Signal Wire Sealant (Drum Formula for Pump Application) for encapsulating electronic signal wire and devices Polymer Polyester Resin based sealant formulated for encapsulating signal wire. STAT-A-FLEX® Signal Wire Sealants are designed for maximum protection of signal systems in both asphalt and concrete aggregate roadways. It has outstanding adhesion, flexural and tensile strength to ensure the longest possible life of the signal system. Engineered for use with resin dispensing guns. Meets FAA specifications for Portland Cement runway construction.