SEALING AND WEATHERPROOFING: To ensure the longevity and performance from the glazing system, appropriate sealing and weatherproofing  actions are important. Sealants, gaskets, and weatherstripping is applied to make an airtight and watertight barrier in between the glass panels plus the supporting framework. R-benefit unaffected by humidity : Prevents condensation : https://raymondl539sng8.shoutmyblog.com/33865569/about-double-glazing