Encapsulation　is　a　critical　strategy　for　mitigating　the　instability　of　perovskites,　which　remains　the　primary　challenge　for　their　commercialization.　Traditional　encapsulation　adhesives,　such　as　ethylene　vinyl　acetate　and　epoxy　resin,　are　constrained　by　high-temperature　processes　and　potential　chemical　reactions　that　can　impair　the　efficiency　of　perovskite　devices.　The　use　of　vacuum　silicone　grease,　primarily　composed　of　polydimethylsiloxane　(PDMS),　not　only　shields　the　perovskite　devices　from　moisture　and　oxygen　but　also　significantly　enhances　their　power　conversion　efficiency　from　23.91%　to　25.34%.　Further　investigations　reveal　that　this　improvement　can　be　attributed　to　the　formation　of　coordination　bonds　between　the　oxygen　atoms　in　PDMS　and　lead　within　the　perovskite　structure.　This　mechanism　boosts　efficiency　and　inhibits　the　formation　of　Pb0　defects,　significantly　contributing　to　efficiency　loss　and　instability.　A　ten-fold　increase　in　stability　is　observed　at　approximate　to　90%　humidity,　underscoring　its　potential　as　a　low-temperature,　non-damaging,　and　effective　encapsulation　method　for　enhancing　the　stability　and　performance　of　perovskite　solar　cells.