铝塑板结构硅酮胶硅酮耐候密封胶是用于幕墙板块间接缝密封的硅酮密封胶的通称，用于门窗以及机场、高速公路、其他公路、桥梁等密封的硅酮密封胶在性能和功能上与硅酮耐候密封胶基本一样，可以参照耐候胶的性能指标，结合实际胶缝结构来使用。Siliconeweatherproofsealantisusedascurtainwallplatesealingsiliconesealant,siliconesealantforsealingthedoorsandwindowsandotherairports,highways,roadsandbridgesintheperformanceandthefunctionwithsiliconeweatherproofsealantisbasicallythesame,theperformanceindexcanrefertothesealant,adhesivejointstructurecombinedwiththeactualuse.硅酮耐候密封胶的主要技术指标中，表征施工性能的有下垂度、挤出性、表干时间，表征固化后耐候胶性能的主要是位移能力和质量损失率。耐候胶的质量损失率与结构胶的热失重相当，主要考察耐候胶在长期使用后的性能变化情况，质量损失率越高，长期使用后性能下降越严重。Themaintechnicalindexesofsiliconeweatherresistantsealantincludesagging,extrusionandsurfacedrying.Thedisplacementandmasslossratearethemaincharacteristicsofweatherresistantadhesiveaftercuring.Themasslossrateofweatherresistantadhesiveissimilartothatofstructuraladhesive.Theperformancechangesofweatherresistantadhesiveafterlong-termusearemainlyinvestigated.Thehigherthemasslossrateis,themoreserioustheperformancedegradationwillbeafterlong-termuse.硅酮耐候密封胶的主要作用是对板块间接缝的密封，由于板块经常会受到温度变化、主体结构变形等影响而发生位移，导致接缝宽度也就会随之发生变化。这就要求耐候胶具有良好的承受接缝位移的能力，在长期承受接缝宽度变化的情况下不发生开裂，这一性能称为耐候胶的位移能力，与结构胶的“变位承受能力”不同。Themainroleofsiliconeweathersealantistosealthejointsbetweenplates,becausetheplateisoftensubjecttochangesintemperatureanddeformationofthemainstructureandotherdisplacement,resultinginjointwidthwillchangeaccordingly.Thisrequiresthattheweatherresistantadhesivehasgoodabilitytowithstandthedisplacementofjoints,anditdoesnotcrackundertheconditionthatthejointwidthischangedforalongtime.Thisperformanceiscalledthedisplacementabilityofweatherresistantadhesive,whichisdifferentfromthestructuraladhesive's"changebearingcapacity".)