For 1100 with Dye, will the dye become invisible within two hours?

No, it takes longer than two hours for the dye to become invisible. ASTM C309, Section 5.1 states the following: “… Membrane-forming compounds with a fugitive dye (Type 1-D) shall be readily distinguishable upon the concrete surface for at least 4 hours after application but shall become inconspicuous within 7 days after application if exposed to direct sunlight.” Our product meets this specification and follows these parameters.