This fluid is of a higher concentration of glycol than deicing fluid.

CNN: Airplane deicing: The how and why

Anti-icing fluid also has an additive that thickens it more than deicing fluid to help it adhere to aircraft surfaces as it speeds down the runway during takeoff.

CNN: Airplane deicing: The how and why

In these cases, anti-icing fluid is applied after the deicing process is complete.

CNN: Airplane deicing: The how and why