DOW CORNING® 123 SILICONE SEAL-ALL COLORS Product Description: Two part fast cure insulating glass secondary sealant for non-structurally glazed insulated glass. Gray in color, neutral cure.. DOW CORNING® 123 SILICONE SEAL CUSTOM DESIGNS H.C. Product Description: Dow Corning¨ 123 Silicone Seal Custom Designs H.C. are pre-formed two- and three-dimensional silicone shapes that are bonded to substrates using recommended Dow Corning¨ brand silicone sealants.     © Sealant Sales LLC • (877) 777-5300