Epoxy resin conveniently seals leaks on any type of vacuum system or component. It is solvent-free and can be used at pressures of 10-9 Torr (mbar) and below, at temperatures from -45 C to 120 C (bakeable temperature). These Varian Torr Seal Vacuum Equipment High Vacuum Expoy are packaged in two separate tubes; part A Base Resin in a 82 gram tube and Part B Hardener in a 36 gram tube (Varian Item Number 9530001).