A solvent-based Thermoplastic Rubber coating specially formulated to provide a tough, water resistant seal that remains flexible. Sets up in 30 to 60 minutes eliminating the dangers of a wash off due to a sudden rain. When dried, this coating is resistant to dirt pick up as it is fortified with TPFE. DYCO #890 protects, beautifies, and insulates, displaying high reflective values for cooling your roof.