EnerSeal JS780S, a new product by Tremco debuting at GlassBuild America, is a one-component polyisobutylene-based primary insulating glass sealant, specially developed for the manufacturing of insulating glass units. EnerSeal JS780S is a recommended sealant for use along with a secondary sealant with warm-edge D or T shaped spacers. EnerSeal JS780S provides a barrier to moisture vapor ingress and gas loss and is specially developed for the manufacturing of IG units using pre-extruded, flexible warm-edge spacers.