The industry standard for more than 30 years, THERMALBOND® is the world’s most recognized brand of structural glazing spacer. THERMALBOND® is designed for use in structural silicone glazing systems where there is direct contact with the silicone adhesive. THERMALBOND® temporarily fastens the glass to the frame, allowing movement of units through the shop. The vapor permeable cell structure provides for rapid curing of the silicone adhesive. The 2100 series is ideal for fiedl or shop glazing and is avaible with black and gray colors in thicknesses from 1/8″ up to 1/2″.