structure of the paper does not meet standard scientific publication requirements. It misses several sections—including an abstract, detailed methods, integrated figures, and conclusions. The experimental design is only briefly outlined and lacks critical information on test conditions, replicates, or performance references. Significant revision is needed before journal submission. Below please find suggestions to improve the paper. 

• Include a comparative baseline with conventional PU- or SBS-modified binders for viscosity, healing, or recyclability to show the advantages of the Co-PUAV. 

• Clarify the experimental setup for all measurements. Please describe how many replicates were used, what controls applied, how sample were prepared, what are the testing parameters, etc. 

• Can this binder be used in hot mix asphalt directly? What are the costs and what are the CO₂ savings?

 • Consider using standards or performance requirements that this new binder should meet and show it complies. 

• Figures are too small and packed with each other. "

This paper is well designed and very interesting. Following are the comments: 

• Consider moving the “Background Overview” into an Abstract or adding a brief Abstract at the very beginning. 

• Please clarify how the 60-day room-temperature storage stability of the castor oil–based prepolymer was evaluated (e.g. viscosity, GPC, visual inspection). 

• Add a dedicated Conclusion section that succinctly summarizes the main findings and their practical implications.

•  The discussion of the Diels–Alder reversibility needs stronger support—please cite additional experimental data (e.g. DSC, FTIR kinetics) or literature examples to bolster this point.