To　enhance　the　performance　of　interface　agents　for　old　wall　tiles　(IAWT),　four　types　of　polymers　(PTB,　EVA,　VAE,　and　SAE)　were　individually　modified　with　IAWT.　The　results　indicated　that　the　polymer-modified　IAWT　enhanced　the　bond　strength　under　freeze–thaw　cycles　and　wind　vibration,　while　simultaneously　reducing　the　compressive-flexural　ratio　and　water　absorption.　PTB,　a　ternary　copolymer,　presents　a　more　complex　and　dense　incomplete　continuous　spatial　skeleton　matrix　network　structure　compared　with　other　IAWT.　This　unique　structure　contributes　to　its　superior　bond　strength,　as　well　as　lower　compressive-flexural　ratio　and　water　absorption.　This　research　provides　a　theoretical　foundation　for　improving　the　performance　of　IAWT　and　practical　guidelines　for　urban　renewal　projects.　©　2025　Elsevier　B.V.