standard colors and unlimited custom colors. Dow Corning 123 Silicone Seal is a pre-formed, ultra-low modulus silicone extrusion that is bonded to substrates using Dow Corning 791... and as a restoration joint on EIFS at both the EIFS-to-EIFS joints and window perimeter joints and can provide a complete weatherseal system when used with Dow Corning AllGuard Silicone...