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Super Spacer® TriSeal™ from Quanex is the premium choice for commercial and architectural insulating glass needs, including silicone structural glazing. With its unique triple-seal design incorporating an inner acrylic adhesive seal for immediate unit handling, a polyisobutylene primary seal for enhanced gas retention and low moisture vapor transmission, and an outer silicone seal for proven structural strength and superior durability, TriSeal is trusted the world over for the most demanding commercial glass applications.