{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,4]],"date-time":"2026-07-04T05:15:11Z","timestamp":1783142111546,"version":"3.54.6"},"reference-count":51,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T00:00:00Z","timestamp":1782691200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100017691","name":"Guangxi Key Research and Development Program","doi-asserted-by":"publisher","award":["2024AB15079"],"award-info":[{"award-number":["2024AB15079"]}],"id":[{"id":"10.13039\/501100017691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Polyurethane-modified epoxy crack sealants can combine the cohesive strength of epoxy networks with the flexibility required for asphalt pavement crack repair. However, their selection under different winter pavement-temperature conditions requires an integrated evaluation of workability, low-temperature transition, dimensional stability, aging resistance, and interfacial adhesion. In this study, six ambient-curing polyurethane-modified epoxy crack sealants (EUPC) were prepared and assessed under representative winter pavement-temperature conditions, with SBS-modified asphalt used as a reference. All EUPC formulations satisfied the 30 min construction-window requirement, showed Tg values below 0 \u00b0C, T5% values above 300 \u00b0C, and curing volume shrinkage no higher than 3.0%. After moisture\u2013oxygen\u2013ultraviolet coupled aging, the formulations retained a substantial proportion of both tensile strength and elongation, with EUPC-3\/EUPC-4 showing a relatively balanced strength\u2013ductility response. Compared with SBS-modified asphalt, the climate-matched EUPC formulations provided higher direct tensile adhesion, oblique shear adhesion, and flexural\u2013tensile repair recovery. Overall, EUPC-1\/EUPC-2, EUPC-3\/EUPC-4, and EUPC-5\/EUPC-6 are more suitable for mild, cold, and severe low-temperature winter conditions, respectively.<\/jats:p>","DOI":"10.3390\/polym18131617","type":"journal-article","created":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T15:27:37Z","timestamp":1782746857000},"page":"1617","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Polyurethane-Modified Epoxy Crack Sealant for Climate-Specific Asphalt Pavement Repair"],"prefix":"10.3390","volume":"18","author":[{"given":"Xinmei","family":"Zhang","sequence":"first","affiliation":[{"name":"Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang\u2019an University, Xi\u2019an 710064, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Biao","family":"Ma","sequence":"additional","affiliation":[{"name":"Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang\u2019an University, Xi\u2019an 710064, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yan","family":"Shi","sequence":"additional","affiliation":[{"name":"Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang\u2019an University, Xi\u2019an 710064, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiafei","family":"Shu","sequence":"additional","affiliation":[{"name":"Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang\u2019an University, Xi\u2019an 710064, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianmin","family":"Liao","sequence":"additional","affiliation":[{"name":"Guangxi Machinery Industry Research Institute Co., Ltd., Nanning 530007, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tao","family":"Chen","sequence":"additional","affiliation":[{"name":"Guangxi Machinery Industry Research Institute Co., Ltd., Nanning 530007, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,29]]},"reference":[{"key":"ref_1","first-page":"87","article-title":"Comparison of Field Performance of Crack Treatment Methods in Asphalt Pavement of Texas","volume":"145","author":"Mazumder","year":"2019","journal-title":"J. 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