The　Interface　Agent　for　Old　Wall　Tiles　(IAWT)　is　an　environmentally　friendly　material.　However,　its　application　in　engineering　is　limited　by　its　tendency　to　lose　adhesion　under　harsh　conditions.　Factors　such　as　freeze-thaw　cycles,　wind　vibrations,　rainfall,　and　thermal　stress　negatively　affect　the　bond　strength　of　IAWT.　This　study　investigated　the　effects　of　PTB　emulsion　on　various　properties　of　IAWT,　including　bond　strength,　freeze-thaw　resistance,　wind　vibration　resistance,　compressive-flexural　ratio,　water　absorption,　and　microstructure.　Orthogonal　experiments　were　conducted　to　examine　the　impact　of　three　key　factors　on　the　macroscopic　properties　of　IAWT.　The　results　indicated　that　increasing　the　ratio　of　PTB　emulsion　to　water　(P/W)　improved　bond　strength　under　normal　environmental　conditions　and　enhanced　freeze-thaw　and　wind　vibration　resistance.　Furthermore,　a　higher　P/W　ratio　reduced　both　the　compressive-flexural　ratio　and　water　absorption.　The　addition　of　PTB　emulsion　slowed　the　hydration　reaction,　increased　the　number　of　micropores,　and　reduced　the　cumulative　pore　volume.　Furthermore,　it　enhances　the　bond　strength　between　the　coating　and　the　base　layer,　thereby　increasing　the　durability　of　the　renovation　project　for　old　walls.　These　enhancements　yield　positive　economic　and　environmental　benefits.　©　2025　Lyu　et　al.