Longer envelope life, resulting in a lower-cost-per cureGauge consistency for uniform envelope thicknessThicker skirt and bead, more resistant to abrasion defectsDesigned thickness around the valve and in the crownFactory lubrication that extends envelope lifeBetter fit and better performanceMinimized envelope growthMaximized damage resistanceTear resistance from j-hooks and spreadersRetained pliability throughout the envelope lifeSuperior holding pressure to keep a seal during entire curing process
