Gelation of alginate-based sealants were assessed using oscillatory time sweeps at 10% radial strain and 1 Hz during exposure to green light (525 nm) over a period of 10 minutes. (A, B) Alg-MA and oxidized Alg-MA, and (C, D) homogenous 50:50 blends of Alg-MA and Alg-MA-Ox. Delta values decreased as crosslinking occurred via visible light exposure to form hydrogels (A, C). Storage moduli values, G′, and loss moduli values, G″, were collected during gelation (B, D). Representative plots for each control and experimental group are shown as average values (n = 4).