O jẹ iru iwọn otutu apakan meji-meji vulcanized polysulphide sealant pẹlu iṣẹ giga paapaa ti a ṣe agbekalẹ fun gilasi idabobo.Eleyi sealant ni o ni o tayọ elasticity, ooru gaasi ilaluja ati adherent iduroṣinṣin si orisirisi gilaasi.